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Integrated Geologic Map Databases for the United States: Alabama, Florida, Georgia, Mississippi, North Carolina, and South Carolina

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What does this data set describe?

Title:: Integrated Geologic Map Databases for the United States: Alabama, Florida, Georgia, Mississippi, North Carolina, and South Carolina
Abstract:: This report presents the results of the USGS Mineral Resources Program activity to compile a national-scale geologic map database to support national and regional level projects, including mineral resource and geoenvironmental assessments. The only comprehensive sources of regional- and national-scale geologic maps are state geologic maps with scales ranging from 1:100,000 to 1:1,000,000. Digital versions of these state maps form the core of what is presented here. Because no adequate geologic map exists for the state of Alaska, it is being compiled in regional blocks that also form part of this national database. It is expected that this series will completed by approximately the end of 2007. These maps and databases are being released in blocks of states or, in the case of Alaska, as compiled blocks of 1:250,000-scale quadrangles as chapters in this series. For Alaska, formal maps as well as databases are being published here, whereas for the conterminous U.S. only state databases and preview graphics are presented, because published maps for most states already exist. For Alaska these regional compilations will form the base for compiling a new geologic map of the state. As documented in Chapter A, standards for the conterminous U.S. are somewhat different than those for Alaska and Hawaii.
Supplemental_Information:: This database consists of five major Arc/Info GIS datasets for each state; - one: geologic map with formations, - two: faults (where present), - three: dikes (where present), - four: miscellaneous line features (where present), - five: miscellaneous point features (where present).

How should this data set be cited?
Dicken, Connie L., Nicholson, Suzanne W., Horton, John D., Foose, Michael P., and Mueller, Julia A.L., 2005, Integrated Geologic Map Databases for the United States: Alabama, Florida, Georgia, Mississippi, North Carolina, and South Carolina: U.S. Geological Survey Open-File Report 2005-1323, U.S. Geological Survey, Reston, VA.
Online Links:
- <http://pubs.usgs.gov/of/2005/1323>
What geographic area does the data set cover?

West_Bounding_Coordinate: -85.605461

East_Bounding_Coordinate: -80.791929

North_Bounding_Coordinate: 35.000546

South_Bounding_Coordinate: 30.355477
What does it look like?
Does the data set describe conditions during a particular time period?

Calendar_Date: 2005
Currentness_Reference: publication date
What is the general form of this data set?

Geospatial_Data_Presentation_Form: map
How does the data set represent geographic features?
1. How are geographic features stored in the data set?
  This is a Vector data set.
2. What coordinate system is used to represent geographic features?
  The map projection used is Lambert Conformal Conic.
  
  Projection parameters:
  
  Standard_Parallel: 33
  
  Standard_Parallel: 45
  
  Longitude_of_Central_Meridian: -100.0
  
  Latitude_of_Projection_Origin: 0
  
  False_Easting: 0.00000
  
  False_Northing: 0.00000
  
  Planar coordinates are encoded using coordinate pair
  Abscissae (x-coordinates) are specified to the nearest 0.01
  Ordinates (y-coordinates) are specified to the nearest 0.01
  Planar coordinates are specified in Meters
  
  The horizontal datum used is North American Datum of 1927.
  The ellipsoid used is Clarke 1866.
  The semi-major axis of the ellipsoid used is 6378206.4.
  The flattening of the ellipsoid used is 1/294.98.

How does the data set describe geographic features?

ga_geol.pat

Polygon attribute table for the Georgia geologic coverage. (Source: ESRI)

orig_label

unmodified map unit symbol from source cover.

type: character width: 12 output width: 12 (Source: Doug Stoeser)

Value	Definition
bg1	Biotite Gneiss
bg2	Biotite Gneiss/Amphibolite
bg3	Biotite Gneiss/ Hornblende Gneiss/ Granite Gneiss
bg4	Biotite Gneiss/ Mica Schist
c1	Mylonite and ultramylonite
c2	Flinty Crush Rock
Cc	Conasauga Group; Middle unit; Shale unit
Ccd	Conasauga Group; Upper unit; Dolostone member
Ccdl	Conasauga Group; Lower unit; lower dolostone unit
Cch	Chilhowee Formation
Ccls	Conasauga Group; Middle unit; Limestone unit
Ccm	Conasauga Group; Maynardville Limestone
Ccr	Copper Ridge Dolomite
Ccs	Conasauga Group; Lower unit; shale and sandstone unit
Ccsl	Conasauga Group; Upper unit; limestone and shale unit
Cr	Rome Formation
Cs	Shady Dolomite
d	Diabase
Da	Armuchee Chert
Dfm	Frog Mountain
DMu	Devonian-Missisippian undivided
Ec	Claiborne undifferentiated
Ecl	Clinchfield Sand
Ecm	Cooper Marl
Ei	Irwinton Sand
Eli	Lisbon Formation
Em	McBean Formation
Eo	Ocala Limestone
Eo-Os	Eocene and Oligocene Residuum, undifferentiated
Es	Sandersville Limestone
Eta	Tallahatta Formation
Etw	Twiggs Clay
Eu	Eocene undifferentiated
fg1	Biotite Gneiss/ Feldspathic Biotite Gneiss
fg1a	Biotite Granite Gneiss/ Feldspathic Biotite Gneiss/ Amphibolite Hornblende Gneiss
fg2	Biotitic Gneiss Undifferentiated
fg3	Biotitic Gneiss / Mica Schist/ Amphibolite
fg4	Biotitic Gneiss / Amphibolite
gg1	Granitic Gneiss undifferentiated
gg2	Granitic Gneiss / Gneissic Granite (augen or porphyritic)
gg3	Muscovite Granite Gneiss
gg4	Granite Gneiss/ Amphibolite
gg5	Calc-silicate Granite Gneiss
gg6	Granite Gneiss/ Granite
gr1	Granite undifferentiated
gr1a	Non-porphyritic granite
gr1b	Porphyritic granite
gr2	Granite/ granite gneiss
gr2a	Granite/ gneissic biotite granite
gr3	Granite/ biotite granite/ amphibolite
gr4	Charnockite
gr5	Syenite
Kb	Blufftown Formation
Kc	Cusseta Sand
Kcbe	Cusseta, Bluffotwn, and Eutaw Formations, undifferentiated
Ke	Eutaw Formation
Kp	Providence Sand
Kr	Ripley Formation
Kt	Tuscaloosa Formation
m1	Marble
m2	Calcareous mica schist/ Micaceous marble/ Mica schist
Mb	Bangor Limestone
Mfp	Fort Payne Chert
Mfs	Floyd Shale
Mh	"Hawthorn Formation"
Mh	Floyd Shale; Hartselle Sandstone member
Ml	Floyd Shale; unnamed limestone member
Mls	Fort Payne Shale; Lavender Shale Member
mm1	Amphibolite
mm2	Hornblende Gneiss
mm3	Hornblende Gneiss/ Amphibolite
mm4	Hornblende Gneiss/ Amphibolite/ Granite Gneiss
mm5	Hornblende-Biotite Gneiss/ Amphibolite
mm6	Hornblende Gneiss/ Granite Gneiss/ Biotite Gneiss
mm7	Amphibolite/ Epidote Quartzite/ Granite Gneiss
mm8	Amphibolite/ Biotitic Gneiss/ Quartz Sericite Schist
mm9	Amphibolite/ Mica Schist/ Biotitic Gneiss
mm10	Amphibolite/ Metagraywacke/ Mica Schist
mm11	Mafic Hornfels
mp1	Amphibolite / gabbro
mp2	Gabbro
mp3	Amphibolite/ Ultramafic
ms1	Amphibolitic Schist
ms2	Amphibolitic Schist/ Amphibolite
ms3	Amphibolitic Schist/ Amphibolite-Metagraywacke/ Mica Schist
Mu	Mississippian undifferentiated
mu	Undifferentiated pelitic rocks
Nm	Miccosukee Formation
Nu	Neogene undifferentiated
Oa	Chickamauga Group; Middle Ordovician rocks; Athens Shale
Oc	Chickamauga Group undivided
Och	Chickamauga Group; Chota Formation
OCk	Knox Group undifferentiated
Oh	Chickamauga Group; Holston Limestone
Ol	Chickamauga Group; Middle Ordovician rocks; Lenoir Limestone
Omb	Chickamauga Group; Upper and Middle Ordovician Rocks (Omb) includes Moccasin Limestone and Bays Formation
On	Newala Limestone
Or	Chickamauga Group; Middle Ordovician rocks; Rockmart Slate
Os	Suwannee Limestone and its residuum
Oum	Chickamauga Group; Upper and Middle Ordovician rocks (Oum) includes Sequatchie Limestone, Murfreesboro Limestone, Ridley Limestone, Moccasin Limestone and Bays Formation.
pa1	Aluminous Schist
pa2	Sillimanite Schist
pa2a	Sillimanite Schist/ Gneiss
pa2b	Sillimanite Schist/ Gneiss/ Amphibolite
pa2c	Sillimanite Schist/ Amphibolite
Pc	Clayton Formation
Pcd	Charlton Formation and Duplin Marl
Pcn	Nanafalia, Porters Creek, and Clayton Formations, undifferentiated
pg1	Garnet Mica Schist
pg2	Garnet Mica Schist/ Gneiss
pg3	Garnet Mica Schist/ Amphibolite
Plg	Lookout Sandstone; Gizzard Formation
Pls	Lookout Sandstone; Sewanee Sandstone
pm1	Metagraywacke undifferentiated
pm2	Metagraywacke/ Mica Schist
pm3	Metagraywacke/ Mica Schist/ Calc-silicate Gneiss
pm3a	Metagraywacke/ Mica Schist-Quartzite/ Amphibolite
pm4	Mica Schist/ Metasiltstone
pm5	Slate/ Quartzite/ Conglomerate
pm6	Conglomerate
pms1	Mica Schist
pms2	Mica Schist/ Amphibolite
pms3	Mica Schist/ Gneiss
pms3a	Mica Schist/ Gneiss/ Amphibolite
pms4	Mica Schist/ Quartzite/ Gneiss/ Amphibolite
pms5	Graphite Schist
pms6	Sericite Schist
pms6a	Sericite Schist/ Amphibolite
pms6b	Sericite Schist/ Amphibolite/ Granite gneiss
pms6c	Sericite Schist/ Micaceous Quartzite/ Sericite Phyllite
pms6d	Quartz Sericite Schist/ Biotitic Gneiss
pms6e	Quartz Mica Schist/ Hornblende Schist/ Biotitic Gneiss
pms7	Button Mica Schist
pms8	Cross-Biotite Schist
Pnf	Nanafalia Formation
pp1	Phyllite undifferentiated
pp1a	Meta-argillite/ Phyllite
pp2	Graphitic Phyllite
pp3	Phyllite and Quartzite
pp3a	Phyllite/ Quartzite/ Calc-silicate gneiss
PPs	Pleistocene-Pliocene sands and gravels
Ptu	Tuscahoma Sand
Pu	Pennsylvanian undifferentiated
q1	Quartzite
q1a	Quartzite/ Mica Schist
q1b	Quartzite/ Mica Schist/ Amphibolite
q1c	Quartzite/ Metagraywacke
q1d	Quartzite/ Phyllite
q2	Quartzite/ Biotite Granite Gneiss
q3	Epidote Quartzite/ Amphibolite/ Sericite Schist/ Biotite Granite Gneiss
Qal	Stream alluvium
Qas	Aeolian sand deposits - formless deposits
Qhi	Holocene Shoreline Complex - barrier island facies
Qhm	Holocene Shoreline Complex - marsh and lagoonal facies
Qpai	Princess Anne shoreline complex - barrier island facies
Qpam	Princess Anne shoreline complex - marsh and lagoonal facies
Qpd	Aeolian sand deposits - parabolic dunes
Qpmi	Pamlico shoreline complex - barrier island facies
Qpmm	Pamlico shoreline complex - marsh and lagoonal facies
Qpni	Penholoway shoreline complex - barrier island facies
Qpnm	Penholoway shoreline complex - marsh and lagoonal facies
Qsbi	Silver Bluff shoreline complex
Qti	Talbot shoreline complex - barrier island facies
Qtm	Talbot shoreline complex - marsh and lagoonal facies
Qwi	Wicomico Shoreline Complex - barrier island facies
Qwm	Wicomico Shoreline Complex - marsh and lagoonal facies
Srm	Red Mountain Formation
TKu	Lower Tertiary-Cretaceous undifferentiated
um	Ultramafic rocks undifferentiated
v1	Mafic to intermediate metavolcanic rocks
v2	Metadacite
v3	Felsic Metavolcanics
v4	Undifferentiated Metavolcanics/ Sericite phyllite/ Meta-argillite/ Quartz mica schist
v5	Meta-argillite/ Sericite phyllite/ Metavolcanics
water	water

sgmc_label

orig_label + ;n where n= province number (n=0 if no province number)

type: character width: 16 output width: 16 (Source: Doug Stoeser)

Value	Definition
bg1;3	Biotite Gneiss
bg2;3	Biotite Gneiss/Amphibolite
bg3;3	Biotite Gneiss/ Hornblende Gneiss/ Granite Gneiss
bg4;3	Biotite Gneiss/ Mica Schist
c1;3	Mylonite and ultramylonite
c2;3	Flinty Crush Rock
CAc;2	Conasauga Group; Middle unit; Shale unit
CAcd;2	Conasauga Group; Upper unit; Dolostone member
CAcdl;2	Conasauga Group; Lower unit; lower dolostone unit
CAch;2	Chilhowee Formation
CAcls;2	Conasauga Group; Middle unit; Limestone unit
CAcm;2	Conasauga Group; Maynardville Limestone
CAcr;2	Copper Ridge Dolomite
CAcs;2	Conasauga Group; Lower unit; shale and sandstone unit
CAcsl;2	Conasauga Group; Upper unit; limestone and shale unit
CAr;2	Rome Formation
CAs;2	Shady Dolomite
d;3	Diabase
Da;2	Armuchee Chert
Dfm;2	Frog Mountain
DMu;2	Devonian-Missisippian undivided
EOc;1	Claiborne undifferentiated
EOcl;1	Clinchfield Sand
EOcm;1	Cooper Marl
EOi;1	Irwinton Sand
EOli;1	Lisbon Formation
EOm;1	McBean Formation
EOo;1	Ocala Limestone
EOOGs;1	Eocene and Oligocene Residuum, undifferentiated
EOs;1	Sandersville Limestone
EOta;1	Tallahatta Formation
EOtw;1	Twiggs Clay
EOu;1	Eocene undifferentiated
fg1;3	Biotite Gneiss/ Feldspathic Biotite Gneiss
fg1a;3	Biotite Granite Gneiss/ Feldspathic Biotite Gneiss/ Amphibolite Hornblende Gneiss
fg2;3	Biotitic Gneiss Undifferentiated
fg3;3	Biotitic Gneiss / Mica Schist/ Amphibolite
fg4;3	Biotitic Gneiss / Amphibolite
gg1;3	Granitic Gneiss undifferentiated
gg2;3	Granitic Gneiss / Gneissic Granite (augen or porphyritic)
gg3;3	Muscovite Granite Gneiss
gg4;3	Granite Gneiss/ Amphibolite
gg5;3	Calc-silicate Granite Gneiss
gg6;3	Granite Gneiss/ Granite
gr1;3	Granite undifferentiated
gr1a;3	Non-porphyritic granite
gr1b;3	Porphyritic granite
gr2;3	Granite/ granite gneiss
gr2a;3	Granite/ gneissic biotite granite
gr3;3	Granite/ biotite granite/ amphibolite
gr4;3	Charnockite
gr5;3	Syenite
Kb;1	Blufftown Formation
Kc;1	Cusseta Sand
Kcbe;1	Cusseta, Bluffotwn, and Eutaw Formations, undifferentiated
Ke;1	Eutaw Formation
Kp;1	Providence Sand
Kr;1	Ripley Formation
Kt;1	Tuscaloosa Formation
m1;3	Marble
m2;3	Calcareous mica schist/ Micaceous marble/ Mica schist
Mb;2	Bangor Limestone
Mfp;2	Fort Payne Chert
Mfs;2	Floyd Shale
MIh;1	"Hawthorn Formation"
Mh;2	Floyd Shale; Hartselle Sandstone member
Ml;2	Floyd Shale; unnamed limestone member
Mls;2	Fort Payne Shale; Lavender Shale Member
mm1;3	Amphibolite
mm2;3	Hornblende Gneiss
mm3;3	Hornblende Gneiss/ Amphibolite
mm4;3	Hornblende Gneiss/ Amphibolite/ Granite Gneiss
mm5;3	Hornblende-Biotite Gneiss/ Amphibolite
mm6;3	Hornblende Gneiss/ Granite Gneiss/ Biotite Gneiss
mm7;3	Amphibolite/ Epidote Quartzite/ Granite Gneiss
mm8;3	Amphibolite/ Biotitic Gneiss/ Quartz Sericite Schist
mm9;3	Amphibolite/ Mica Schist/ Biotitic Gneiss
mm10;3	Amphibolite/ Metagraywacke/ Mica Schist
mm11;3	Mafic Hornfels
mp1;3	Amphibolite / gabbro
mp2;3	Gabbro
mp3;3	Amphibolite/ Ultramafic
ms1;3	Amphibolitic Schist
ms2;3	Amphibolitic Schist/ Amphibolite
ms3;3	Amphibolitic Schist/ Amphibolite-Metagraywacke/ Mica Schist
Mu;2	Mississippian undifferentiated
mu;3	Undifferentiated pelitic rocks
Nm;1	Miccosukee Formation
Nu;1	Neogene undifferentiated
Oa;2	Chickamauga Group; Middle Ordovician rocks; Athens Shale
Oc;2	Chickamauga Group undivided
Och;2	Chickamauga Group; Chota Formation
OCAk;2	Knox Group undifferentiated
Oh;2	Chickamauga Group; Holston Limestone
Ol;2	Chickamauga Group; Middle Ordovician rocks; Lenoir Limestone
Omb;2	Chickamauga Group; Upper and Middle Ordovician Rocks (Omb) includes Moccasin Limestone and Bays Formation
On;2	Newala Limestone
Or;2	Chickamauga Group; Middle Ordovician rocks; Rockmart Slate
OGs;1	Suwannee Limestone and its residuum
Oum;2	Chickamauga Group; Upper and Middle Ordovician rocks (Oum) includes Sequatchie Limestone, Murfreesboro Limestone, Ridley Limestone, Moccasin Limestone and Bays Formation.
pa1;3	Aluminous Schist
pa2;3	Sillimanite Schist
pa2a;3	Sillimanite Schist/ Gneiss
pa2b;3	Sillimanite Schist/ Gneiss/ Amphibolite
pa2c;3	Sillimanite Schist/ Amphibolite
PNc;1	Clayton Formation
POcd;1	Charlton Formation and Duplin Marl
PNcn;1	Nanafalia, Porters Creek, and Clayton Formations, undifferentiated
pg1;3	Garnet Mica Schist
pg2;3	Garnet Mica Schist/ Gneiss
pg3;3	Garnet Mica Schist/ Amphibolite
PAlg;2	Lookout Sandstone; Gizzard Formation
PAls;2	Lookout Sandstone; Sewanee Sandstone
pm1;3	Metagraywacke undifferentiated
pm2;3	Metagraywacke/ Mica Schist
pm3;3	Metagraywacke/ Mica Schist/ Calc-silicate Gneiss
pm3a;3	Metagraywacke/ Mica Schist-Quartzite/ Amphibolite
pm4;3	Mica Schist/ Metasiltstone
pm5;3	Slate/ Quartzite/ Conglomerate
pm6;3	Conglomerate
pms1;3	Mica Schist
pms2;3	Mica Schist/ Amphibolite
pms3;3	Mica Schist/ Gneiss
pms3a;3	Mica Schist/ Gneiss/ Amphibolite
pms4;3	Mica Schist/ Quartzite/ Gneiss/ Amphibolite
pms5;3	Graphite Schist
pms6;3	Sericite Schist
pms6a;3	Sericite Schist/ Amphibolite
pms6b;3	Sericite Schist/ Amphibolite/ Granite gneiss
pms6c;3	Sericite Schist/ Micaceous Quartzite/ Sericite Phyllite
pms6d;3	Quartz Sericite Schist/ Biotitic Gneiss
pms6e;3	Quartz Mica Schist/ Hornblende Schist/ Biotitic Gneiss
pms7;3	Button Mica Schist
pms8;3	Cross-Biotite Schist
PNnf;1	Nanafalia Formation
pp1;3	Phyllite undifferentiated
pp1a;3	Meta-argillite/ Phyllite
pp2;3	Graphitic Phyllite
pp3;3	Phyllite and Quartzite
pp3a;3	Phyllite/ Quartzite/ Calc-silicate gneiss
PSPOs;1	Pleistocene-Pliocene sands and gravels
PNtu;1	Tuscahoma Sand
PAu;2	Pennsylvanian undifferentiated
q1;3	Quartzite
q1a;3	Quartzite/ Mica Schist
q1b;3	Quartzite/ Mica Schist/ Amphibolite
q1c;3	Quartzite/ Metagraywacke
q1d;3	Quartzite/ Phyllite
q2;3	Quartzite/ Biotite Granite Gneiss
q3;3	Epidote Quartzite/ Amphibolite/ Sericite Schist/ Biotite Granite Gneiss
Qal;1	Stream alluvium
Qas;1	Aeolian sand deposits - formless deposits
Qhi;1	Holocene Shoreline Complex - barrier island facies
Qhm;1	Holocene Shoreline Complex - marsh and lagoonal facies
Qpai;1	Princess Anne shoreline complex - barrier island facies
Qpam;1	Princess Anne shoreline complex - marsh and lagoonal facies
Qpd;1	Aeolian sand deposits - parabolic dunes
Qpmi;1	Pamlico shoreline complex - barrier island facies
Qpmm;1	Pamlico shoreline complex - marsh and lagoonal facies
Qpni;1	Penholoway shoreline complex - barrier island facies
Qpnm;1	Penholoway shoreline complex - marsh and lagoonal facies
Qsbi;1	Silver Bluff shoreline complex
Qti;1	Talbot shoreline complex - barrier island facies
Qtm;1	Talbot shoreline complex - marsh and lagoonal facies
Qwi;1	Wicomico Shoreline Complex - barrier island facies
Qwm;1	Wicomico Shoreline Complex - marsh and lagoonal facies
Srm;2	Red Mountain Formation
TKu;1	Lower Tertiary-Cretaceous undifferentiated
um;3	Ultramafic rocks undifferentiated
v1;3	Mafic to intermediate metavolcanic rocks
v2;3	Metadacite
v3;3	Felsic Metavolcanics
v4;3	Undifferentiated Metavolcanics/ Sericite phyllite/ Meta-argillite/ Quartz mica schist
v5;3	Meta-argillite/ Sericite phyllite/ Metavolcanics
water;0	water

unit_link

composite map label = ST + sgmc_label This creates a unique identifier for every unit in the CONUS (continental United States) covers.

type: character width: 18 output width: 18 (Source: Doug Stoeser)

Value	Definition
GAbg1;3	Biotite Gneiss
GAbg2;3	Biotite Gneiss/Amphibolite
GAbg3;3	Biotite Gneiss/ Hornblende Gneiss/ Granite Gneiss
GAbg4;3	Biotite Gneiss/ Mica Schist
GAc1;3	Mylonite and ultramylonite
GAc2;3	Flinty Crush Rock
GACAc;2	Conasauga Group; Middle unit; Shale unit
GACAcd;2	Conasauga Group; Upper unit; Dolostone member
GACAcdl;2	Conasauga Group; Lower unit; lower dolostone unit
GACAch;2	Chilhowee Formation
GACAcls;2	Conasauga Group; Middle unit; Limestone unit
GACAcm;2	Conasauga Group; Maynardville Limestone
GACAcr;2	Copper Ridge Dolomite
GACAcs;2	Conasauga Group; Lower unit; shale and sandstone unit
GACAcsl;2	Conasauga Group; Upper unit; limestone and shale unit
GACAr;2	Rome Formation
GACAs;2	Shady Dolomite
GAd;3	Diabase
GADa;2	Armuchee Chert
GADfm;2	Frog Mountain
GADMu;2	Devonian-Missisippian undivided
GAEOc;1	Claiborne undifferentiated
GAEOcl;1	Clinchfield Sand
GAEOcm;1	Cooper Marl
GAEOi;1	Irwinton Sand
GAEOli;1	Lisbon Formation
GAEOm;1	McBean Formation
GAEOo;1	Ocala Limestone
GAEOOGs;1	Eocene and Oligocene Residuum, undifferentiated
GAEOs;1	Sandersville Limestone
GAEOta;1	Tallahatta Formation
GAEOtw;1	Twiggs Clay
GAEOu;1	Eocene undifferentiated
GAfg1;3	Biotite Gneiss/ Feldspathic Biotite Gneiss
GAfg1a;3	Biotite Granite Gneiss/ Feldspathic Biotite Gneiss/ Amphibolite Hornblende Gneiss
GAfg2;3	Biotitic Gneiss Undifferentiated
GAfg3;3	Biotitic Gneiss / Mica Schist/ Amphibolite
GAfg4;3	Biotitic Gneiss / Amphibolite
GAgg1;3	Granitic Gneiss undifferentiated
GAgg2;3	Granitic Gneiss / Gneissic Granite (augen or porphyritic)
GAgg3;3	Muscovite Granite Gneiss
GAgg4;3	Granite Gneiss/ Amphibolite
GAgg5;3	Calc-silicate Granite Gneiss
GAgg6;3	Granite Gneiss/ Granite
GAgr1;3	Granite undifferentiated
GAgr1a;3	Non-porphyritic granite
GAgr1b;3	Porphyritic granite
GAgr2;3	Granite/ granite gneiss
GAgr2a;3	Granite/ gneissic biotite granite
GAgr3;3	Granite/ biotite granite/ amphibolite
GAgr4;3	Charnockite
GAgr5;3	Syenite
GAKb;1	Blufftown Formation
GAKc;1	Cusseta Sand
GAKcbe;1	Cusseta, Bluffotwn, and Eutaw Formations, undifferentiated
GAKe;1	Eutaw Formation
GAKp;1	Providence Sand
GAKr;1	Ripley Formation
GAKt;1	Tuscaloosa Formation
GAm1;3	Marble
GAm2;3	Calcareous mica schist/ Micaceous marble/ Mica schist
GAMb;2	Bangor Limestone
GAMfp;2	Fort Payne Chert
GAMfs;2	Floyd Shale
GAMIh;1	"Hawthorn Formation"
GAMh;2	Floyd Shale; Hartselle Sandstone member
GAMl;2	Floyd Shale; unnamed limestone member
GAMls;2	Fort Payne Shale; Lavender Shale Member
GAmm1;3	Amphibolite
GAmm2;3	Hornblende Gneiss
GAmm3;3	Hornblende Gneiss/ Amphibolite
GAmm4;3	Hornblende Gneiss/ Amphibolite/ Granite Gneiss
GAmm5;3	Hornblende-Biotite Gneiss/ Amphibolite
GAmm6;3	Hornblende Gneiss/ Granite Gneiss/ Biotite Gneiss
GAmm7;3	Amphibolite/ Epidote Quartzite/ Granite Gneiss
GAmm8;3	Amphibolite/ Biotitic Gneiss/ Quartz Sericite Schist
GAmm9;3	Amphibolite/ Mica Schist/ Biotitic Gneiss
GAmm10;3	Amphibolite/ Metagraywacke/ Mica Schist
GAmm11;3	Mafic Hornfels
GAmp1;3	Amphibolite / gabbro
GAmp2;3	Gabbro
GAmp3;3	Amphibolite/ Ultramafic
GAms1;3	Amphibolitic Schist
GAms2;3	Amphibolitic Schist/ Amphibolite
GAms3;3	Amphibolitic Schist/ Amphibolite-Metagraywacke/ Mica Schist
GAMu;2	Mississippian undifferentiated
GAmu;3	Undifferentiated pelitic rocks
GANm;1	Miccosukee Formation
GANu;1	Neogene undifferentiated
GAOa;2	Chickamauga Group; Middle Ordovician rocks; Athens Shale
GAOc;2	Chickamauga Group undivided
GAOch;2	Chickamauga Group; Chota Formation
GAOCAk;2	Knox Group undifferentiated
GAOh;2	Chickamauga Group; Holston Limestone
GAOl;2	Chickamauga Group; Middle Ordovician rocks; Lenoir Limestone
GAOmb;2	Chickamauga Group; Upper and Middle Ordovician Rocks (Omb) includes Moccasin Limestone and Bays Formation
GAOn;2	Newala Limestone
GAOr;2	Chickamauga Group; Middle Ordovician rocks; Rockmart Slate
GAOGs;1	Suwannee Limestone and its residuum
GAOum;2	Chickamauga Group; Upper and Middle Ordovician rocks (Oum) includes Sequatchie Limestone, Murfreesboro Limestone, Ridley Limestone, Moccasin Limestone and Bays Formation.
GApa1;3	Aluminous Schist
GApa2;3	Sillimanite Schist
GApa2a;3	Sillimanite Schist/ Gneiss
GApa2b;3	Sillimanite Schist/ Gneiss/ Amphibolite
GApa2c;3	Sillimanite Schist/ Amphibolite
GAPNc;1	Clayton Formation
GAPOcd;1	Charlton Formation and Duplin Marl
GAPNcn;1	Nanafalia, Porters Creek, and Clayton Formations, undifferentiated
GApg1;3	Garnet Mica Schist
GApg2;3	Garnet Mica Schist/ Gneiss
GApg3;3	Garnet Mica Schist/ Amphibolite
GAPAlg;2	Lookout Sandstone; Gizzard Formation
GAPAls;2	Lookout Sandstone; Sewanee Sandstone
GApm1;3	Metagraywacke undifferentiated
GApm2;3	Metagraywacke/ Mica Schist
GApm3;3	Metagraywacke/ Mica Schist/ Calc-silicate Gneiss
GApm3a;3	Metagraywacke/ Mica Schist-Quartzite/ Amphibolite
GApm4;3	Mica Schist/ Metasiltstone
GApm5;3	Slate/ Quartzite/ Conglomerate
GApm6;3	Conglomerate
GApms1;3	Mica Schist
GApms2;3	Mica Schist/ Amphibolite
GApms3;3	Mica Schist/ Gneiss
GApms3a;3	Mica Schist/ Gneiss/ Amphibolite
GApms4;3	Mica Schist/ Quartzite/ Gneiss/ Amphibolite
GApms5;3	Graphite Schist
GApms6;3	Sericite Schist
GApms6a;3	Sericite Schist/ Amphibolite
GApms6b;3	Sericite Schist/ Amphibolite/ Granite gneiss
GApms6c;3	Sericite Schist/ Micaceous Quartzite/ Sericite Phyllite
GApms6d;3	Quartz Sericite Schist/ Biotitic Gneiss
GApms6e;3	Quartz Mica Schist/ Hornblende Schist/ Biotitic Gneiss
GApms7;3	Button Mica Schist
GApms8;3	Cross-Biotite Schist
GAPNnf;1	Nanafalia Formation
GApp1;3	Phyllite undifferentiated
GApp1a;3	Meta-argillite/ Phyllite
GApp2;3	Graphitic Phyllite
GApp3;3	Phyllite and Quartzite
GApp3a;3	Phyllite/ Quartzite/ Calc-silicate gneiss
GAPSPOs;1	Pleistocene-Pliocene sands and gravels
GAPNtu;1	Tuscahoma Sand
GAPAu;2	Pennsylvanian undifferentiated
GAq1;3	Quartzite
GAq1a;3	Quartzite/ Mica Schist
GAq1b;3	Quartzite/ Mica Schist/ Amphibolite
GAq1c;3	Quartzite/ Metagraywacke
GAq1d;3	Quartzite/ Phyllite
GAq2;3	Quartzite/ Biotite Granite Gneiss
GAq3;3	Epidote Quartzite/ Amphibolite/ Sericite Schist/ Biotite Granite Gneiss
GAQal;1	Stream alluvium
GAQas;1	Aeolian sand deposits - formless deposits
GAQhi;1	Holocene Shoreline Complex - barrier island facies
GAQhm;1	Holocene Shoreline Complex - marsh and lagoonal facies
GAQpai;1	Princess Anne shoreline complex - barrier island facies
GAQpam;1	Princess Anne shoreline complex - marsh and lagoonal facies
GAQpd;1	Aeolian sand deposits - parabolic dunes
GAQpmi;1	Pamlico shoreline complex - barrier island facies
GAQpmm;1	Pamlico shoreline complex - marsh and lagoonal facies
GAQpni;1	Penholoway shoreline complex - barrier island facies
GAQpnm;1	Penholoway shoreline complex - marsh and lagoonal facies
GAQsbi;1	Silver Bluff shoreline complex
GAQti;1	Talbot shoreline complex - barrier island facies
GAQtm;1	Talbot shoreline complex - marsh and lagoonal facies
GAQwi;1	Wicomico Shoreline Complex - barrier island facies
GAQwm;1	Wicomico Shoreline Complex - marsh and lagoonal facies
GASrm;2	Red Mountain Formation
GATKu;1	Lower Tertiary-Cretaceous undifferentiated
GAum;3	Ultramafic rocks undifferentiated
GAv1;3	Mafic to intermediate metavolcanic rocks
GAv2;3	Metadacite
GAv3;3	Felsic Metavolcanics
GAv4;3	Undifferentiated Metavolcanics/ Sericite phyllite/ Meta-argillite/ Quartz mica schist
GAv5;3	Meta-argillite/ Sericite phyllite/ Metavolcanics
GAwater;0	water

source

An alphanumeric code (e.g. US001) that designates the source material used.

type: character width: 6 output width: 8 (Source: Doug Stoeser)

Value	Definition
GA001	Lawton, D.E., and others, 1976, Geologic Map of Georgia: Georgia Geological Survey, scale = 1:500,000.
GA002	1:500k GEOLOGY COVER: geology.zip available at Georgia GIS Data Clearinghouse <http://gis1.state.ga.us/index.asp> Do a theme search category "geology", keyword "geology" Data was indicated to be "free" therefore public domain Information available at site: Title Geology Location: Georgia Scale: 1:500,000 File Format: ArcInfo Export File Projection: Lambert Conformal Conic Originator Georgia Department of Natural Resources Index: Published: 1999 Updated: 10/9/2000 For more information about this dataset please visit the Georgia Department of Natural Resources.
GA201	C.L. Dicken polygon edits. Additionally, when using US001 state boundary file, water polygons have been generated.

unit_age

The geologic age from the source map used.

type: character width: 60 output width: 60 (Source: Doug Stoeser)

Value	Definition
Age not given
Cambrian
Cretaceous
Devonian
Devonian-Mississippian
Eocene
Eocene-Oligocene
Holocene
Lower Tertiary-Cretaceous
Middle Ordovician
Mississippian
Neogene
Oligocene
Ordovician
Ordovician-Cambrian
Paleocene
Pennsylvanian
Pleistocene
Pleistocene-Pliocene
Pliocene
Quaternary
Silurian

rocktype1

The predominant lithology found in the formation.

type: character width: 40 output width: 40 (Source: Johnson Lith Class 6.1a)

Value	Definition
alluvium
amphibole schist
amphibolite
beach sand
biotite gneiss
biotite schist
charnockite
chert
clay or mud
conglomerate
dolostone (dolomite)
dune sand
felsic metavolcanic rock
gabbro
gneiss
granite
granitic gneiss
hornfels
limestone
mafic gneiss
mafic metavolcanic rock
marble
metasedimentary rock
metavolcanic rock
mica schist
mylonite
phyllite
quartzite
sand
sandstone
schist
shale
slate
syenite
ultramafic intrusive rock
unconsolidated deposit
water

rocktype2

The second most predominant lithology in the formation.

type: character width: 40 output width: 40 (Source: Johnson Lith Class 6.1a)

Value	Definition
alluvial terrace
amphibole schist
amphibolite
biotite gneiss
calcarenite
chert
clay or mud
claystone
felsic gneiss
gabbro
gneiss
granitic gneiss
gravel
graywacke
intermediate intrusive rock
limestone
mafic gneiss
marble
metasedimentary rock
mica schist
phyllite
quartzite
sand
sandstone
shale

ga_geol.aat

Arc attribute table for Georgia geologic coverage. (Source: ESRI)

arc-code

Unique identifier for the line feature

type: integer width: 3 output width: 3 (Source: AAT data dictionary)

Value	Definition
1	contact, location certain
7	shoreline or riverbank
124	state boundary

arc-para1

Used for "decorated" lines where additional information is needed.

type: integer width: 3 output width: 3 (Source: AAT data dictionary)

Value	Definition
0	no additional information

arc-para2

"Scratch" field used mostly in Alaska.

type: integer width: 3 output width: 3 (Source: AAT data dictionary)

Value	Definition
0	no additional information
5	Brevard zone with intense cataclasis

source

An alphanumeric code (e.g. US001) that designates the source material used.

type: character width: 6 output width: 8 (Source: Doug Stoeser)

Value	Definition
GA002	1:500k GEOLOGY COVER: geology.zip available at Georgia GIS Data Clearinghouse <http://gis1.state.ga.us/index.asp> Do a theme search category "geology", keyword "geology" Data was indicated to be "free" therefore public domain Information available at site: Title Geology Location: Georgia Scale: 1:500,000 File Format: ArcInfo Export File Projection: Lambert Conformal Conic Originator Georgia Department of Natural Resources Index: Published: 1999 Updated: 10/9/2000 For more information about this dataset please visit the Georgia Department of Natural Resources.
GA101	C.L. Dicken arc edits based on error checking with the paper map (GA001).
US001	Johnson, Bruce R. and Leveritch, Beth, 1998, 1:100,000 Scale State Boundaries of the Conterminous United States: U.S. Geological Survey, unpublished (see metadata file: st100kmeta.txt, Chapter A)

Entity_and_Attribute_Overview:

Coding for polygon attributes:

NAME: FEATURE: orig_label unmodified map unit symbols from source cover sgmc_label orig_label modified for standard geologic age symbols and an integer code added for province unit_link sgmc_label and a state code identifier source reference to source of data unit_age geologic age rocktype1 predominant lithology rocktype2 second most predominant lithology

Coding for arc attributes:

NAME: FEATURE: arc-code unique integer identifier arc-para1 used where additional information is needed arc-para2 scratch field source reference to source of data

Coding for point attributes:

NAME: FEATURE: point_feature name of feature on map source reference to source of data

Coding for dikes (special arcs) attributes:

NAME: FEATURE: orig_label unmodified map unit symbols from source cover sgmc_label orig_label modified for standard geologic age symbols and an integer code added for province arc-code unique integer identifier dike_lith general lithology dike_age geologic age source reference to source of data

Entity_and_Attribute_Detail_Citation: ESRI

Who produced the data set?

Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
- Connie L. Dicken
- Suzanne W. Nicholson
- John D. Horton
- Michael P. Foose
- Julia A.L. Mueller
Who also contributed to the data set?

State Geologic Map Compilation (SGMC) activity of the National Surveys and Analysis projects of the US Geological Survey Mineral Resources Program.
To whom should users address questions about the data?

Suzanne W. Nicholson
U.S. Geological Survey
12201 Sunrise Valley Dr. MS954
Reston, VA 20192
USA

703-648-6344 (voice)
swnich@usgs.gov

Why was the data set created?

A primary goal of this work is to develop geologic map datasets with standardized structure and attribution. The database design and standards are documented in Chapter A of this series. The intent is that contiguous databases can be merged seamlessly and without any additional effort. In addition to a common database structure, the conterminous U.S. state databases (the contiguous 48 states) have been fitted to a set of standard state boundaries so that, when states are merged, they match without slivers or overlap. No attempt has been made to reconcile differences in mapping across state boundaries.

How was the data set created?

From what previous works were the data drawn?
georgia - digital (source 1 of 1)
Survey, Georgia Geologic, 1999, Digital Geologic Map of Georgia (Ver. 2): Documentation Report 99-20, Georgia Department of Natural Resources Environmental Protection Division Georgia Geologic Survey, Atlanta, Georgia.
Online Links:
- https://gis1.state.ga.us/index.asp
Type_of_Source_Media: digital map

Source_Scale_Denominator: 500,000

Source_Contribution: provided linework and attributes for georgia
How were the data generated, processed, and modified?

Date: 2003 (process 1 of 10)
The purpose of this standardization is to allow all SGMC covers to be seamlessly joined without any additional effort to form regional or national level digital maps. Note that for Alaska, the state is being compiled as blocks of 1:250k quadrangles that will ultimately be used to compile a new state map. Douglas Stoeser and Ric Wilson are co-coordinators for the overall SGMC effort, with Stoeser coordinating work on the mainland states and Wilson coordinating work for Alaska and Hawaii.

Date: 08-Nov-2004 (process 2 of 10)
C.L. Dicken obtained the digital geologic map of Georgia from the following website: https://gis1.state.ga.us/index.asp
Dicken re-projected the coverage into the following:
projection: Lambert Conformal Conic units: meters datum: NAD27 standard parallel 1: 33 0 0.000 standard parallel 2: 45 0 0.000 central meridian: -100 0 0.000 reference latitude: 0 0 0.000 false easting: 0.00000 false northing: 0.00000
All attributes were deleted except GEOLCODE.
(Note: Attributes associated with the generation of the coverages were not deleted. PAT - shape, area, perimeter, coverage#, and coverage-id AAT - shape, fnode#, tnode#, lnode#, rnode#, length, coverage#, and coverage-id)
The values from GEOLCODE where then calculated into a new field called orig_label.

Date: 08-Nov-2004 (process 3 of 10)
The relevant state outline (arcs) was removed from the coverage and replaced with the arcs from the 1:100,000 Scale State Boundaries of the Conterminous United States.
This allows for a seamless fit of each state to a standard state boundary base.

Date: 08-Nov-2004 (process 4 of 10)
The following attributes were exported from Filemaker as a .dbf: orig_label, map_symbol2, unit_link, reference_id, unit_age, rocktype1, and rocktype2.
orig_label reflects the original map symbol used on the source map
map_symbol2 reflects map-symbol1 with the addition of a province number
unit_link is an auto generated field based on map-symbol2 and the state abbreviation (e.g. IN001) that produces a unique identifier for each map unit
reference_id was populated with an alphanumeric code (e.g. US001) that designates the source used for the linework and other references used to describe the age or lithologies of the unit.
unit_age was populated with general age assignment
rocktype1 records dominant lithology (must be >50% of unit), using standardized data dictionary
rocktype2 records second most dominant lithology, using standardized data dictionary
orig_label has the following field names from the source map:
GEOLCODE
The attributes were then converted using the following structure:
item name: orig_label width: 12 output: 12 type: c
item name: sgmc_label width: 16 output: 16 type: c
item name: unit_link width: 18 output: 18 type: c
item name: source width: 6 output: 8 type: c
item name: unit_age width: 60 output: 60 type: c
item name: rocktype1 width: 40 output: 40 type: c
item name: rocktype2 width: 40 output: 40 type: c

Date: 08-Nov-2004 (process 5 of 10)
Once the .dbf was in the correct format with standardized column widths and data structure, it was converted into a lookup table (.lut) in Arc/Info. Then a joinitem was performed to join the look-up table to the polygon attribute table. orig_label was used as the merge item.

Date: 08-Nov-2004 (process 6 of 10)
Next, in preparing the uniform .aat file, the following items were added to the table:
item name: arc-code width: 3 output: 3 type: i
item name: arc-para1 width: 3 output: 3 type: i
item name: arc-para2 width: 3 output: 3 type: i
item name: source width: 6 output: 8 type: c

Date: 09-Dec-2004 (process 7 of 10)
Arc-code was populated using the paper map source to tag the lines using the AAT line type data dictionary (see Chapter A in this series).
Arc-para1 was populated when additional information was available such as identifying the upthrown side of a fault or direction of thrusting on a fault. (see Chapter A)
Arc-para2 is a scratch field that is used mostly in Alaska.
Source was populated with an alphanumeric code (e.g. US001) that designates the source used for the linework.

Date: 21-Jan-2005 (process 8 of 10)
Once the .aat and the .pat were populated with the correct attributes, the coverage was exported as an .e00 file (gageol_lcc.e00).
Then it was unprojected into geographic coordinates and exported again (gageol_dd.e00).

Date: 21-Jan-2005 (process 9 of 10)
No faults for Georgia.

Date: 21-Jan-2005 (process 10 of 10)
Finally, the geology line and geology polygon coverages were converted into shapefiles; in both geographic coordinates and in Lambert Conformal Conic projection.
What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

How well have the observations been checked?
The values of the attributes ROCKTYPE1 and ROCKTYPE2 were assigned based on the information in the legends of the source maps (most of which are paper). The definitions of these values are described in the draft document Geologic Map Classification version 6.1 (Johnson and others); available at the following website: <http://geology.usgs.gov/dm>
How accurate are the geographic locations?
Accuracy of Georgia state boundary and those arcs intersecting it: The accuracy of the state boundary arcs is based on the 1:100,000 scale original data used to produce this boundary. (Johnson, Bruce R. and Leveritch, Beth, 1998, 1:100,000 Scale State Boundaries of the Conterminous United States: U.S. Geological Survey, unpublished (see metadata file: st100kmeta.txt, Chapter A))
Those internal arcs intersecting the state boundary were extended or shortened as needed to complete polygons, possibly creating a small amount of error.
How accurate are the heights or depths?
Where are the gaps in the data? What is missing?
Bodies of water are classified as water, and the geologic units underlying them are not included in this coverage.
How consistent are the relationships among the observations, including topology?
All internal polygons were checked for closure with vendor software and on hard copy plots. Overshoots and undershoots have been deleted or corrected as appropriate.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: none

Use_Constraints:
This database is not meant to be used or displayed at any scale other than 1:500,000.
Any hardcopies utilizing these data sets shall clearly indicate their source. If the licensee has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map. Licensee specifically agrees not to misrepresent these data sets, nor to imply that changes they made were approved by the U.S. Geological Survey.

Who distributes the data set? (Distributor 1 of 1)

U.S. Geological Survey Information Services Reston-ESIC
U.S. Geological Survey
507 National Center
Reston, Virginia 20192
USA

1-888-ASK-USGS or 1-703-648-5953 (voice)
<http://www.usgs.gov/contact/>
What's the catalog number I need to order this data set?
What legal disclaimers am I supposed to read?

Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the USGS. Although these data have been used by the USGS and have been successfully imported into data base programs, no warranty, expressed or implied, is made by the USGS as to how successfully or accurately the data can be imported into any specific application software running on any specific hardware platform. The fact of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in connection therewith. This data base GIS is not meant to be used or displayed at any scale other than 1:500,000.
How can I download or order the data?
- Availability in digital form:
  
  Data format: Geologic units and structural features in format ARC/INFO export (version 8.3)
  
  Network links: <http://pubs.usgs.gov/of/2005/1323>
- Cost to order the data: none

Data format:	Geologic units and structural features in format ARC/INFO export (version 8.3)
Network links:	<http://pubs.usgs.gov/of/2005/1323>

Who wrote the metadata?

Dates:: Last modified: 24-Jan-2005
Metadata author:: U.S. Geological Survey
Attn: Connie L. Dicken
12201 Sunrise Valley Dr. MS954
Reston, VA 20192
USA

703-648-6482 (voice)
cdicken@usgs.gov
Metadata standard:: Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <http://mrdata.usgs.gov/geology/state/metadata/ga.faq.html>

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