Douglas B. Stoeser Gregory N. Green Laurie C. Morath William D. Heran Anna B. Wilson David W. Moore Bradley S. Van Gosen 2005 version 1.0 map U.S. Geological Survey Open-File Report 2005-1351 Denver, CO U.S. Geological Survey http://pubs.usgs.gov/of/2005/1351/ Douglas B. Stoeser Gregory N. Green Laurie C. Morath William D. Heran Anna B. Wilson David W. Moore Bradley S. Van Gosen 2005 version 1.0 map U.S. Geological Survey Open-File Report 1351 Reston, VA U.S. Geological Survey http://pubs.usgs.gov/of/2005/1351/ This open-file 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 geo- environmental 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. 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. 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). 2005 publication date Complete none planned -94.10 -88.70 33.10 28.80 none geology none USA Louisiana National Geologic Map Database Catalog themes, augmented 3100 - Vector 3110 - ESRI 3112 - export 1100 - Geology 1101 - General Augmented FIPS 10-4 and FIPS 6-4, version 1.0 US22 = Louisiana none 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. Gregory N. Green U.S. Geological Survey mailing and physical address

MS 973, USGS, Denver Federal Center

Denver CO 80225 USA 303-236-5390 ggreen@usgs.gov State Geologic Map Compilation (SGMC) activity of the National Surveys and Analysis projects of the US Geological Survey Mineral Resources Program. ARC/INFO version 8.3 ArcView 3.2 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 ) 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. Bodies of water are classified as water, and the geologic units underlying them are not included in this coverage. The geologic map was digitized from compilations ranging in scale from 1:1,000,000 to 1:100,000 and is an accurate representation of the source maps. It is intended to be used at scales ranging from 1:1,000,000 to 1:500,000. Display at significantly larger scales may produce small errors in locations of contacts or faults relative to features contained in other data sets. Accuracy of Louisiana state boundary and those arcs intersecting it: The accuracy of the state boundary arcs is based on the 1:100000 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. United States Geological Survey, Biological Research Division's, National Wetlands Research Center 1998 map Product Id USGS-NWRC 1984-02-0001 Lafayette, Louisiana, United States United States Geological Survey, Biological Resources Division's, National Wetlands Research Center http://www.nwrc.usgs.gov/ 5000000 online 1998 publication date LA001 Digital geologic map of the state of Louisiana Gregory N. Green 2005 map U.S. Geological Survey Open-File Report 2005-1351 Denver, CO U.S. Geological Survey http://pubs.usgs.gov/of/2005/1351/ 5000000 online 2005 publication date LA002 Digital geologic map of the state of Louisiana, fault layer Bruce R. Johnson vector digital data unpublished material 100,000 online 199808 unknown US001 Provided linework for state boundaries Bruce R. Johnson unpublished material document online; http://geology.usgs.gov/dm unknown unknown Johnson Lith Class 6.1 Classification scheme used for lithology. 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. 2003 - 2004 G.N. Green obtained the digital geologic map of Louisiana from the website: http://www.nwrc.usgs.gov/ 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: 0.000 false northing: 0.000 All attributes were deleted except GEOLOGY_CODE. (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 GEOLOGY_CODE where then calculated into a new field called ORIG_LABEL. 20040402 The following attributes were exported from Filemaker as a comma delimited file map_symbol1 map_symbol2 unit_link reference_id unit_age rocktype1 rocktype2 The attributes were then loaded into INFO with the following structures: 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 20040404 Once the .csv was loaded, it was joined in Arc/Info with the joinitem command. orig_label as the related item. 20040404 Once the .pat file was correct, the .aat file was addressed. 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 20040405 Arc-code was populated using the digital map source to tag the lines using the AAT line type data dictionary. Arc-para1 was populated when additional information was available such as upthrown side of a fault or angle of thrusting on a fault. Arc-para2 is a scratch field that is used mostly in Alaska. Source was populated with code that designates the source used for the linework; typically the paper map. 20040405 Vector Lambert Conformal Conic 33 45 -100.0 0 0.00000 0.00000 coordinate pair 0.01 0.01 Meters North American Datum of 1927 Clarke 1866 6378206.4 294.98 la_geol.pat Polygon attribute table for the Louisiana geologic coverage. ESRI orig_label unmodified map unit symbol from source cover. Doug Stoeser Qal ALLUVIUM Qnl NATURAL LEVEES Qdf DELTA PLAIN, FRESH MARSH Qds DELTA PLAIN, SALINE MARSH Qcf CHENIER PLAIN, FRESH MARSH Qcs CHENIER PLAIN, SALINE MARSH Qtd DEWEYVILLE TERRACE Qbs BRAIDED STREAM TERRACES Qtp PRAIRIE TERRACES Qti INTERMEDIATE TERRACES Qth HIGH TERRACES MIIfb BLOUNTS CREEK MEMBER OF FLEMING FM MIfcc CASTOR CREEK MEMBER OF FLEMING FM MIfw WILLAMSON CREEK MEMBER OF FLEMING FM MIfd DOUGH HILLS MEMBER OF FLEMING FM MIfcb CARNAHAN BAYOU MEMBER OF FLEMING FM MIfl LENA MEMBER OF FLEMING FM OGc CATAHOULA FM OGv VICKBURG GROUP (UNDIFFERENTIATED) EOj JACKSON GROUP (UNDIFFERENTIATED) EOcf COCKFIELD FM EOcm COOK MOUNTAIN FM EOcs SPARTA FM EOcr CANE RIVER FM PNEOw WILLCOX GROUP (UNDIFFERENTIATED) PNm MIDWAY GROUP (UNDIFFERENTIATED) Ku UPPER CRETACEOUS sgmc_label sgmc_label = orig_label + ;n where n= province number (n=0 if no province) Doug Stoeser unit_link composite map label = ST + sgmc_label This creates a unique identifier for every unit in the CONUS (continental United States) covers. Doug Stoeser source reference to the source used Doug Stoeser LA001 United States Geological Survey, Biological Research Division's, National Wetlands Research Center, 1998, Overlay of the Geologic Map of Louisiana, Geographic NAD83, NWRC (1998) [geology], U.S. Geological Survey online at http://www.nwrc.gov/sdms/data unit_age The geologic age from the source map used. Doug Stoeser Quaternary geologic age Miocene geologic age Oligocene geologic age Eocene geologic age Paleocene geologic age Cretaceous geologic age rocktype1 The predominant lithology found in the formation. unit classification clay mudstone shale silt siltstone sand sandstone limestone indeterminate water rocktype2 The second most predominant lithology in the formation. unit classification clay coal marl peat sand sandstone silt siltstone la_geol.aat Arc attribute table for Louisiana geologic coverage. ESRI arc-code Unique identifier for the line feature AAT data dictionary, Appendix H 1 contact, location certain 7 shoreline or riverbank 124 state boundary arc-para1 Used for "decorated" lines where additional information is needed. AAT data dictionary 0 no additional information 1 for normal faults, upthrown side is to the right arc-para2 "Scratch" field used mostly in Alaska. AAT data dictionary 0 no additional information source A coded reference citation indicating source material used. AAT data dictionary LA001 United States Geological Survey, Biological Research Division's, National Wetlands Research Center, 1998, Overlay of the Geologic Map of Louisiana, Geographic NAD83, NWRC (1998) [geology], U.S. Geological Survey online at http://www.nwrc.gov/sdms/data 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) 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 ESRI U.S. Geological Survey Information Services mailing and physical address

U.S. Geological Survey 507 National Center

Reston Virginia 20192 USA 1-888-ASK-USGS or 1-703-648-5953 http://www.usgs.gov/contact/ This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey (USGS) editorial standard nor with the North American stratigraphic codes. 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. USGS OFR 2005-1351 ARC/INFO export 8.3 Geologic units and structural features gzip and tar http://pubs.usgs.gov/of/2005/1351 none 20041029 20041020 U.S. Geological Survey Gregory N. Green mailing and physical address

MS 973, USGS, Denver Federal Center

Denver CO 80225 USA 1-303-236-5390 ggreen@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998