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Alaska geologic map units

Geologic units containing Sedimentary > Carbonate > Limestone

216 units contain this lithology

270 Fringing and fossil carbonate reefs
Pleistocene to Pleistocene, Sedimentary, carbonate
810 Tokun Formation
Eocene to Eocene, Sedimentary, shallow-marine-siliciclastic
950 Sedimentary rocks of the Orca Group, undivided
Paleocene to Eocene, Sedimentary, slope-and-deep-water
953 Orca Group: Dark-gray to black siltstone, mudstone, and minor fine-grained sandstone
Paleocene to Early-Eocene, Sedimentary, slope-and-deep-water
1530 Krugoli Formation, undifferentiated
Cretaceous to Tertiary-Paleogene, Undivided
1552 Basement rocks - fine-grained sedimentary rocks.
Cretaceous to Tertiary-Paleogene, Undivided
2100 Early Cretaceous Nelchina Limestone
Early-Cretaceous to Early-Cretaceous, Sedimentary, carbonate
2125 Quartz-carbonate sandstone and pebbly mudstone, Early Cretaceous, Valanginian-Aptian
Early-Cretaceous to Valanginian, Sedimentary, shallow-marine-siliciclastic
2150 Herendeen Formation or Limestone on some maps;
Valanginian to Barremian, Sedimentary, carbonate
2151 Limestone, Early Cretaceous(?), primarily Inoceramus prisms
Early-Cretaceous to Early-Cretaceous, Sedimentary, carbonate
2186 Coquina limestone of the Okpikruak Formation
Jurassic to Early-Cretaceous, Sedimentary, carbonate
2330 Andesitic volcanic rocks (earliest Cretaceous, Neocomian, but may include Albian)
Late-Jurassic to Early-Cretaceous, Extrusive
2820 Marine sedimentary rocks of Gravina-Nuzotin unit
Late-Jurassic to Berriasian, Sedimentary, slope-and-deep-water
2831 Marine volcaniclastic sandstone, conglomerate, and argillite apparently cut by dikes or shallow intrusions
Mesozoic to Mesozoic, Undetermined
2841 Yakutat Group, flysch facies
Jurassic to Cretaceous, Sedimentary, slope-and-deep-water
2850 Flysch sequence, Early Cretaceous and Late Jurassic
Jurassic to Cretaceous, Sedimentary, slope-and-deep-water
2851 Flysch sequence (Early Cretaceous and Late Jurassic
Late-Jurassic to Early-Cretaceous, Sedimentary, slope-and-deep-water
2852 Flysch sequence, Late Cretaceous to Late Jurassic (unit KJfl, HE002; KJm, MG002; KJs, TL002) [Overprint symbol 14]
Late-Jurassic to Cenomanian, Sedimentary, slope-and-deep-water
2971 Undifferentiated greenstone, metapelitic rocks, and metasandstone of the Gravina belt
Devonian to Cretaceous, Metamorphic, undivided
3030 Chinitna Formation, Tonnie Siltstone Member
Bathonian to Callovian, Sedimentary, shallow-marine-siliciclastic
3140 Chinitna Formation and Tuxedni Group, undivided
Middle-Jurassic to Late-Jurassic, Sedimentary, shallow-marine-siliciclastic
3186 Tuxedni Group, Red Glacier Formation
Bajocian to Bajocian, Sedimentary, deltaic-and-nearshore
3190 Kialagvik Formation [Kialagvik Fm. is similar to the lower upper part of the Tuxedni Group]
Toarcian to Bathonian, Sedimentary, shallow-marine-siliciclastic
3210 Tatina River volcanics, Upper member, phosphatic shale and volcaniclastic sandstone
Jurassic to Early-Cretaceous, Sedimentary, slope-and-deep-water
3220 Micaceous, fine-grained black graywacke, siltstone, and slate, and gritty limestone.
Early-Jurassic to Early-Jurassic, Extrusive
3280 Younger strata of the Porcupine River sequence, undivided
Mississippian to Jurassic, Sedimentary, carbonate
3820 McCarthy Formation, argillite and impure limestone (Early Jurassic-Late Triassic)
Carnian to Pliensbachian, Sedimentary, shallow-marine-siliciclastic
3821 Limestone, shale, and chert (Early Jurassic(?)-Late Triassic (Norian)); newly recognized unit in Taylor Mtns.
Norian to Early-Jurassic, Sedimentary, slope-and-deep-water
3830 Red and brown sedimentary rocks and basalt (Early Jurassic-Late Triassic)
Late-Triassic to Early-Jurassic, Sedimentary, continental
3850 Crystal tuff, argillite, chert, graywacke, and limestone, deep marine, Late Jurassic to Late Triassic(?)
Late-Triassic to Late-Jurassic, Extrusive
3851 Crystal tuff, argillite, chert, graywacke, and limestone, deep marine, Late Jurassic to Late Triassic(?), thought largely Triassic
Carboniferous to Early-Jurassic, Extrusive
3950 Calcareous schist and phyllite
Permian to Triassic, Sedimentary, carbonate
4011 Triassic limestone, shale, and chert
Norian to Norian, Sedimentary, carbonate
4012 Fossiliferous limestone from the northeast Taylor Mountains quadrangle
Late-Triassic to Late-Triassic, Sedimentary, carbonate
4015 Shublik Formation, black shale, sandstone, and silty limestone. Possibly equivalent to lower Glenn Shale [4034]
Middle-Triassic to Late-Triassic, Sedimentary, shallow-marine-siliciclastic
4016 Karen Creek Sandstone and Shublik Formation, undivided
Triassic to Triassic, Sedimentary, shallow-marine-siliciclastic
4017 Shublik and Siksikpuk Formations, undivided
Permian to Triassic, Undivided
4019 Port Graham Formation of Kelley (1980)
Late-Triassic to Late-Triassic, Undivided
4020 Kamishak Formation [includes some volcanic rocks]
Norian to Toarcian, Sedimentary, carbonate
4021 Limestone and basalt sequence, Late Triassic, Norian
Norian to Norian, Undivided
4022 Ursus Member, Kamishak Formation
Late-Triassic to Late-Triassic, Sedimentary, carbonate
4023 Middle Member, Kamishak Formation
Norian to Norian, Sedimentary, slope-and-deep-water
4024 Bruin Limestone Member, Kamishak Formation
Norian to Norian, Sedimentary, carbonate
4029 Upper Triassic limestone, might not be Chitistone -- Nizina equivalent
Late-Triassic to Late-Triassic, Sedimentary, carbonate
4030 Chitistone and Nizina Limestone units, undivided
Carnian to Norian, Sedimentary, carbonate
4032 Spiculite and sandy limestone, Late Triassic, Norian (Trs, MD002) [Overprint symbol 708]
Norian to Norian, Sedimentary, shallow-marine-siliciclastic
4033 Calcareous sedimentary rocks, Late Triassic, middle(?) Norian and Late Karnian
Triassic to Late-Triassic, Sedimentary, carbonate
4034 Glenn Shale, lower unit, Late and Middle Triassic. Possibly equivalent to Shublik Formation [4015]
Triassic to Triassic, Sedimentary, shallow-marine-siliciclastic
4035 Limestone, chert and some greenstone
Triassic to Triassic, Undivided
4080 Calcareous phosphatic shale and limestone [probably correlative with lower part of Glenn Shale]
Triassic to Triassic, Sedimentary, carbonate
4110 Otuk Formation, Triassic
Triassic to Middle-Jurassic, Sedimentary, slope-and-deep-water
4120 Siksikpuk Formation, Etivluk Group, chert and shale
Pennsylvanian to Triassic, Sedimentary, slope-and-deep-water
4140 Stikine terrane limestone, sandy limestone, and mudstone
Triassic to Triassic, Sedimentary, carbonate
4170 Early Trissic limestone of Chulitna region
Early-Triassic to Early-Triassic, Sedimentary, carbonate
4235 Povas unit of Yukon, andesitic basalt flows, breccia, tuff, sandstone and argillite; local dacitic breccia and tuff with minor limestone; greenschist, chlorite schist, chlorite-augite-feldspar gneiss, amphibolite
Triassic to Carnian, Undivided
4420 Nikolai Greenstone, Late and/or Middle Triassic
Anisian to Norian, Extrusive
4425 Cottonwood Bay Greenstone
Triassic to Triassic, Extrusive
4470 Hyd Group, undivided
Late-Triassic to Late-Triassic, Undivided
4471 Hyd Group, including Chapin Peak Formation marine volcanic rocks and subordinate calcareous sedimentary rocks
Late-Triassic to Late-Triassic, Extrusive
4473 Hyd Group limestone and dolomite
Late-Triassic to Late-Triassic, Sedimentary, carbonate
4474 Hyd Group felsic volcanic rocks, includes Puppets Formation on Gravina Island
Late-Triassic to Late-Triassic, Extrusive
4475 Hyd Group argillite
Triassic to Triassic, Sedimentary, slope-and-deep-water
4500 Mafic metavolcanic rocks, metamorphosed intermediate to mafic volcanic flows, pillowed flows, tuff, and agglomerate, with subordinate pelitic and semipelitic flysch. (Alava)
Triassic to Triassic, Extrusive
4710 Togiak-Tikchik Complex, formerly Gemuk Group, chiefly siltstone and lesser chert and volcanic rocks
Mississippian to Cretaceous, Undivided
4712 Limestone in undivided Gemuk Group, chiefly siltstone and lesser chert and volcanic rocks
Mississippian to Cretaceous, Sedimentary, carbonate
5000 Etivluk Group, undivided: Includes Siksikpuk, Otuk Formations and underlying Immaitchiak Chert and consists of maroon, red, green, gray, black, and variegated chert and siliceous argillite, minor maroon calcareous siltstone and argillite, and rare maroon or gray limestone lenses.
Pennsylvanian to Early-Jurassic, Sedimentary, slope-and-deep-water
5003 Sandstone, shale, argillaceous limestone, limestone, dolostone, mudstone, chert and siltstone in north-central Wiseman quadrangle. The unit conformably overlies the Kanayut Conglomerate of the Endicott Group. Consists of Kayak Shale of the Endicott Group, Lisburne Group, and Siksikpuk Formation and Otuk Formation of the Etivluk Group.
Carboniferous to Jurassic, Sedimentary, undivided
5004 Sedimentary rocks: Includes: Shublik and Otuk Formations - Black shale, siltstone, limestone, and black chert; Sadlerochit Group - black shale, and bluff calcareous siltstone; Siksikpuk Formation - black, red, and green shale and siltstone; buff calcareous siltstone; Lisburne Group - gray cherty limestone, black chert, and shale; Kayak Shale - black shale and limestone; Kekiktuk Conglomerate - quartzite, conglomerate, and felsic volcaniclastic interlayers
Devonian to Triassic, Undivided
5010 Carbonaceous shale, mudstone, and graywacke; subordinate limestone, chert, conglomerate, and mafic volcanic rocks; minor felsic volcanic rocks; and the metamorphosed and deformed equivalents
Permian to Early-Cretaceous, Undivided
5012 Dark gray, phyllitic, siliceous to carbonaceous argillite and shale, subordinate chert-rich conglomerate, chert, volcaniclastic rocks, highly calcareous argillite or limestone, and minor intrusive rocks.
Permian to Triassic, Undivided
5020 Formerly Rampart Group, sedimentary rocks, now considered Tozitna -- Triassic to Mississippian
Mississippian to Early-Jurassic, Undivided
5035 Lower unit Glenn shale and Tahkandit Limestone, undivided
Permian to Triassic, Undivided
5036 Sedimentary rocks of the Tatonduk area, undivided. Ranges through entire Paleozoic, diverse lithologies, many formal units lumped
Cambrian to Permian, Undivided
5040 Flysch-like sedimentary rocks
Carboniferous to Triassic, Sedimentary, slope-and-deep-water
5060 Marine sandstone, shale, limestone and conglomerate
Devonian to Cretaceous, Sedimentary, shallow-marine-siliciclastic
5070 White-weathering chert or silicified limestone
Paleozoic to Mesozoic, Undetermined
5090 Melange and argillaceous melange, Goodnews terrane
Paleozoic to Mesozoic, Melange
5110 Chulitna Sequence -- volcanic and sedimentary rocks, Early Triassic to late Paleozoic
Late-Devonian to Early-Triassic, Undivided
5111 Chert, volcanic rocks, metasandstone, and limestone
Mississippian to Triassic, Undivided
5213 Metasedimentary, metavolcanic, and sedimentary rocks of the Doonerak area (Other maps show as NSA 5565 and 6685)
Paleozoic to Triassic, Undivided
5235 Melange-like assemblage of mafic volcanic rocks, chert, mudstone, argillite, graywacke and limestone
Mississippian to Early-Cretaceous, Extrusive
5250 Metamorphosed igneous rocks, post-Carboniferous
Permian to Mesozoic, Metamorphic, undivided
5255 Porcupine slate of southeast Alaska (uPzs, SK004)
Devonian to Triassic, Sedimentary, marine, shallow to deep association, undivided
5310 Dillinger stratigraphic sequence, undivided; sedimentary rocks of Dillinger River, lime mudstone and shale, etc, Paleozoic
Cambrian to Givetian, Sedimentary, slope-and-deep-water
5330 Limestone and chert
Mississippian to Permian, Sedimentary, carbonate
5340 Carbonates, early Paleozoic
Neoproterozoic to Paleozoic, Sedimentary, carbonate
5341 Limestone?, Permian-Pennsylvanian?
Pennsylvanian to Permian, Sedimentary, carbonate
5360 Clastic rocks, undivided, Paleozoic(?)
Carboniferous to Paleozoic, Undivided
5370 Mystic and Dillinger stratigraphic sequences, undivided (Triassic to Ordovician), undivided sedimentary rocks, typically flysoid
Paleozoic to Paleozoic, Undivided
5525 Marble, Paleozoic
Cambrian to Mississippian, Sedimentary, carbonate
5620 Slana Spur Formation, marine calcareous and noncalcareous volcaniclastic rocks, Early Permian-Middle Penn.
Pennsylvanian to Cisuralian, Undivided
5621 Slana Spur Formation, calcareous volcaniclastic rocks, Early Permian-Middle Penn.
Pennsylvanian to Cisuralian, Undivided
5715 Sadlerochit Group, Echooka Formation, undivided [NOTE: may be equivalent to NSA 5710, Permian sedimentary rocks in Charley River quadrangle and 5735, Tahkandit Limestone]
Permian to Permian, Undivided
5716 Sadlerochit Group, Permian limestone, Joe Creek unit (TrPsl, TB003)
Permian to Permian, Sedimentary, carbonate
5720 Argillite and limestone
Permian to Cisuralian, Undivided
5725 Shale and chert, Strangle Woman and Christian River sequences
Permian to Permian, Sedimentary, slope-and-deep-water
5730 Unnamed Permian limestone
Permian to Permian, Sedimentary, carbonate
5735 Tahkandit Limestone, massive bioclastic limestone [NOTE: may be equivalent to NSA 5710, Permian sedimentary rocks in Charley River quadrangle and 5715, Echooka Formation]
Permian to Permian, Sedimentary, carbonate
5737 Tahkandit Limestone, massive bioclastic limestone and Step Conglomerate, Permian, chert and quartzite clast pebble- and cobble conglomerate, undivided
Permian to Permian, Undivided
5740 Argillite, sandstone, sandy limestone, and minor conglomerate
Permian to Permian, Undivided
5750 Hasen Creek Formation
Cisuralian to Cisuralian, Undivided
5755 Limestone of the Hasen Creek Formation
Cisuralian to Cisuralian, Sedimentary, carbonate
5756 Limestone of the Eagle Creek Formation
Cisuralian to Cisuralian, Sedimentary, carbonate
5765 Pybus Formation, limestone and dolostone
Permian to Cisuralian, Sedimentary, carbonate
5766 Halleck Formation calcareous siltstone to conglomerate
Artinskian to Kungurian, Undivided
5767 Sitth-gha-ee Peak Formation Limestone (Psl, SK010)
Permian to Permian, Sedimentary, carbonate
5932 Cannery Formation, carbonaceous facies, slate and black phyllite
Devonian to Permian, Metamorphic, undivided
6000 Pennsylvanian, Mississippian, Devonian, light gray limestone
Devonian to Pennsylvanian, Sedimentary, carbonate
6020 Calico Bluff Formation
Late-Mississippian to Early-Pennsylvanian, Sedimentary, undivided
6021 Calico Bluff and Ford Lake Shale, undivided
Late-Devonian to Early-Pennsylvanian, Sedimentary, undivided
6030 Crinoidal limestone
Pennsylvanian to Pennsylvanian, Sedimentary, carbonate
6040 Lisburne Group, Wahoo Limestone, uppermost unit in eastern Alaska
Mississippian to Mississippian, Sedimentary, carbonate
6045 Lisburne Group Wahoo and Alapah Limestone units, undivided. Northeastern Alaska (PaMl, DP002; DP004; ML002; PaMlu, AC002; PS002; Cl, TB002)
Late-Mississippian to Middle-Pennsylvanian, Sedimentary, carbonate
6080 Chert and limestone, chiefly chert, Penn and Miss
Late-Devonian to Triassic, Sedimentary, slope-and-deep-water
6085 Lisburne Group, Alapah Limestone (Ma, ML006)
Late-Mississippian to Middle-Pennsylvanian, Sedimentary, carbonate
6086 Lisburne Group, Akmalik Chert
Mississippian to Early-Pennsylvanian, Sedimentary, slope-and-deep-water
6090 Nuka Formation
Mississippian to Pennsylvanian, Undivided
6095 Saginaw Bay Formation, unit to be abandoned
Devonian to Pennsylvanian, Undivided
6200 Lisburne Group, Kuna Formation, also includes black carbonaceous metachert, quartzite, and siliceous or calcareous phyllite, commonly distinctive silvery blue (phosphatic) bloom on weathered surfaces
Mississippian to Pennsylvanian, Sedimentary, slope-and-deep-water
6315 Lisburne Group, Tupik Formation, uppermost unit in western Alaska
Mississippian to Mississippian, Sedimentary, slope-and-deep-water
6320 Lisburne Group, Kogruk Formation (uppermost?) Fossiliferous limestone, Miss.
Mississippian to Mississippian, Sedimentary, slope-and-deep-water
6325 Lisburne Group, undivided
Mississippian to Mississippian, Sedimentary, carbonate
6326 Lisburne Group, informal lower part
Early-Mississippian to Late-Mississippian, Sedimentary, carbonate
6327 Lisburne Group, Nasorak Formation
Late-Mississippian to Late-Mississippian, Sedimentary, carbonate
6328 Lisburne Group and Kayak Shale, undivided
Mississippian to Pennsylvanian, Undivided
6330 Endicott Group, Kayak Shale
Mississippian to Visean, Sedimentary, slope-and-deep-water
6335 Younger limestones of Mystic stratigraphic sequence (Mississippian)
Late-Mississippian to Late-Mississippian, Sedimentary, carbonate
6340 Iyoukeen and Peratrovich Formations, limestone, black chert, and black shale
Mississippian to Mississippian, Sedimentary, carbonate
6375 Endicott Group, Kayak Shale and Kanayut Conglomerate
Late-Devonian to Visean, Undivided
6380 Lisburne Group, Utukok Formation - Limestone, Mississippian to Devonian
Frasnian to Visean, Sedimentary, carbonate
6400 Limestone and tuff
Mississippian to Mississippian, Undivided
6610 Algal boundstone in SW Alaska
Ludlow to Pridoli, Sedimentary, carbonate
6615 Thin-bedded limestone
Ordovician to Devonian, Sedimentary, carbonate
6616 Point Augusta Formation limestone horizon within turbidite deposits
Silurian to Silurian, Sedimentary, slope-and-deep-water
6617 Heceta Limestone, reefoid limestone
Silurian to Silurian, Sedimentary, carbonate
6618 Polymictic conglomerate and olistostrome deposits associated with Silurian turbibidites and reefs
Silurian to Silurian, Sedimentary, slope-and-deep-water
6619 Silurian turbidite deposits including the Bay of Pillars Formation, Point Augusta and Tidal Formation and related units
Silurian to Silurian, Sedimentary, slope-and-deep-water
6620 Paradise Fork Formation and correlative units
Llandovery to Wenlock, Sedimentary, slope-and-deep-water
6625 Middle Silurian limestone
Wenlock to Ludlow, Sedimentary, carbonate
6631 Staney Creek sandstone, limestone and dolostone, shallow water facies rocks
Silurian to Early-Devonian, Sedimentary, carbonate
6640 Micaceous calc-sandstone
Silurian to Silurian, Undivided
6660 Terra Cotta Mountains sandstone, sandstone and graptolitic shale
Silurian to Silurian, Sedimentary, slope-and-deep-water
6680 Amy Creek unit, siliceous dolomite, chert, and basaltic greenstone, minor limestone, shale..., Silurian(?) to Late Proterozoic
Neoproterozoic to Silurian, Undivided
6686 Black phyllite and metalimestone
Silurian to Silurian, Metamorphic, undivided
6691 Descon Formation limestone
Ordovician to Silurian, Sedimentary, carbonate
6692 Descon Formation conglomerate
Ordovician to Llandovery, Sedimentary, shallow-marine-siliciclastic
6712 Descon Formation, basaltic to andesitic volcanic rocks
Silurian to Silurian, Extrusive
6900 Endicott Group, Noatak Sandstone and phyllite, carbonate and clastic rocks of the Nakolik River, shale,
Devonian to Devonian, Sedimentary, shallow-marine-siliciclastic
6926 Wacke members of Hunt Fork Shale and Beaucoup Formation, undivided (Dbw, AC002; Dbw, Dhbw, PS002; Dbcp, CH006)
Late-Devonian to Late-Devonian, Sedimentary, undivided
6927 Beaucoup Formation, carbonaceous, siliceous, and calcareous sedimentary rocks and felsic volcanic rocks that grade downward and to the southwest into Skajit Limestone. Laterally equivalent to Whiteface Mountain and Ambler volcanic and sedimentary rocks
Middle-Devonian to Late-Devonian, Undivided
6928 Port Refugio Formation
Devonian to Devonian, Undivided
6929 Late Devonian thin-bedded limestone
Late-Devonian to Late-Devonian, Sedimentary, carbonate
6930 Limestone, Late Devonian
Devonian to Devonian, Sedimentary, carbonate
6931 Carbonate rocks of the lower part of the Mystic stratigraphic sequence (Devonian and Silurian)
Ordovician to Devonian, Sedimentary, carbonate
6932 Wadleigh Limestone
Devonian to Devonian, Sedimentary, carbonate
6933 Black Cap Limestone and Cedar Cove limestone member
Middle-Devonian to Late-Devonian, Sedimentary, carbonate
6936 Cedar Cove Formation
Devonian to Devonian, Undivided
6938 Kassan Limestone, part of Karheen
Devonian to Middle-Devonian, Sedimentary, carbonate
6940 Cascaden Ridge, Beaver Bend combined correlative units, shale, siltstone, sandstone, conglomerate, and minor limestone, Middle Devonian
Devonian to Devonian, Sedimentary, shallow-marine-siliciclastic
6944 Limestone (Late Devonian to mid-Silurian)
Devonian to Devonian, Sedimentary, carbonate
6945 Schwatka unit -- Limestone and Ogilvie Formation of Clough (1980), Middle and Early Dev.
Devonian to Devonian, Sedimentary, carbonate
6951 Beaucoup Formation, dark gray to orange weathering limestone (see also 7360)
Silurian to Devonian, Undivided
6952 Barren Ridge limestone, calcarenite, calcareous siltstone, and limestone
Silurian to Devonian, Sedimentary, carbonate
6955 Lost Creek unit, lime mudstone and wackestone, Devonian and Silurian
Silurian to Devonian, Undivided
6956 Limestone, dolomite, greenstone, and chert
Silurian to Devonian, Undivided
6957 Laminated limestone, sandstone, and siltstone
Silurian to Devonian, Sedimentary, slope-and-deep-water
6960 Whirlwind Creek Formation and unnamed correlative units (Late Devonian, Frasnian through mid-Silurian, Wenlockian), reefy limestone and dolomite
Ludlow to Eifelian, Sedimentary, carbonate
6962 Berg Mountain Formation Limestone. Associated with volcanic rocks of Berg Mountain Formation (NSA = 7022). Also Kennel Creek Limestone
Silurian to Devonian, Sedimentary, carbonate
6965 Tolovana Limestone, Middle Devonian to Early(?) Silurian,
Silurian to Middle-Devonian, Sedimentary, carbonate
6966 Limestone, greenstone, and schist
Ordovician to Devonian, Undivided
6976 McCann Hill Chert and Road River Formation, undivided
Ordovician to Devonian, Sedimentary, slope-and-deep-water
6980 Baird Group; Massive light gray reefoid limestone and dolomite with local thin interbeds of calcareous phyllite
Silurian to Devonian, Sedimentary, carbonate
6981 Baird Group, Kugururok Formation (limestone)
Late-Devonian to Late-Devonian, Sedimentary, carbonate
6982 Baird Group, Eli Limestone
Middle-Devonian to Late-Devonian, Sedimentary, carbonate
6983 Baird Group, Skajit Limestone
Ordovician to Devonian, Sedimentary, carbonate
6990 Road River Formation, Hillard Limestone and other units, undivided
Cambrian to Devonian, Undivided
6991 Road River Formation
Early-Ordovician to Early-Devonian, Sedimentary, slope-and-deep-water
6995 Thin-bedded to massive, fine-grained, limestone with local interbedded tuff and mafic volcanic rocks
Ordovician to Devonian, Sedimentary, carbonate
7015 Woodchopper Volcanics, amygdaloidal basalt, pillow basalt, ..., equivalent to Schwatka unit?
Early-Devonian to Late-Devonian, Extrusive
7020 Freshwater Bay Formation and Kasaan Island Volcanics, Basalt and rhyolite with subordinate sedimentary rocks, Middle to Late Devonian
Late-Devonian to Late-Devonian, Extrusive
7210 Nanook Limestone, Thin- to thick-bedded limestone, silicified limestone, and vuggy dolomite with minor amounts of siltstone and shale. Includes Mount Copleston Limestone which is now Devonian part of unit, Nanook now considered Ordovician and older.
Ediacarian to Devonian, Sedimentary, carbonate
7510 Tcherskidium-bearing limestone
Late-Ordovician to Late-Ordovician, Sedimentary, carbonate
7515 Brown and gray 'chippy' shale, silty shale and silicified limestone
Ordovician to Ordovician, Sedimentary, shallow-marine-siliciclastic
7520 Novi Mountain and Telsitna Formations, and unnamed correlative units, massive dolomite and limestone, Late to Middle Ordovician
Middle-Ordovician to Late-Ordovician, Sedimentary, carbonate
7525 Jones Ridge Limestone, massive oolitic, typically silicified limestone
Cambrian to Ordovician, Sedimentary, carbonate
7530 Hillard Limestone
Cambrian to Early-Ordovician, Sedimentary, carbonate
7535 Limestone and dolomitic limestone
Late-Ordovician to Silurian, Sedimentary, carbonate
7540 Nome Complex, pink to light gray weathering, gray to tan fine-grained dolostone with distinct color mottling
Ordovician to Ordovician, Sedimentary, carbonate
7555 Argillaceous limestone and limestone (Oal, TE002; TE004)
Early-Ordovician to Early-Ordovician, Sedimentary, carbonate
7560 Algal boundstone and lime mudstone
Ordovician to Early-Ordovician, Sedimentary, carbonate
7565 Limestone and dolomitic limestone
Proterozoic to Ordovician, Sedimentary, carbonate
7575 Sandstone, siltstone, and limestone, York terrane (OZt, TE004; SEWPEN)
Neoproterozoic to Ordovician, Sedimentary, slope-and-deep-water
7580 Post River Sandstone and Lyman Hills Formations and correlative units, silty limestone and siltstone, Early Ordovician
Cambrian to Silurian, Sedimentary, slope-and-deep-water
7591 Broken Skull, Dolomite succession with local basal quartzite and red bed member
Middle-Cambrian to Ordovician, Sedimentary, carbonate
7610 Fossil Creek Volcanics, undivided -- Alkali basalt, agglomerate, and volcaniclastic conglomerate
Ordovician to Ordovician, Undivided
7620 Andesitic to basaltic volcaniclastic rocks and local tuffaceous phyllite, gabbro, and diabase, and black phyllite
Cambrian to Ordovician, Extrusive
7710 Ordovician chert, including Livengood Dome Chert, chert, siliceous slate and rare greenstone and limestone, Late Ordovician (protolith)
Ordovician to Ordovician, Sedimentary, slope-and-deep-water
7711 Limestone marker bed within Livengood Dome Chert
Ordovician to Ordovician, Sedimentary, carbonate
7971 Quartzite and argillite
Neoproterozoic to Early-Cambrian, Sedimentary, slope-and-deep-water
7980 Funnel Creek Limestone
Early-Cambrian to Early-Cambrian, Sedimentary, carbonate
7990 Tindir Group, undivided, Early Cambrian and Late Proterozoic argillite, quartzite, dolomite, dolo-arenite...
Neoproterozoic to Cambrian, Mixed volcanic and sedimentary rocks
7992 Upper Tindir Group, limestone, Early Cambrian
Early-Cambrian to Early-Cambrian, Sedimentary, carbonate
8000 Wickersham unit -- Limestone, Early Cambrian and Late Proterozoic
Neoproterozoic to Early-Cambrian, Sedimentary, carbonate
8005 Avalanche, light grey, buff, yellow, and orange weathering, crypto grained dolomite, silty dolomite, dolomitic siltstone and dolomitic mudstone
Cambrian to Cambrian, Sedimentary, carbonate
8007 Rockslide, platy calcareous shale and silty, dark grey fine- to crypto-grained limestone; minor thin beds of light brown to grey weathering platy dark crypto-grained limestone and rare bands of buff dolomite
Cambrian to Cambrian, Sedimentary, carbonate
8010 Hyland Group, consists upwards of coarse turbiditic clastics, limestone, and fine clastics typified by maroon and green shale; includes scattered mafic volcanic rocks
Neoproterozoic to Ordovician, Sedimentary, slope-and-deep-water
8012 Neruokpuk, fine to coarse sandstone, grit and pebble conglomerate, poorly sorted, turbiditic, locally feldspathic; siltstone and slaty argillite interbeds; local maroon, green and Oldhamia bearing slate in upper part
Neoproterozoic to Ordovician, Sedimentary, slope-and-deep-water
8013 Sedimentary rocks, undivided
Neoproterozoic to Cambrian, Sedimentary, undivided
8014 Medium- to thick-bedded, commonly light-gray to dark-gray lime mudstone
Middle-Cambrian to Middle-Cambrian, Sedimentary, carbonate
8015 Middle or lower Cambrian thin-bedded platy limestone associated with coarse-grained silciclastic sandstone and granule conglomerate, possible shale
Early-Cambrian to Middle-Cambrian, Sedimentary, carbonate
8340 Undivided shallow marine carbonate units of Holitna Basin area, late Proterozoic to Devonian
Cambrian to Devonian, Sedimentary, carbonate
8440 Sedimentary and igneous rocks corresponding to the Livengood sequence of Weber and others (1992)
Neoproterozoic to Devonian, Metamorphic, undivided
8441 Sedimentary and igneous rocks corresponding to the Fairbanks-White Mountains sequence of Weber and others (1992)
Neoproterozoic to Mississippian, Metamorphic, undivided
8442 Sedimentary and igneous rocks corresponding to older parts of the Schwatka-Rampart area sequence of Webber and others (1992)
Neoproterozoic to Devonian, Metamorphic, undivided
9011 Lower Tindir Group, dolomite, dolomitic limestone, and limestone
Neoproterozoic to Neoproterozoic, Sedimentary, carbonate
9012 Lower Tindir Group, stromatolitic limestone
Neoproterozoic to Neoproterozoic, Sedimentary, carbonate

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