OBJECTID|DescriptionOfMapUnits_ID|Category|Type|Symbol|Label|MapUnit|Name|FullName|Age|AgeType|AgeOldest|AgeYoungest|Description|HierarchyKey|ParagraphStyle|AreaFillRGB|AreaFillPatternDescription|GeoMaterialDictID|GeoMaterial|GeoMaterialConfidence|Notes|DataSourceMethod|DescriptionSourceID|created_user|created_date|last_edited_user|last_edited_date|GlobalID
|1|{756A1F4B-1FBF-4612-AF30-145ADEBD5A65}|map unit|map unit, generic|42A0|*q|IPq|Quadrant Formation|Quadrant Formation|Pennsylvanian|unprovided|Pennsylvanian|Pennsylvanian|White to light yellowish brown, fine-grained, vitreous, quartz sandstone. Beds are mostly thick to massive, locally with faint cross-laminations. Near fault zones forms a tan to red quartzite cemented breccia with angular pebble- to cobble-sized clasts of white to tan quartzite. Thickness approximately 283 m (930 ft) in the Twin Adams quadrangle to the immediate west (Sharp, 1970).|19|dmu, map unit|153,204,235||{58AA9A01-133F-46B5-A023-A044212E1BD3}|Sandstone|high||997|DAS01 | DAS14|||SPARKER1|2022-07-08 21:01:04|{756A1F4B-1FBF-4612-AF30-145ADEBD5A65}
2|{C2109E76-A904-4ED5-9CBF-701744ECB405}|map unit|map unit, generic|5320|^d|TRd|Dinwoody Formation|Dinwoody Formation|Early Triassic|unprovided|Early Triassic|Early Triassic|Interbedded shale, limestone, and calcareous sandstone characterized by platy, thinly laminated beds that weather a distinctive pale to light grayish brown. Upper part has massive calcareous, rippled sandstone beds as much as 1 m (3 ft) thick with shaley interbeds and massive, gray, pinkish gray weathering, limestone as much as 1 m (3 ft) thick. Phosphatic pelecypod Lingula and fish bone fossils are locally abundant. Lower part is predominantly olive drab, chippy-weathering, hard fissile shale with interbedded dark brown weathering, silty limestone beds 10 cm (4 in) or thinner. Thickness about 260–275 m (650 ft) (Myers, 1952).|17|dmu, map unit|128,179,204||{B4F03DC4-7787-49F9-80C4-16E8A1B5E728}|Sedimentary rock|high||997|DAS01|||||{C2109E76-A904-4ED5-9CBF-701744ECB405}
3|{79581325-E35D-4FD2-A67F-8B1513876933}|map unit|map unit, generic|2130|Kbf|Kbf|Blackleaf Formation, Flood Member|Flood Member of Blackleaf Formation of Colorado Group|Early Cretaceous|unprovided|Early Cretaceous|Early Cretaceous|Pale brown to brownish gray, green, red, and gray, fine- to medium-grained and locally coarse-grained to conglomeratic, quartz- and chert-rich lithic sandstone, shale, calcareous siltstone, siltstone, and conglomerate. Trough crossbedding common in sandstone. (Tysdal and others, 1994; Dyman and Nichols, 1988). Thickness about 213 m (700 ft).|15|dmu, map unit|204,222,179||{83CA80A1-3518-472D-854F-DAAB121EE141}|Clastic sedimentary rock|high||997|DAS01 | DAS05 | DAS11|||SPARKER1|2022-07-08 20:51:15|{79581325-E35D-4FD2-A67F-8B1513876933}
4|{E61CEF96-2042-484B-B514-D943398E3D38}|map unit|map unit, generic|5470|Kbl|Kbl|Blackleaf Formation, undivided|Blackleaf Formation, undivided, of Colorado Group|Early to Late Cretaceous|unprovided|Early Cretaceous|Late Cretaceous|Dark gray, yellow, maroon, gray green, and yellowish gray siltstone, mudstone, and porcellanite. Interbedded with gray to yellow fine- to medium-grained sandstone with common quartz and chert grains. Distinguished from the overlying Frontier Formation based on dominance of siltstones and mudstones over sandstones, presence of porcellanite, and absence of large 3D ripples in sandstone units. The contact between the Blackleaf and Frontier Formations is placed at the top of a porcellanite bed that directly overlies the stratigraphically highest maroon mudstone (Tysdal and others, 1994; Dyman and Tysdal, 1998). Near the McCartney Mountain pluton, and smaller granodiorite intrusions, the Blackleaf Formation has undergone contact metamorphism, which makes it difficult to distinguish between the Vaughn and Flood Members. Total thickness approximately 700 m (2,300 ft). Where possible, the Blackleaf Formation is divided into two members:|13|dmu, map unit|128,153,077||{83CA80A1-3518-472D-854F-DAAB121EE141}|Clastic sedimentary rock|high||997|DAS01 | DAS05 | DAS11|||SPARKER1|2022-07-08 20:47:23|{E61CEF96-2042-484B-B514-D943398E3D38}
5|{F1709F7E-0300-4386-9100-DB36B0F29AC0}|map unit|map unit, generic|7560|Kbv|Kbv|Blackleaf Formation, Vaughn Member|Vaughn Member of the Blackleaf Formation of Colorado Group|Early to Late Cretaceous|unprovided|Early Cretaceous|Late Cretaceous|Olive green, yellowish green, bright green, and gray green, hard, dense, and calcareous siltstone and porcellanitic (silicified) mudstone. Subordinate gray, greenish gray, and olive gray, fine- to medium-grained, and locally coarse-grained lithic sandstone, with high percentage of volcaniclastic debris, and matrix-supported conglomerate and conglomeratic sandstone with clasts mostly of chert and quartzite. An association of distinctive lithologies is present in the uppermost part, which consists of maroon mudstone and siltstone, gray freshwater limestone or locally very calcareous mudstone and siltstone, dark gray shale, and bright green porcellanite. Upper contact is mapped at top of a porcellanite bed, interbedded with micritic limestone that directly overlies the stratigraphically highest maroon mudstone (Tysdal and others, 1994; Dyman and Tysdal, 1998). A porcellanite bed approximately 25 m (80 ft) below the top of the Vaughn in the Frying Pan Basin (to the southwest along border of Argenta quadrangle) yielded a U-Pb age of 94.8 ± 0.5 Ma (Zartman and others, 1995). Thickness approximately 488 m (1,600 ft) (Tysdal and others, 1994).|14|dmu, map unit|077,128,102||{83CA80A1-3518-472D-854F-DAAB121EE141}|Clastic sedimentary rock|high||997|DAS01 | DAS05 | DAS11 | DAS12|||SPARKER1|2022-07-08 20:50:27|{F1709F7E-0300-4386-9100-DB36B0F29AC0}
6|{A455379B-7C82-4388-B23A-1DBD5040FBE4}|map unit|map unit, generic|4240|Kf|Kf|Frontier Formation|Frontier Formation of Colorado Group|Late Cretaceous|unprovided|Late Cretaceous|Late Cretaceous|Dominantly gray, brownish gray, and greenish gray siltstone and mudstone, and subordinate medium- to coarse-grained, and locally very coarse-grained sandstone, conglomerate, and minor porcellanite. The beds of mudstone, siltstone, limestone, and sandstone form fining-upward depositional cycles tens of meters thick. Sandstone and conglomerate are rich in quartz and chert. Sandstones typically have distinctive low amplitude (~10–20 cm) and high wavelength (1–2 m) 3D ripples, which are not present in the underlying Blackleaf Formation. Conglomerate clasts are rounded pebbles and small cobbles. Lower 100–200 m (330–660 ft) is distinctive brown to brownish gray siltstone and mudstone. Top not exposed but thickness about 900 m (3,000 ft) north of the quadrangle (Tysdal and others, 1994; Dyman and Nichols, 1988).|12|dmu, map unit|153,204,153||{83CA80A1-3518-472D-854F-DAAB121EE141}|Clastic sedimentary rock|high||997|DAS01 | DAS05 | DAS11|||SPARKER1|2022-07-08 20:47:17|{A455379B-7C82-4388-B23A-1DBD5040FBE4}
7|{00F7E100-FDD5-41CE-AE9A-D48F4F5ED2B0}|map unit|map unit, generic|A670|Kgd|Kgd|granodiorite to porphyritic dacite|granodiorite to porphyritic dacite|Late Cretaceous|unprovided|Late Cretaceous|Late Cretaceous|Gray, porphyritic, coarse-grained biotite granodiorite with common feldspar and hornblende. Smaller granodiorite to porphyritic dacite intrusions south of the Big Hole River have feldspar and hornblende phenocrysts in a medium-grained to aphanitic matrix. Jointing is common with a 0.5–2 m spacing, with coarser-grained portions of the intrusion having greater joint spacing. The McCartney Mountain pluton has yielded a biotite K/Ar cooling age of 74 ± 1 Ma (Brumbaugh and Hendrix, 1981) and a U/Pb crystallization age of 74.5 ± 1.1 Ma based on a weighted mean of five concordant zircons (Foster and others, 2012).|11|dmu, map unit|235,102,077||{CF5DFA93-4BF2-4B8D-9C5F-FE5ADE0A11B0}|Coarse-grained, intermediate-composition intrusive igneous rock|high||997|DAS01 | DAS09 | DAS10|||SPARKER1|2022-07-08 20:45:43|{00F7E100-FDD5-41CE-AE9A-D48F4F5ED2B0}
8|{8D34E6DA-7942-42B8-AB8A-029AB2015A8B}|map unit|map unit, generic|6460|Kk|Kk|Kootenai Formation|Kootenai Formation|Early Cretaceous|unprovided|Early Cretaceous|Early Cretaceous|Mapped as one unit, but consists of four distinct units (after Myers, 1952). Combined thickness of all units about 290 m (950 ft). Gastropod limestone member: Light gray, thick-bedded, gastropod coquina or gastropod-rich limestone that may also contain charophytes and ostrocodes. Forms conspicuous ridges. Red mudstone member: Variegated shale and mudstone, dominated by red, orange, and purple, and subordinate light and medium gray colors, interbedded with minor reddish quartz- and chert-rich lithic sandstone. Poorly exposed recessive unit. Fine-grained limestone member: Pale yellowish gray to pale brown, dense limestone and shaly limestone with interbedded shale. Basal sandstone and mudstone: Upper part recessive, mostly reddish and greenish mudstone; lower part is ridge-forming, coarse- to medium-grained, cross-bedded to massive, brown to yellowish gray chert-rich lithic sandstone with “salt and pepper appearance” and local lenses of black chert conglomerate and limestone pebble conglomerate; interbedded with reddish and greenish mudstone.|16|dmu, map unit|102,153,102||{B4F03DC4-7787-49F9-80C4-16E8A1B5E728}|Sedimentary rock|high||997|DAS01 | DAS13|||SPARKER1|2022-07-08 20:52:27|{8D34E6DA-7942-42B8-AB8A-029AB2015A8B}
9|{1D139302-36C5-4401-99CD-EBCB64D00984}|map unit|map unit, generic|4210|Psp|Psp|Shedhorn and Phosphoria Formations, undivided|Shedhorn and Phosphoria Formations, undivided|Permian|unprovided|Permian|Permian|Shedhorn Formation is grayish brown, fine-grained, thin- to thick-bedded quartz sandstone and cherty sandstone with chert and quartz cement. Vertical and horizontal burrows are common. Phosphoria Formation is dark gray to black, carbonaceous and phosphatic mudstone with scarce phosphate beds, grayish and gray brown cherty quartz sandstone, cherty or sandy dolomite, fine-grained dolomitic sandstone, and yellowish tan sandy siltstone with subordinate beds of vitreous quartz sandstone. Poorly exposed, typically covered by colluvium and talus of underlying Quadrant Formation. Thickness approximately 110 m (360 ft) in Twin Adams quadrangle to the immediate west (Sharp, 1970).|18|dmu, map unit|153,204,222||{B4F03DC4-7787-49F9-80C4-16E8A1B5E728}|Sedimentary rock|high||997|DAS01 | DAS14|||SPARKER1|2022-07-11 20:34:19|{1D139302-36C5-4401-99CD-EBCB64D00984}
10|{8BEAE63C-6151-482B-A6C1-BE7381FC1F90}|map unit|map unit, generic|AA40|Qac|Qac|alluvium and colluvium|alluvium and colluvium|Holocene and Pleistocene?|unprovided|Pleistocene|Holocene|Unconsolidated poorly-sorted deposits of sand, silt, and clay, and gravel, deposited by modern streams and rivers and on adjacent slopes by sheetwash and gravity processes. Variable thickness, generally less than 10 m (33 ft).|03|dmu, map unit|235,235,153||{EFF14953-918D-4560-87E8-CB91351003C9}|Alluvial sediment, mostly coarse-grained|low||997|DAS01|||||{8BEAE63C-6151-482B-A6C1-BE7381FC1F90}
11|{7CFF6A48-9869-4F06-AF02-451067120570}|map unit|map unit, generic|12X0|Qaf|Qaf|alluvial fan deposits|alluvial fan deposits|Holocene|unprovided|Holocene|Holocene|Clay to cobble-sized, angular clasts forming broad conical deposits at outlets of mountain streams. Qaf deposits across the map area likely do not correlate with one another. Up to 10 m (33 ft) thick.|05|dmu, map unit|222,204,000||{447F4813-BFBB-4620-90CC-3444D41E34DA}|Alluvial sediment|high||997|DAS01|||||{7CFF6A48-9869-4F06-AF02-451067120570}
12|{D6832229-95EC-4D33-A289-7014393A4275}|map unit|map unit, generic|0010|Qal|Qal|alluvium|alluvium|Holocene|unprovided|Holocene|Holocene|Unconsolidated, poorly sorted to well-sorted deposits of gravel, sand, silt, and clay deposited by modern streams and rivers. Cobbles and boulders are generally angular in tributary streams in the western portion of the quadrangle, and well rounded in the Big Hole River in the northeastern portion of the quadrangle. Clasts are predominantly comprised of locally sourced bedrock, including shale, sandstone, limestone, quartzite, and granodiorite. Thickness as much as 12 m (40 ft) based on logs for household groundwater wells.|01|dmu, map unit|255,255,222||{447F4813-BFBB-4620-90CC-3444D41E34DA}|Alluvial sediment|high||997|DAS01|||||{D6832229-95EC-4D33-A289-7014393A4275}
13|{F6E8BB44-ECC9-410B-89C2-E830F3E10181}|map unit|map unit, generic|AA30|Qalo|Qalo|alluvium, older than Qal|alluvium, older than Qal|Holocene and Pleistocene?|unprovided|Pleistocene|Holocene|Unconsolidated, poorly sorted to well-sorted deposits of gravel, sand, silt, and clay deposited by streams in Holocene time. Likely represent ancient channels and floodplains of modern streams. Cobbles and boulders generally angular to rounded and consist of locally sourced bedrock, including shale, sandstone, limestone, quartzite, and granodiorite. Thickness as much as 12 m (40 ft).|02|dmu, map unit|235,235,179||{447F4813-BFBB-4620-90CC-3444D41E34DA}|Alluvial sediment|high||997|DAS01|||SPARKER1|2022-07-08 20:39:06|{F6E8BB44-ECC9-410B-89C2-E830F3E10181}
14|{D4133026-CA36-45C6-95C3-9C95CD43B047}|map unit|map unit, generic|A260|Qc|Qc|colluvium|colluvium|Holocene and Pleistocene?|unprovided|Pleistocene|Holocene|Unconsolidated, locally derived slope deposits that contain angular, poorly sorted clasts, pebble size and larger. Thickness generally less than 10 m (33 ft).|04|dmu, map unit|235,204,102||{F0646F40-5324-404D-B3CA-EA0C8C1E65BB}|Colluvium and other widespread mass-movement sediment|high||997|DAS01|||||{D4133026-CA36-45C6-95C3-9C95CD43B047}
15|{C2806419-E38D-4EFA-A2D2-30BB0EDB8A23}|map unit|map unit, generic|0A30|Tmm|Tmm|McCartney Mountain gravels|McCartney Mountain gravels|Pliocene?|unprovided|Pliocene|Pliocene|Youngest Tertiary sediments exposed on the southern and western flanks of McCartney Mountain. Unconsolidated to loosely consolidated. Gravels are generally tan matrix- and clast-supported granules to boulders with a silt to sand matrix. Clasts are angular sandstone, shale, quartzite, and granodiorite, rarely including subrounded clasts from the underlying Sixmile Creek and Renova Formations. Clast composition changes along the mountain front to reflect local sourcing. Locally contains 5 to 20-cm-thick beds of clast-supported gravels with imbricated angular clasts, interpreted to be braided stream deposits. The cone-shaped morphology of these deposits suggests they formed as alluvial fans, which have been subsequently abandoned and incised. Thickness is at least 10 m (33 ft), and may be significantly greater in the hanging wall of the Timber Canyon Fault.|06|dmu, map unit|255,235,179||{EFF14953-918D-4560-87E8-CB91351003C9}|Alluvial sediment, mostly coarse-grained|high||997|DAS01|||SPARKER1|2022-07-11 19:58:52|{C2806419-E38D-4EFA-A2D2-30BB0EDB8A23}
16|{522A79A8-0513-4FEA-A4F2-1AA870FBE477}|map unit|map unit, generic|0240|Trbb|Trbb|Renova Formation, Bone Basin Member|Bone Basin member of Renova Formation of Bozeman Group|Late Eocene|unprovided|Late Eocene|Late Eocene|Tan gray to white siltstone and tuffaceous siltstone. Massive with no discernible bedding, and rare matrix-supported granules of quartz and lithic grains. Locally contains 1 to 5-m-wide channels of fine- to very coarse-grained micaceous sandstone dominated by quartz and feldspar, with minor lithic grains. Fossil assemblages collected in the Glen quadrangle and the adjacent Block Mountain quadrangle indicate a Late Eocene (Chadronian) depositional age (Riel, 1963; Hoffman, 1971; McHugh, 2003). At least 200 m (656 ft) thick (McHugh, 2003), but may be significantly thicker, as gravity modeling by Chandler (1973) suggests that Tertiary sediments south of the Timber Canyon Fault may be up to 1,005 m (3,300 ft) thick.|10|dmu, map unit|255,204,153||{CDCCF787-1D4D-4CE1-A829-F0019B58A0C9}|Silt and clay of unspecified origin|high||997|DAS01 | DAS03 | DAS04 | DAS07 | DAS08|||SPARKER1|2022-07-08 20:44:30|{522A79A8-0513-4FEA-A4F2-1AA870FBE477}
17|{BFABCB4D-43B3-40C7-A0D3-9BA1DCF7BBEB}|map unit|map unit, generic|A360|Trcp|Trcp|Renova Formation, Cabbage Patch Member|Cabbage Patch member of Renova Formation of Bozeman Group|Oligocene-Early Miocene|unprovided|Oligocene|Early Miocene|Gray, gray tan, and white, well-sorted, clast-supported pebble to cobble conglomerate with fine to coarse sand matrix. Clasts are subrounded to rounded. Contains white, tan, pink, and purple quartzite, sandstone, and granite. Interbedded with poorly sorted, matrix-supported conglomerate, with a medium to coarse litharenite matrix and rare angular to subangular pebbles to large boulders of granite, and quartzite. Distinguished from Tsc based on lithification (i.e., Tsc is unlithified, Trcp is lithified), presence of both matrix and clast-supported beds, and abundant pink and purple quartzites likely sourced from Mesoproterozoic Belt Supergroup strata. May correlate with the Cabbage Patch Member of the Renova Formation. Thickness is at least 10 m (33 ft) based on exposures southwest of McCartney Mountain and logs for nearby domestic groundwater wells, but may be significantly thicker in the hanging wall of the Timber Canyon Fault. Unconformably overlies Trbb in the adjacent Block Mountain quadrangle. Locally missing due to erosion or non-deposition.|09|dmu, map unit|235,179,102||{728F76CD-FCFA-4F82-AC67-08457BC28C68}|Sand and gravel of unspecified origin|high||997|DAS01|||||{BFABCB4D-43B3-40C7-A0D3-9BA1DCF7BBEB}
18|{8E3E32B0-A0C1-42A4-BB2C-F0FF0A2CA5F5}|map unit|map unit, generic|A4X0|Tscb|Tscb|Sixmile Creek Formation, Big Hole Member|Big Hole member of Sixmile Creek Formation of Bozeman Group|Miocene|unprovided|Miocene|Miocene|Tan to tan gray, well-sorted, clast-supported, coarse sand to boulder gravel with silty to sandy matrix. Clasts are subrounded to well rounded. Contains tan weathering white, tan, and pink cobbles of Mesoproterozoic Belt Supergroup quartzite and the Cambrian Flathead Formation. Contains subordinate clasts of granite, as well as sandstone and shale sourced from local Mesozoic to Paleozoic strata. Distinguished from other Tertiary sediments based on 1 to10-m-thick beds of tan weathering rounded cobbles comprised of tan and white quartzite. Likely correlates with the Big Hole River Member of the Sixmile Creek Formation as described by Sears and others (2009). Exposures are up to 110 m (360 ft) high. Ranges to more than 120 m (395 ft) thick. Locally missing due to erosion or non-deposition.|07|dmu, map unit|235,153,000||{728F76CD-FCFA-4F82-AC67-08457BC28C68}|Sand and gravel of unspecified origin|high||997|DAS01 | DAS06|||SPARKER1|2022-07-08 20:40:23|{8E3E32B0-A0C1-42A4-BB2C-F0FF0A2CA5F5}
19|{D741C43B-2189-474C-9028-6BEC134279F8}|map unit|map unit, generic|0250|Tscs|Tscs|Sixmile Creek Formation, Sweetwater Creek Member|Sweetwater Creek member of Sixmile Creek Formation of Bozeman Group|Miocene|unprovided|Miocene|Miocene|Tan to light gray, unlithified to weakly consolidated silt, sand, and gravel with an ashy matrix. Clasts are angular to subangular and are primarily derived from local bedrock. Contains 5 to 60-cm-thick beds of very coarse matrix-supported sand and pebble conglomerate with silty to sandy matrix. Interpreted to be debris flow deposits. Includes 0.1 to 3-m-thick channel deposits of clast-supported, pebble to cobble conglomerate, with subrounded to rounded clasts of predominantly local affinity. Commonly includes 10 to 30-cm-thick massive light gray ashy silt to fine sand beds. Locally contains paleosols with pedogenic carbonate horizon up to 1 m thick. Exposures are up to 50 m (164 ft) high. At least 60 m (200 ft) thick based on domestic groundwater well logs in the Glen quadrangle. May correlate with the Sweetwater Creek Member of the Sixmile Creek Formation as described by Sears and others (2009). Locally missing due to erosion or non-deposition.|08|dmu, map unit|255,204,128||{F43C70C1-AB3B-4D0F-8019-FDFD3D5E9C04}|Clastic sediment|high||997|DAS01 | DAS06|||SPARKER1|2022-07-08 20:40:56|{D741C43B-2189-474C-9028-6BEC134279F8}
