OID_,MapUnit,Name,FullName,Age,Descr,HKey,ParaSty,Label,Symbol,RGB,PatDes,DesSrcID,GeoMat,GeoMatConf,DMapUns_ID
1,,Map Units,,,,000,Heading1,,,,,Stitzer_Montfort_Geology_Stewart_2023,,,DMU1
2,,Cenozoic,,,,001,Heading2,,,,,Stitzer_Montfort_Geology_Stewart_2023,,,DMU2
3,,Quaternary,,,Quaternary units were mapped where estimated thicknesses exceed 3 m (10 feet). Most Quaternary unit descriptions follow Stewart and others (2022a). Windblown deposit units were updated based on E. Carson (pers. comm.),001-001,Heading3,,,,,Stitzer_Montfort_Geology_Stewart_2023,,,DMU3
4,,Alluvium,,,,001-001-001,Heading4,,,,,Stitzer_Montfort_Geology_Stewart_2023,,,DMU4
5,Qa,Alluvium,"Quaternary, alluvium",Quaternary,"Well-sorted Holocene and Pleistocene sand, silt, and mud. Deposited as overbank deposits in modern valleys. Cobble beds are uncommon, but can be found in river valleys where adjacent hillslopes are draped by colluvial deposits.",001-001-001-001,DMU1,Qa,Qa,"224,214,202",,Stitzer_Montfort_Geology_Stewart_2023,Clastic sediment,High,DMU5
6,,Colluvium,,,,001-001-002,Heading4,,,,,Stitzer_Montfort_Geology_Stewart_2023,,,DMU6
7,Qc,Colluvium,"Quaternary, colluvium",Quaternary,"Angular, poorly sorted boulders, cobbles, sand, and silt. Deposited at the base and lower reaches of valley slopes from gravity-driven mass wasting, soil creep, and non-channelized overland flow. The unit tends to fine towards the valley bottoms, and can interfinger with alluvium. Thicknesses are generally in excess of 3 m (10 ft), but rapid changes are likely due to an uneven bedrock surface.",001-001-002-001,DMU1,Qc,Qc,"236,220,172",,Stitzer_Montfort_Geology_Stewart_2023,Colluvium and other widespread mass-movement sediment,High,DMU7
8,,Windblown deposits,,,,001-001-003,Heading4,,,,,Stitzer_Montfort_Geology_Stewart_2023,,,DMU8
9,Qlc,Undivided loess over carbonate rocks,"Quaternary, undivided loess over carbonate rocks",Quaternary,"Windblown deposits of very fine sand, silt, and clay. May include parts of the Roxana and Peoria Members of the Kieler Formation, a loess formation. Loess is present on upland surfaces, and is generally thicker on broad plateaus than narrow ridges. Undivided loess over carbonate rocks. The Rountree Formation, formed from the surface weathering of carbonate rocks, is probably discontinuously present beneath the loess.",001-001-003-001,DMU1,Qlc,Qlc,"224,216,183",,Stitzer_Montfort_Geology_Stewart_2023,Loess,High,DMU9
10,Qlb,Undivided loess over siliciclastic bedrock,"Quaternary, undivided loess over siliciclastic bedrock",Quaternary,"Windblown deposits of very fine sand, silt, and clay. May include parts of the Roxana and Peoria Members of the Kieler Formation, a loess formation. Loess is present on upland surfaces, and is generally thicker on broad plateaus than narrow ridges. Undivided loess over siliciclastic bedrock.",001-001-003-002,DMU1,Qlb,Qlb,"239,244,216",,Stitzer_Montfort_Geology_Stewart_2023,Loess,High,DMU10
11,Qlcb,Undivided loess over mixed carbonate and siliciclastic bedrock,"Quaternary, undivided loess over mixed carbonate and siliciclastic bedrock",Quaternary,"Windblown deposits of very fine sand, silt, and clay. May include parts of the Roxana and Peoria Members of the Kieler Formation, a loess formation. Loess is present on upland surfaces, and is generally thicker on broad plateaus than narrow ridges. Undivided loess over mixed carbonate and siliciclastic bedrock.",001-001-003-003,DMU1,Qlcb,Qlcb,"239,231,203",,Stitzer_Montfort_Geology_Stewart_2023,Loess,High,DMU11
12,,Paleozoic,,,"Paleozoic bedrock units were mapped where bedrock is estimated to be within 3 m (10 ft) of land surface. Within Paleozoic units, outcrops are generally discontinuous at the surface. Stratigraphic units use the classfication scheme of Agnew and others (1956), which has diferent divisions for the Sinnipee Group than Wisconsin Geological and Natural History Survey (2011). Unit descriptions generally follow Stewart and others (2022a). Carbonate units follow the classification of Dunham (1962).",002,Heading2,,,,,Stitzer_Montfort_Geology_Stewart_2023,,,DMU12
13,,Ordovician,,,,002-001,Heading3,,,,,Stitzer_Montfort_Geology_Stewart_2023,,,DMU13
14,,Galena Formation,,,,002-001-001,Heading4,,,,,Stitzer_Montfort_Geology_Stewart_2023,,,DMU14
15,Og,Galena Formation,Galena Formation of the Sinnipee Group,Ordovician,"Tan to gray, vuggy dolomite. Thin- to medium-bedded. The upper Galena Formation is composed of granular, sandy dolomite, but is not exposed in the map area. The lower approximately 36.5 m (120 ft) of the Galena Formation contains sandy dolomite with interbedded gray chert. Receptaculites is common in the lower Galena. At the surface, the dolomite often weathers into a distinctive honeycomb appearance. Honeycomb weathering is thought to result from preferred dissolution and weathering of Thalassinoides burrows (Dockal, 2021; Stewart and others, 2022b). Though the entire section is not exposed in the map area, the full thickness of the Galena Formation elsewhere ranges from approximately 70–76 m (230–250 ft).",002-001-001-001,DMU1,Og,Og,"199,133,154",,Stitzer_Montfort_Geology_Stewart_2023,Dolomite,Medium,DMU15
16,,Decorah Formation,,,,002-001-002,Heading4,,,,,Stitzer_Montfort_Geology_Stewart_2023,,,DMU16
17,Od,Decorah Formation,Decorah Formation of the Sinnipee Group,Ordovician,"The Decorah Formation contains the upper Ion Member, the middle Guttenburg Member, and the basal Spechts Ferry Member. The Ion Member contains thin- to medium-bedded gray dolomitic mudstone and wackestone. Shale partings are common, and they define bedsets in the field. The Guttenburg Member is composed of 0.5–10 cm (0.2–2.4 in) thick gray to tan mottled mudstone to wackestone with interbedded chocolate brown to gray shaley mudstone around 1 cm (0.4 in) thick. The Spechts Ferry Member contains green-blue laminated, fissile shale with subordinate interbedded gray limestone and dolostone. The Spechts Ferry Member is around 0.6–0.9 m (2–3 ft) thick in the Stitzer and Montfort area, but thickens westward to around 2.6 m (8.5 ft) at the type section in Dubuque County, Iowa (Kay, 1929). The Decorah Formation contains abundant brachiopod fossils throughout. The Decorah Formation is around 9–12 m thick (30–40 ft).",002-001-002-001,DMU1,Od,Od,"214,157,193",,Stitzer_Montfort_Geology_Stewart_2023,Mostly carbonate rock,Medium,DMU17
18,,Platteville Formation,,,,002-001-003,Heading4,,,,,Stitzer_Montfort_Geology_Stewart_2023,,,DMU18
19,Op,Platteville Formation,Platteville Formation of the Sinnipee Group,Ordovician,"The Platteville Formation contains the upper Quimbys Mill Member, the middle McGregor Member, and the basal Pecatonica Member. The Quimbys Mill Member contains thin-bedded, fine-grained gray to brown mudstone. The mudstone fractures conchoidally, which helps distinguish the unit. Millimeter to centimeter thick brown shale partings and interbeds define bedsets. The McGregor Member contains thin-bedded gray wackestone interbedded with dark gray, shaley mudstone. Bedding is wavy and mottled. Brachiopods are common. The Pecatonica Member is a tan to gray, thin- to medium-bedded dolomitic mudstone to wackestone. Bedding is typically tabular. The total thickness of the Platteville Formation is approximately 15 m (50 ft).",002-001-003-001,DMU1,Op,Op,"208,176,184",,Stitzer_Montfort_Geology_Stewart_2023,Carbonate rock,Medium,DMU19
20,,Ancell Group,,,,002-001-004,Heading4,,,,,Stitzer_Montfort_Geology_Stewart_2023,,,DMU20
21,Oa,Ancell Group,Ancell Group,Ordovician,"The Ancell Group includes the Glenwood Formation and the St. Peter Formation. The Glenwood Formation is a light to dark green, fissile shale 0.6-1 m thick. The underlying St. Peter Formation contains the upper Tonti Member and the basal Readstown Member. The Tonti member is a clean, tan to white, fine- to medium-grained quartz arenite. Bedding ranges from thin to medium. Large cross-beds are common. Near the contact with the Glenwood, the Tonti is cemented with iron sulfides and carbonate. The Readstown Member is poorly exposed in the Stitzer and Montfort areas, but elsewhere it contains interbedded white to tan, fine-grained quartz arenite and mottled, maroon to green shale. Soft-sediment deformation is common. The base of the Readstown forms an unconformity with the underlying Prairie du Chien Group. The thickness of the St. Peter Formation is variable, but the combined Ancell-Prairie du Chien thickness in southwest Wisconsin is around 82–98 m (270–320 ft) (Agnew and others, 1956).",002-001-004-001,DMU1,Oa,Oa,"188,149,158",,Stitzer_Montfort_Geology_Stewart_2023,Mostly sandstone,Medium,DMU21
22,,Prairie du Chien Group,,,,002-001-005,Heading4,,,,,Stitzer_Montfort_Geology_Stewart_2023,,,DMU22
23,Opc,Prairie du Chien Group,Prairie du Chien Group,Ordovician,"The Prairie du Chien Group in the Stitzer and Montfort area is largely composed of the Oneota Formation. The Oneota Formation is generally a tan to gray, thin- to thick-bedded, fine-grained dolostone. Vugs and chert are common. Fine-grained micrite and stromatolites occur locally. The base of the Prairie du Chien Group is not exposed in the map area.",002-001-005-001,DMU1,Opc,Opc,"246,211,216",,Stitzer_Montfort_Geology_Stewart_2023,Mostly carbonate rock,Medium,DMU23
