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Geology of the Baraboo Hills, Sauk and Columbia Counties, Wisconsin
Located in the south-central portion of the state, new geologic mapping of the frequently-visited Baraboo Hills has resulted in a revision of the stratigraphy of the Precambrian-aged bedrock. The Baraboo Quartzite is now divided into four informal members, and the maximum depositional age for the Baraboo Quartzite is 1714±17 million years old. These...-
Geology of the Baraboo Hills, Sauk and Columbia Counties, Wisconsin [plate 1]
2025
Map: 48.25 in x 29.25 in, scale 1:50,000
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GIS Data for Geology of the Baraboo Hills, Sauk and Columbia Counties, Wisconsin [dataset 1]
2025
GIS Data: GeMS Level 3 file geodatabase (.gdb file format) and GeoPackage (.gpkg file fomat)
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Depth to Bedrock in Grant County, Wisconsin
Depth-to-bedrock mapping of Grant County provides baseline information on unconsolidated surficial sediment thickness across the county. Bedrock aquifers in Grant County are susceptible to contamination from various land use activities, and depth to bedrock represents one of several factors affecting aquifer susceptibility. The results of this study...-
Depth to Bedrock in Grant County, Wisconsin [dataset 1]
2025
GIS Data: File geodatabase (.gdb file format)
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Depth to Bedrock in Lafayette County, Wisconsin
The depth-to-bedrock raster of Lafayette County is a continuous model of surficial sediment thickness with a cell size resolution of 32.8 ft (10 m). Results show that the depth to bedrock in Lafayette County varies depending on physiographic setting. The largest values occur in the Pecatonica River valley, where more than 100 ft (30.5 m) of unconsolidated...-
Depth to Bedrock in Lafayette County, Wisconsin [dataset 1]
2025
GIS Data: File geodatabase (.gdb file format)
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Geologic Map of the Ferryville and Lansing 7.5-Minute Quadrangles, Crawford County, Wisconsin
The geologic map of the Ferryville and Lansing 7.5-minute quadrangles (Crawford County), located in the Driftless Area of southwestern Wisconsin, provides new observations and lithologic descriptions of the area's geology. This work supports the Wisconsin Department of Transportation's ongoing efforts to mitigate slope failures along the Wisconsin State...-
Geologic Map of the Ferryville and Lansing 7.5-Minute Quadrangles, Crawford County, Wisconsin
2025
Map: 41.5 in x 30.75 in, scale 1:24,000
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GIS Data for the Geologic Map of the Ferryville and Lansing 7.5-Minute Quadrangles, Crawford County, Wisconsin [dataset 1]
2025
GIS Data: GeMS Level 3 file geodatabase (.gdb file format) and GeoPackage (.gpkg file format)
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Geologic Map of the Eastman and Harpers Ferry 7.5-Minute Quadrangles, Crawford County, Wisconsin
The geologic map of the Eastman and Harpers Ferry 7.5-minute quadrangles (Crawford County), located in the Driftless Area of southwestern Wisconsin, provides new observations and lithologic descriptions of the area's geology. This work supports the Wisconsin Department of Transportation's ongoing efforts to mitigate slope failures along the Wisconsin...-
Geologic Map of the Eastman and Harpers Ferry 7.5-Minute Quadrangles, Crawford County, Wisconsin
2025
Map: 36 in x 32.5 in, scale 1:24,000
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GIS Data for the Geologic Map of the Eastman and Harpers Ferry 7.5-Minute Quadrangles, Crawford County, Wisconsin [dataset 1]
2025
GIS Data: GeMS Level 3 file geodatabase (.gdb file format) and GeoPackage (.gpkg file format)
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Bedrock Geology of Grant County, Wisconsin
Three-dimensional bedrock mapping of Grant County at a scale of 1:100,000 provides new baseline information on the distribution of geologic units. Grant County contains Paleozoic bedrock units ranging in age from Silurian to Cambrian. Gentle folds and small faults deform the Paleozoic sequence and were mapped based on structure contours of the base of the...-
GIS Data for Bedrock Geology of Grant County, Wisconsin [dataset 1]
2025
GIS Data: GeMS Level 3 file geodatabase (.gdb), GeoPackage, metadata
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Geochemical Data for Bedrock Geology of Grant County, Wisconsin [dataset 2]
2025
Data: Spreadsheet (.csv)
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GIS Data for Bedrock Geology of Grant County, Wisconsin [dataset 3]
2025
GIS Data: File geodatabase (.gdb) raster datasets, metadata
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Geologic Map of Mill Bluff State Park, Monroe and Juneau Counties, Wisconsin
The geologic map of the Mill Bluff State Park provides a detailed look at the bedrock geology present at one of Wisconsin's most cherished natural sites. The map and accompanying report present the Paleozoic bedrock stratigraphy of the visible formations, as well as an interpretation of their depositional environment. This map was created as part of an...-
Geologic Map of Mill Bluff State Park, Monroe and Juneau Counties, Wisconsin
2024
Map: 24 x 36 in, scale 1:12,000
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Geologic Map of the Highland West and Highland East 7.5-Minute Quadrangles, Grant and Iowa Counties, Wisconsin
The geologic map of the Highland West and Highland East 7.5-minute quadrangles includes 1:24,000-scale mapping of both surficial and bedrock geology. Highland was a long-lived and important sub-district of the Upper Mississippi lead-zinc mining area in the 19th and 20th centuries. Recent and renewed interest in the presence and distrubution of critical...-
Geologic Map of the Highland West and Highland East 7.5-Minute Quadrangles, Grant and Iowa Counties, Wisconsin
2024
Map: 46 in x 36 in, scale 1:24,000
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GIS Data for the Geologic Map of the Highland West and Highland East 7.5-Minute Quadrangles, Grant and Iowa Counties, Wisconsin [dataset 1]
2024
GIS Data: GeMS file geodatabase, shapefiles, metadata
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Geologic Map of the Durwards Glen 7.5-Minute Quadrangle, Columbia and Sauk Counties, Wisconsin
The Durwards Glen 7.5-minute quadrangle map is located in Columbia and Sauk counties, southeast of the city of Baraboo. This geologic map includes Precambrian through Quaternary units. New mapping has focused on subdividing the Baraboo Quartzite into four separate members and delineating Quaternary deposits in greater detail than prior work.-
Geologic Map of the Durwards Glen 7.5-Minute Quadrangle, Columbia and Sauk Counties, Wisconsin
2024
Map: 35 x 40 in, scale 1:24,000
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GIS Data for the Geologic Map of the Durwards Glen 7.5-Minute Quadrangle, Columbia and Sauk Counties, Wisconsin [dataset 1]
2024
GIS Data: GeMS file geodatabase, shapefiles, geopackage, metadata
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Geologic Map of the Dells of the Wisconsin River State Natural Area
The geologic map of the Dells of the Wisconsin River State Natural Area provides a detailed look at the bedrock geology present at one of Wisconsin's most cherished natural sites. The map and accompanying report present the Paleozoic bedrock stratigraphy of the visible formations, as well as an interpretation of their depositional environment. This map...-
Geologic Map of the Dells of the Wisconsin River State Natural Area
2023
Map: 30 x 36 in, scale 1:12,000
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Geologic Map of the Fennimore and Mount Hope 7.5-Minute Quadrangles, Grant County, Wisconsin
The geologic map of the Fennimore and Mount Hope quadrangles includes 1:24,000-scale mapping of both surficial and bedrock geology. The mapping was initiated to support groundwater studies in the area. The map and accompanying report present the Paleozoic bedrock stratigraphy, including structures, as well as data from three new bedrock drill cores...-
Geologic Map of the Fennimore and Mount Hope 7.5-Minute Quadrangles, Grant County, Wisconsin
2023
Map: 50.55 x 36 in, scale 1:24,000
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GIS Data for the Geologic Map of the Fennimore and Mount Hope 7.5-Minute Quadrangles, Grant County, Wisconsin [dataset 2]
2023
GIS Data: GeMS file geodatabase, metadata
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Geologic map of the Stitzer and western part of the Montfort 7.5-minute quadrangles, Grant County, Wisconsin
The geologic map of the Stitzer and western part of the Montfort quadrangles includes 1:24,000-scale mapping of both surficial and bedrock geology. This area occurs at the northern margin of the historic Upper Mississippi Valley lead and zinc mining district. Paleozoic strata are folded into a regionally-significant anticline, and mapping was initiated to...-
Geologic map of the Stitzer and western part of the Montfort 7.5-minute quadrangles, Grant County, Wisconsin
2023
Map: 46.15 in x 36 in, scale 1:24,000
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GIS data for geologic map of the Stitzer and western part of the Montfort 7.5-minute quadrangles, Grant County, Wisconsin [dataset 1]
2023
GIS Data: GeMS file geodatabase, shapefiles, metadata
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Geologic map of the Bloomington and Brodtville 7.5-minute quadrangles, Grant County, Wisconsin
The geologic map of the Bloomington and Brodtville quadrangles includes 1:24,000 scale mapping of both surficial and bedrock geology. There is little structural folding or faulting in this portion of the Driftless Area. Thus, it is ideal for studying the hydrostratigraphic framework of the mapped units. The accompanying report presents stratigraphic...-
Geologic map of the Bloomington and Brodtville 7.5-minute quadrangles, Grant County, Wisconsin
2022
Map: 41 in x 35 in, scale 1:24,000
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GIS data for the geologic map of the Bloomington and Brodtville 7.5-minute quadrangles, Grant County, Wisconsin [dataset 1]
2022
GIS Data: File geodatabase
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Geologic map of the Castle Rock and Long Hollow 7.5-minute quadrangles, Grant County, Wisconsin
The geologic map of the Castle Rock and Long Hollow quadrangles includes 1:24,000 scale mapping of both surficial and bedrock geology. The accompanying report presents new observations about bedrock folds and fracture sets in this portion of the Driftless Area that lies just north of the main Upper Mississippi Valley zinc-lead mineral district. The...-
Geologic map of the Castle Rock and Long Hollow 7.5-minute quadrangles, Grant County, Wisconsin (revised 2022)
2022
Map: 48 in x 36 in, scale 1:24,000
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GIS data for the geologic map of the Castle Rock and Long Hollow 7.5-minute quadrangles, Grant County, Wisconsin [dataset 1]
2022
GIS Data: File geodatabase
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Geologic Map of the Baraboo 7.5-Minute Quadrangle, Sauk County, Wisconsin
The Baraboo quadrangle, records where glaciers stopped in the east-central Baraboo Hills. On this map, 1:24,000 scale, Precambrian igneous and metasedimentary rocks are overlain by Paleozoic sedimentary rocks and, more recently, by glacial deposits. Superb exposures of all three can be found in Devils Lake State Park and Parfreys Glen State Natural Area.-
Geologic Map of the Baraboo 7.5-Minute Quadrangle, Sauk County, Wisconsin
2021
Map: 35 in x 37 in, scale 1:24,000
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Geologic Map of the Rock Springs 7.5-Minute Quadrangle, Sauk County, Wisconsin
The Rock Springs quadrangle is located in the western Baraboo Hills of south-central Wisconsin. This map, 1:24,000 scale, conveys the rich Precambrian through Quaternary history present on the ground. Here, ancient rocks metamorphosed and folded and were later displaced by a series of faults. Although never glaciated, an ice sheet 8 kilometers to the east...-
Geologic Map of the Rock Springs 7.5-Minute Quadrangle, Sauk County, Wisconsin
2021
Map: 40 in x 36.5 in, scale 1:24,000
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Geologic Map of the North Freedom 7.5-Minute Quadrangle, Sauk County, Wisconsin
The North Freedom quadrangle is located on the South Range of the Baraboo Hills in south-central Wisconsin. The Baraboo Hills are recognized for their ecologic and geologic significance, with superb exposure of Precambrian and Paleozoic rocks and Quaternary sediments. Mapping focused on the Precambrian section, building on past work by subdividing and...-
Geologic Map of the North Freedom 7.5-Minute Quadrangle, Sauk County, Wisconsin
2020
Map: 40 in x 37 in, scale 1:24,000
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GIS Data for the Geologic Map of the North Freedom 7.5-Minute Quadrangle, Sauk County, Wisconsin (version 2) [dataset 1]
2020
GIS Data: GeMS file geodatabase, shapefiles, and metadata. Supersedes previous file geodatabase format (DI version 1)
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Publications Catalog
Wisconsin Geological and Natural History Survey
