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Large's Clay Pit, Sanilac Co., Michigan, USAi
Regional Level Types
Large's Clay PitPit
Sanilac Co.County

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Latitude & Longitude (WGS84): 43° 12' 37'' North , 82° 58' 5'' West
Latitude & Longitude (decimal): 43.21028,-82.96806
GeoHash:G#: dptjb40w0
Locality type:Pit
Köppen climate type:Dfb : Warm-summer humid continental climate
Nearest Settlements:
Brown City1,274 (2017)1.8km
Melvin174 (2017)9.0km
Peck613 (2017)13.3km
Marlette1,801 (2017)15.8km
Yale1,905 (2017)16.4km

Commodities (Major) - Clay - Fire (Refractory)
Development Status: Past Producer

Regions containing this locality

North America PlateTectonic Plate

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.

No minerals currently recorded for this locality.

List of minerals for each chemical element

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on

251.902 - 541 Ma

ID: 3187973
Paleozoic sedimentary rocks

Age: Phanerozoic (251.902 - 541 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

323.2 - 358.9 Ma

ID: 2831765
Marshall Sandstone

Age: Mississippian (323.2 - 358.9 Ma)

Stratigraphic Name: Marshall Sandstone

Description: Secondary unit description from USGS Geologic Names lexicon (ref. MI016): Marshall Sandstone consists of a lower Marshall and Napoleon member. The upper member is recognizable only in exposures in the southern part of the basin. The Marshall conformably overlies the Coldwater Shale and conformably underlies the Michigan Formation. The total thickness of the Marshall appears to be vary between 40 and 110 m , the maximum occurring near the basin center in Ionia Co. Thins toward west and north. The upper, or Napoleon Sandstone Member reaches its maximum thickness of 49 to 61 m in the southern part of the basin . Generally, the Marshall is sparsely fossiliferous, sometimes cross-bedded and rippled, very fine- to coarse-grained sandstone of buff, tan, or gray color. The Napoleon is predominantly a medium-grained sandstone with some coarse sand intervals. It is nonfossiliferous and commonly cross-bedded and rippled. The lower Marshall, on the other hand, is mostly fine-grained sandstone with some very fine sand intervals, It is fossiliferous and generally flat-bedded. Age is Osagean.

Comments: Original map source: Cannon, W.F., Kress, T.H., Sutphin, D.M., Morey, G.B., Meints, Joyce, and Barber-Delach, Robert, 1997, Digital Geologic Map and mineral deposits of the Lake Superior Region, Minnesota, Wisconsin, Michigan: USGS Open-File Report 97-455 (version 3, Nov. 19

Lithology: Major:{sandstone}, Minor:{siltstone}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License


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Brown, George G. (1924) Clays and Shales of Michigan and Their Uses, Michigan Geological Survey Publication 36, p. 371.

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