Collinson Brothers Quarry, Rock Island Co., Illinois, USA
Latitude & Longitude (WGS84): | 41° 26' 15'' North , 90° 33' 35'' West |
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Latitude & Longitude (decimal): | 41.43771,-90.55985 |
GeoHash: | G#: 9zreer824 |
Locality type: | Quarry |
Köppen climate type: | Dfa : Hot-summer humid continental climate |
Other/historical names associated with this locality: | Milan Quarry |
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Mineral List
5 valid minerals.
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 Macrostrat.org
Paleozoic 252.17 - 541 Ma ID: 3187973 | Paleozoic sedimentary rocks Age: Paleozoic (252.17 - 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] |
Givetian - Eifelian 382.7 - 393.3 Ma ID: 2849560 | Muscatatuck Group Age: Middle Devonian (382.7 - 393.3 Ma) Stratigraphic Name: Dutch Creek Sandstone; Geneva Dolomite; Tioga Bentonite Bed; Hoing Sandstone Description: Muscatatuck Group, includes Grand Tower Limestone and St. Laurent (Alto and Lingle) Formation in southern Illinois; includes Detroit River Formation, Wapsipinicon Limestone, and Cedar Valley Limestone in northern and western Illinois. Comments: Thickness from stratigraphic columns: Grand Tower Ls (0-230’), St. Laurent (Alto and Lingle) Fm (0-200’) in southern Illinois (south of 40 degrees north latitude); Detroit River Fm (0-30’), Wapsipinicon Ls (0-100’), and Cedar Valley Ls (0-100’) in northern Illinois (north of 40 degrees north latitude). In southern Illinois, the units (from oldest to youngest) are the Grand Tower Limestone and St. Laurent (Alto and Lingle) Formation: the Grand Tower Ls includes, from oldest to youngest, the Dutch Creek Sandstone, Geneva Dolomite, and Tioga K-bentonite Bed; and the St. Laurent (Alto and Lingle) Fm includes "Hoing" and "Hibbard". In northern Illinois, the the Detroit River Fm and Wapsipinicon Ls (equivalents) are overlaid by the Cedar Valley Ls: the Hoing Ss occurs at the base of the Cedar Valley Ls. [Oil well drillers' terms shown in quotation marks.] Lithology: Major:{limestone}, Minor:{dolostone,sandstone,bentonite} 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] |
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