Rock River Stone Quarry, Joslin, Rock Island Co., Illinois, USA
|Latitude & Longitude (WGS84):||41° 32' 47'' North , 90° 16' 30'' West|
|Latitude & Longitude (decimal):||41.54639,-90.27500|
|Köppen climate type:||Dfa : Hot-summer humid continental climate|
A quarry located 4.6 km (2.8 miles) WSW of Joslin.
REF:Deposit:: POR IS HILLSDALE, ILLINOIS
Deposit:: MSHA PRODUCERS LIST 11/82
Deposit:: RCF AND CMS LISTS 10/81
Commodities (Major) - Stone - Crushed/Broken
Development Status: Producer
Commodity ListThis is a list of exploitable or exploited mineral commodities recorded at this locality.
2 valid minerals.
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
|Pridoli - Llandovery|
419.2 - 443.8 Ma
|Silurian System undivided|
Age: Silurian (419.2 - 443.8 Ma)
Stratigraphic Name: Sexton Creek Limestone; St. Clair Limestone; Moccasin Springs Formation; Wilhelmi Formation; Elwood Dolomite; Kankakee Dolomite; Joliet Dolomite; Sugar Run Dolomite; Racine Dolomite; Mosalem; Tete des Morts Dolomite; Blanding Dolomite; Sweeney Dolomite; Marcus Dolomite; Racine Dolomite
Description: Silurian System undivided, includes Sexton Creek Limestone, St. Clair Limestone, and Moccasin Springs Formation in southern Illinois; includes Wilhelmi Formation, Elwood Dolomite, Kankakee Dolomite, Joliet Dolomite, Sugar Run Dolomite, and Racine Dolomite in northeastern Illinois; includes Mosalem, Tete des Morts, Blanding, Sweeney, Marcus, and Racine Dolomites in northwestern Illinois.
Comments: Thickness from stratigraphic columns (listed from oldest to youngest): Bowling Green Dol (0-50'), Sexton Creek Ls (0-125’), St. Clair Ls (0-150’) (of which the seventy-Six Shale Mbr occurs at the base), Moccasin Springs Fm (0-1,000’) in southern Illinois (south of 40 degrees north latitude); Wilhelmi Fm (0-100’), Elwood Dol (0-30’), Kankakee Dol (0-50’), Joliet Dol (0-80’), Sugar Run Dol (0-30’), and Racine Dol (0-300') in northern Illinois (north of 40 degrees north latitude); Mosalem Fm (0-100’), Tete des Morts Dol (0-24’), Blanding Dol (0-50’), Sweeney Dol (0-55’), Marcus Dol (0-45’), and Racine Dol (0-300’) in northwestern Illinois. The Schweizer Mbr occurs at the base of the Wilhelmi Fm and the Birds Mbr at the top; the Kankakee Dolomite is comprised, from oldest to youngest, of the Drummond, Offerman, Troutman, and Plaines Members; and the Joliet Dolomite is comprised, from oldest to youngest, of the Brandon Bridge, Markgraf, and Romeo Members. Unit name in original GIS (Esri shapefile IL_Geologic_Units_500K_2005_Py) is 'Silurian System'; name on Legend of geologic map is 'Silurian System undivided'.
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.