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Arnold, Jefferson Co., Missouri, USA

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Latitude & Longitude (WGS84): 38° 24' 8'' North , 90° 23' 12'' West
Latitude & Longitude (decimal): 38.40226,-90.38678
Köppen climate type:Cfa : Humid subtropical climate


A man-made exposure adjacent to a highway, but not a road cut.


Mineral List


6 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

Mississippian
323.2 - 358.9 Ma



ID: 2720730
Meramecian Series

Age: Mississippian (323.2 - 358.9 Ma)

Stratigraphic Name: St. Louis Limestone; Salem Formation; Warsaw Formation

Description: St. Louis Limestone, Salem Formation, Warsaw Formation.

Comments: St. Louis Limestone- (100 ft. max) gray massive limestone; Salem FM- (160 ft. max) cross bedded, argillaceous, oolitic limestone; Warsaw FM- (100ft. max) fossilferous limestone. IN CENTRAL MO- St. Louis Limestone is absent. Warsaw FM is host to Mississippi Valley type Pb-Zn deposits, in the Tri-State District, one of the most productive mining districts in the world. The major commodity is zinc, from sphalerite, galena ore. The Jopin area is noted for large calcite scalenohedrons occurring in vugs of the limestone units.

Lithology: Major:{limestone}

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 Macrostrat.org, used under Creative Commons Attribution 4.0 License



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