|Latitude & Longitude (WGS84):||38° 17' 0'' North , 87° 10' 35'' West|
|Latitude & Longitude (decimal):||38.28333,-87.17639|
|Köppen climate type:||Cfa : Humid subtropical climate|
The noted minerals were found in conjunction with a fossil fish dig at a high wall in an abandoned strip mine in the Pennsylvanian-age Excello Shale. The black shale of the Excello contains mineralogically complex phosphate nodules, primarily fluorapatite that can be several centimeters across. Fluorapatite is also a component of fossil fish scales in the shale. Many of the reported phosphate minerals are likely formed during weathering of the exposed nodules. The hawleyite occurs as yellow powdery coatings along joint surfaces, as do some of the phosphates. The Excello Shale extends in outcrop away from the dig, and it is possible that similar mineral suites can be found at other nearby areas. The locality is within the Patoka State Fish and Wildlife Area, and collecting shouldn’t be done with permission of the area’s manager.
10 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
252.17 - 541 Ma
|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. 
298.9 - 323.2 Ma
Age: Pennsylvanian (298.9 - 323.2 Ma)
Stratigraphic Name: Carbondale Group
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.