DescriptionWaldron Shale (Middle Silurian) (St. Paul Stone Quarry, St. Paul, Indiana, USA) 4 (21833021510).jpg
Gray shales in the Silurian of Indiana, USA.
The St. Paul Stone Quarry in St. Paul, Indiana, USA has four Middle Paleozoic stratigraphic units exposed along the walls:
Geneva Dolomite Member of the Jeffersonville Limestone (Lower Devonian)
Louisville Limestone (Middle Silurian)
Waldron Shale (Middle Silurian)
Laurel Member of the Salamonie Dolomite (Middle Silurian)
The above photo shows gray-colored shales - this is the Waldron Shale (Middle Silurian), which is richly fossiliferous in many places.
Stratigraphy: Waldron Shale, upper Niagaran Series (upper Wenlockian), Middle Silurian
Locality: St. Paul Stone Quarry, 1 mile northwest of the town of St. Paul & 1.75 miles southeast of the town of Waldron, southeastern Shelby County, southeast-central Indiana, USA (39° 26' 09.22" North, 85° 38' 38.66" West)
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