State | Iowa |
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Name | Wapsipinicon Group |
Geologic age | Middle Devonian, upper Eifelian-middle Givetian |
Lithologic constituents |
Major
Sedimentary > Carbonate > Limestone (Bed)dense, “sublithographic”, part laminated to intraclastic; minor part peloidal to fossiliferous (Otis Fm); inciental oolitic, (Otis Fm)
Sedimentary > Carbonate > Dolostone (Bed)part laminated, variably argillaceous, part fetid; fossil-moldic to vuggy (Otis-Spillville fms); shaly, gray to green-gray, part silty-sandy
Minor
Sedimentary > Clastic > Sedimentary-breccia (Bed, Calcareous)limestone/dolomite breccia (evaporite collapse)
Sedimentary > Clastic > Mudstone > Shale (Bed)dolomitic, gray to green-gray, part silty-sandy
Incidental
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Chemical > Chert (Bed)chert and chalcedony nodules (Pinicon Ridge Fm)
|
References | Witzke, Brian J., Anderson, Raymond R., and Pope, John P., 2010, Iowa Geological and Water Survey, DNR, Bedrock Geologic Map of Iowa, OFM-2010-1. Scale 1:500,000. |
NGMDB product | |
Counties | Benton - Black Hawk - Bremer - Buchanan - Cedar - Chickasaw - Clayton - Delaware - Fayette - Floyd - Howard - Jackson - Johnson - Jones - Linn - Louisa - Mitchell - Muscatine - Scott - Winneshiek |