Silica Formation Unit 24 (24A,24B) (Devonian of the United States)
Where: Ohio (41.7° N, 83.7° W: paleocoordinates 36.4° S, 31.0° W)
• coordinate based on nearby landmark
• local area-level geographic resolution
When: Silica Formation, Givetian (387.7 - 382.7 Ma)
• group of beds-level stratigraphic resolution
Environment/lithology: marine; pyritic, gray, argillaceous limestone
• Overall sequence: Bioclastic limestone; argillaceous limestone; shale. This unit: 24A: "limestone, very argillaceous, gray, containting scattered marcasite...pyritized concretions...at top and base"; 24B: "limestone, extremely argillaceous, weathering into angular fragments, gray"
Primary reference: R. V. Kesling and R. B. Chilman. 1975. Strata and megafossils of the Middle Devonian Silica Formation. University of Michigan Papers on Paleontology 8:1-408 [M. Foote/M. Foote/M. Foote]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 38472: authorized by Michael Foote, entered by Michael Foote on 21.04.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
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Rhynchonellata | |
Stenolaemata | |