Silica Formation Unit 5A (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; shelly/skeletal, gray, blue, argillaceous limestone

• Overall sequence: Bioclastic limestone; argillaceous limestone; shale. This unit: "limestone, massive, slightly argillaceous, blue-gray; composed of bands of brachiopod debris"

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 38454: authorized by Michael Foote, entered by Michael Foote on 21.04.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Myalinida - Ambonychiidae
Lophonychia cordata Stewart 1933 clam
 Ostreida - Pterineidae
 Modiomorphida - Modiomorphidae
Modiomorpha concentrica Conrad 1838 clam
Modiomorpha mytiloides Conrad 1841 clam
Gastropoda
 Euomphalina - Platyceratidae
"Platyostoma lineatum" = Platyostoma lineata
"Platyostoma lineatum" = Platyostoma lineata Conrad 1842 snail
Cephalopoda
 Barrandeocerida - Nephriticeratidae
 Nautilida - Centroceratidae
? Centroceras sp. Hyatt 1884 nautiloid
 Oncocerida - Acleistoceratidae
Stenolaemata
 Trepostomata -
Strophomenata
 Productida - Chonetidae
 Strophomenida - Strophodontidae
"Strophodonta "demissa"" = Strophodonta (Strophodonta) demissa Conrad 1842
Rhynchonellata
 Spiriferinida - Cyrtinidae
 Spiriferida - Spinocyrtiidae
 Spiriferida - Mucrospiriferidae
 Atrypida - Atrypidae
  - Tropidoleptidae
 Orthida - Schizophoriidae
Anthozoa
 Auloporida - Aulocystidae
Aulocystis lucasensis tabulate coral
 Favositida - Favositidae
Emmonsia arbuscula tabulate coral
Emmonsia radiciformis tabulate coral
Favosites hamiltoniae tabulate coral
Favosites turbinatus tabulate coral
 Favositida - Pachyporidae
Cladopora roemeri tabulate coral
 Cystiphyllida - Cystiphyllidae
 Stauriida - Amplexidae
 Stauriida - Disphyllidae
 Stauriida - Phillipsastreidae
 Stauriida - Zaphrentidae
Heliophyllum halli Edwards and Haime 1851 horn coral
 Stauriida - Eridophyllidae
 Stauriida - Bethanyphyllidae