Silica Formation Unit 11 (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; gray, calcareous shale

• Overall sequence: Bioclastic limestone; argillaceous limestone; shale. This unit: "shale, calcareous, gray, many marcasite concretions, weathering into angular fragments"

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 38462: authorized by Michael Foote, entered by Michael Foote on 21.04.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Phacopida - Phacopidae
"Phacops rana" = Eldredgeops rana
"Phacops rana" = Eldredgeops rana Green 1832 trilobite
Malacostraca
 Archaeostraca -
Bivalvia
 Pectinida - Pterinopectinidae
 Ostreida - Pterineidae
 Modiomorphida - Modiomorphidae
 Solenida - Orthonotidae
Orthonota undulata Conrad 1841 clam
 Lucinida - Mactromyidae
Gastropoda
 Euomphalina - Platyceratidae
"Platyceras (Platyostoma) cf. lineatum" = Platyostoma lineata
"Platyceras (Platyostoma) cf. lineatum" = Platyostoma lineata Conrad 1842 snail
Tentaculita
 Styliolinida - Styliolinidae
Stenolaemata
 Cyclostomata - Hederellidae
 Cyclostomata -
 Cystoporida - Sulcoreteporidae
 Cryptostomata - Arthrostylidae
 Cryptostomata - Hyphasmoporidae
 Trepostomata - Atactotoechidae
Stenuroidea
 Parophiurina -
Antiquaster magrumi Kesling 1971
Blastoidea
 Fissiculata - Phaenoschismatidae
Crinoidea
 Taxocrinida - Taxocrinidae
 Inadunata - Poteriocrinidae
 Monobathrida -
 Camerata - Rhodocrinidae
Lophophorata
 Tentaculitida - Tentaculitidae
Strophomenata
 Productida - Chonetidae
Rhynchonellata
 Spiriferinida - Cyrtinidae
 Spiriferida - Mucrospiriferidae
 Spiriferida - Hysterolitidae
Lingulata
  -
Lingulata indet. Gorjansky and Popov 1985
Anthozoa
 Auloporida - Aulocystidae
Aulocystis flabellata tabulate coral
 Auloporida - Auloporidae