Mill Creek Section, 6 miles WSW of Mill Creek village, upper mound interval (Ordovician of the United States)

Also known as Reef 1826

Where: Murray County, Oklahoma (34.4° N, 96.9° W: paleocoordinates 21.1° S, 84.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Hintzeia celsaora / Protopliomerella contracta trilobite zone, Calathium Zone Member (Kindblade Formation), Jefferson (485.4 - 468.1 Ma)

• upper mound interval, 425-445 ft. above the base of the formation

• group of beds-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified wackestone and lithified reef rocks

• sponge-algal buildups, up to 3.5 m thick and 15 m wide

Size class: macrofossils

Preservation: replaced with silica

Primary reference: D. F. Toomey and M. H. Nitecki. 1979. Organic buildups in the Lower Ordovician (Canadian) of Texas and Oklahoma. Fieldiana Geology 2:1-181 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 80100: authorized by Wolfgang Kiessling, entered by Uta Merkel on 03.04.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

Renalcis sp. Vologdin
Girvanella sp. Nicholson and Etheridge 1878
Trilobita indet. Walch 1771 trilobite
 Orthida - Finkelnburgiidae
 Murchisoniina - Hormotomidae
cf. Hormotoma sp. Salter 1859 snail
 Endocerida - Proterocameroceratidae
Mcqueenoceras sp. Ulrich and Foerste 1936
 Paleoloricata - Gotlandochitonidae
Eochiton arbucklensis n. sp. Smith and Toomey 1964 chiton
Ivoechiton sp. Bergenhayn 1955 chiton
Ivoechiton calathicolus n. sp. Smith and Toomey 1964 chiton
Ivoechiton oklahomensis n. sp. Smith and Toomey 1964 chiton
Paleochiton kindbladensis n. sp. Smith and Toomey 1964 chiton
Gotlandochiton sp. Bergenhayn 1955 chiton
Gotlandochiton hami n. sp. Smith and Toomey 1964 chiton
 Lithistida - Anthaspidellidae
Archaeoscyphia annulata Rigby 1973 demosponge
 Labechiida - Pulchrilaminidae
  - Receptaculitidae
Calathium sp. Billings 1865