Where: Johnston County, Oklahoma (34.5° N, 96.5° W: paleocoordinates 22.5° S, 73.1° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Pygodus anserinus conodont zone, Mountain Lake Member (Bromide Formation), Turinian (457.3 - 453.8 Ma)
• group of beds-level stratigraphic resolution
Environment/lithology: deep subtidal; lithified, gray sandstone and lithified, gray shale
•"[B]asal tan to greenish-gray fine-grained quartz arenite sandstone, with well-rounded and frosted grains, overlain by a sandstone and greenish-gray illitic-chloritic shale above. The sandstone sequence is thickest (more than 37 m) along Lick Creek in the northwestern Arbuckles and thinnest (less than 9 m) in the eastern Arbuckles, losing sand at the top of the section. The overlying shale and limestone is thickest (more than 60 m) along the axis of aulacogen and is mostly shale. In a comparable section in the northeastern Arbuckles, limestone predominates with some sand, and the section is 24 to 31 m thick." Lithology from R, O. Fay and A. A. Graffman. 1982. Stratigraphic studies. Echinoderm faunas from the Bromide Formation (Middle Ordovician) of Oklahoma: Lawrence, Kansas, University of Kansas Paleontological Institute Monograph 11 : 11-16. Edited by J. Sprinkle.
Size class: microfossils
Reposited in the USNM
Collection methods: sieve,
Primary reference: G. A. Cooper. 1956. Chazyan and related brachiopods. Smithsonian Miscellaneous Collections 127:1-1245 [P. Wagner/P. Wagner]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 186181: authorized by Pete Wagner, entered by Pete Wagner on 16.06.2017
Creative Commons license: CC BY (attribution)
Taxonomic list
Crinoidea | |
Bromidocrinus nodosus n. gen. n. sp.1
| |
Hesperocystis deckeri2 Sinclair 1945 | |
Eocrinoidea | |
Bromidocystis bassleri2 Sprinkle 1982 | |
Strophomenata | |
Onychoplecia tenuis n. sp.
Onychoplecia tenuis n. sp. Cooper 1956 | |
Rhynchonellata | |
"Protozyga elongata" = Manespira elongata
"Protozyga elongata" = Manespira elongata Cooper 1956 | |
Glyptorthis uncinata Cooper 1956 |