Where: Oklahoma (34.0° N, 97.0° W: paleocoordinates 22.5° S, 73.8° W)
• coordinate based on nearby landmark
• local area-level geographic resolution
When: Mountain Lake Member (Bromide Formation), Blackriveran (457.3 - 449.6 Ma)
• member-level stratigraphic resolution
Environment/lithology: marine; gray sandstone and gray shale
Size class: microfossils
Primary reference: R. O. Fay and A. A. Graffham. 1982. Biostratigraphic and paleontological studies. Echinoderm faunas from the Bromide Formation (Middle Ordovician) of Oklahoma: Lawrence, Kansas, University of Kansas Paleontological Institute Monograph 11 30-33 [S. Holland/T. Hanson/T. Hanson]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 23989: authorized by Steven Holland, entered by Tori Hanson on 25.07.2002
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Poikilofusa plethysticha, Gorgonisphaeridium antiquum, Veryhachium bromidense, Veryhachium irroratum, Baltisphaeridium accinctum, Baltisphaeridium bystrentos, Baltisphaeridium disparicanale, Baltisphaeridium parvigranosum, Baltisphaeridium trophirhapium
Poikilofusa plethysticha acritarchs
Gorgonisphaeridium antiquum acritarchs
Veryhachium bromidense acritarchs
Veryhachium irroratum acritarchs
Baltisphaeridium accinctum acritarchs
Baltisphaeridium bystrentos acritarchs
Baltisphaeridium disparicanale acritarchs
Baltisphaeridium parvigranosum acritarchs
Baltisphaeridium trophirhapium acritarchs | |
Polyancistrodorus | |