Bromide Formation, Mountain Lake Member (Lower Zone), Oklahoma: Blackriveran, Oklahoma

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Eocrinoidea - Palaeocystitidae
may be Carabocrinus
Rhombifera - Echinosphaeritidae
Echinosphaerites aurantium (Gyllenhaal 1772)
Rhombifera - Callocystitidae
Rhombifera - Cheirocrinidae
Rhombifera - Glyptocystitidae
Glyptocystites sp. n. sp. Billings 1854
unclassified
may be Cheirocrinus of Sinclair, 1948
Rhombifera - Glyptocystitidae
Crinoidea - Hybocrinida - Hybocrinidae
Hybocrinus nitidus Sinclair 1945
Crinoidea - Porocrinida
Carabocrinus sp. Billings 1857
Crinoidea - Dendrocrinida - Dendrocrinidae
Crinoidea - Homocrinida - Homocrinidae
Ectenocrinus sp. Miller 1889
Crinoidea - Calceocrinida - Calceocrinidae
Crinoidea - Monobathrida - Glyptocrinidae
Crinoidea - Diplobathrida - Rhodocrinitidae
Archaeocrinus spp. Wachsmuth and Springer 1881
some species may not be Archaeocrinus
Crinoidea - Diplobathrida - Cleiocrinidae
Cleiocrinus regius Billings 1857
Glyptosphaeritida - Eumorphocystidae
Paracrinoidea - Platycystitida - Platycystitidae
Platycystites sp. n. sp. Miller 1889
Paracrinoidea - Comarocystitida - Amygdalocystitidae
Edrioasteroidea - Cyathocystida - Cyathocystidae
see common names

Geography
Country:United States State/province:Oklahoma
Coordinates: 34.0° North, 97.0° West (view map)
Paleocoordinates:13.6° South, 124.8° West (Wright 2013)
Basis of coordinate:based on nearby landmark
Geographic resolution:local area
Time
Period: Ordovician Epoch: Late Ordovician
10 m.y. bin: Ordovician 4-5
*Period:Middle Ordovician *Local age/stage:Blackriveran
Key time interval: Blackriveran
Age range of interval: 457.3 - 449.6 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Bromide Member:Mountain Lake
Stratigraphic resolution:member
Stratigraphy comments: Mountain Lake Member, Lower Zone
Lithology and environment
Primary lithology:gray sandstone
Secondary lithology:gray "shale"
Includes fossils?Y
Includes fossils?Y
Lithology description: "[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.
Environment:marine indet.
Glacial or sequence phase:transgressive
Geology comments: Upper and lower shoreface; transition zone; shallow lagoonal; shallow shelf or carbonate ramp. Environments from M. W. Longman. 1982. Depositional environments. Echinoderm faunas from the Bromide Formation (Middle Ordovician) of Oklahoma: Lawrence, Kansas, University of Kansas Paleontological Institute Monograph 11 : 17-29. Edited by J. Sprinkle.
Taphonomy
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:biostratigraphic analysis
Taxonomic list comments:Stratigraphic positions of Bromide echinoderms as used by authors from 1903-1980.
Metadata
Database number:23990
Authorizer:S. Holland Enterer:T. Hanson
Modifier:S. Holland Research group:marine invertebrate
Created:2002-07-25 10:47:16 Last modified:2025-02-22 15:12:02
Access level:the public Released:2002-07-25 10:47:16
Creative Commons license:CC0
Reference information

Primary reference:
6790. R. O. Fay, A. A. Graffham, and J. Sprinkle. 1982. Previous studies of Bromide echinoderms. In J. Sprinkle (ed.), Echinoderm faunas from the Bromide Formation (Middle Ordovician) of Oklahoma: Lawrence, Kansas, University of Kansas Paleontological Institute Monograph 11 34-44 [S. Holland/T. Hanson/S. Bruning]