Loc. P1-A. On the Lawrence uplift, about 2 miles southeast of Lawrence Quarry: Hirnantian, Oklahoma

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Rhynchonellata - Pentamerida - Virgianidae
Brevilamnulella thebesensis (Savage 1913)
Rhynchonellata - Orthida - Hesperorthidae
Dolerorthis savagei Amsden 1974
Chileata - Dictyonellida - Eichwaldiidae
Dictyonella sp. Hall 1868
replaced by Eodictyonella
Bivalvia - Modiomorphida - Modiomorphidae
? Modiolopsis sp. Hall 1847
see common names

Geography
Country:United States State/province:Oklahoma County:Pontotoc
Coordinates: 34.4° North, 97.2° West (view map)
Paleocoordinates:22.0° South, 68.4° West
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period:Ordovician Epoch:Late/Upper Ordovician
Stage:Hirnantian 10 m.y. bin:Ordovician 5
Key time interval:Hirnantian
Age range of interval:445.20000 - 443.80000 m.y. ago
Stratigraphy
Formation:Keel Member:Ideal Quarry
Local section:P1 Local bed:1-5 m
Local order:bottom to top
Lithology and environment
Primary lithology:ooidal "limestone"
Lithology description: Brown weathering bioclastic calcarenite grading upwards into an oolitic limestone. Thin sections show' much fossil debris, mostly pelmatozoan plates, set in a matrix which is partly clear calcite, partly brownish\vnish, finely divided cHl'b:mate. Color Ull a \Yeathel'ed surface is an olive gray (5Y 6/1) mottled ,,,ith light-brown (5Y 6/4), which on a fresh surface becomes a light-brown (GYR 4/4 to 5YR 5/6). One insoluble residue, 1.3%; residue mostly a rusty brown, spongy material, possibly limonite, with some silicified fossil debris. Dolomite content 1(;'\'1', less than 1%.
Environment:sand shoal
Geology comments: concentric oolites with well develped radial and concentric structures set in a matric of spar or micrite, grading in places to an organo-detrital limestone
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:general faunal/floral analysis
Taxonomic list comments:Brachiopods only.
Metadata
Database number:151949
Authorizer:P. Wagner Enterer:P. Wagner
Modifier:P. Wagner Research group:marine invertebrate
Created:2013-10-23 23:00:39 Last modified:2013-10-23 23:06:10
Access level:the public Released:2013-10-23 23:00:39
Creative Commons license:CC BY
Reference information

Primary reference:
187. T. W. Amsden. 1974. Late Ordovician and Early Silurian articulate brachiopods from Oklahoma, southwestern Illinois, and eastern Missouri. Bulletin - Oklahoma Geological Survey 119:1-154 [J. Alroy/M. Sommers/M. Uhen]