Northeast corner of section 28, Post Township: Richmondian, Iowa

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Rhynchonellata - Orthida - Plaesiomyidae
Plaesiomys subquadratus occidentalis
Wright and Stigall 2013
see common names

Geography
Country:United States State/province:Iowa County:Winneshiek
Coordinates: 43.1° North, 91.5° West (view map)
Paleocoordinates:19.1° South, 115.0° West (Wright 2013)
Basis of coordinate:based on political unit
Geographic resolution:outcrop
Time
Period: Ordovician Epoch: Late Ordovician
Stage: Katian 10 m.y. bin: Ordovician 5
Key time interval: Richmondian Graptolite zone:  Amplexograptus manitoulinensis
Age range of interval: 449.6 - 445.5 m.y. ago
Stratigraphy
Geological group:Maquoketa Formation:Scales Shale Member:Elgin
Stratigraphic resolution:group of beds
Stratigraphy comments: Upper part of member
Lithology and environment
Primary lithology: "limestone"
Lithology description: Limestone, occasional shale partings. Lithology from C. O. Leverson, A. J. Gerk, R. E. Sloan, & L. A. Bisagno. General section of the Middle and Late Ordovician strata of Northeastern Iowa, Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35, p.25-39. Edited by R. E. Sloan.
Environment:carbonate indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Museum repositories:USNM
Metadata
Database number:192095
Authorizer:P. Wagner Enterer:P. Wagner
Research group:marine invertebrate
Created:2018-03-08 12:30:56 Last modified:2025-02-22 15:12:02
Access level:the public Released:2018-03-08 12:30:56
Creative Commons license:CC0
Reference information

Primary reference:
52181. Y. Wang. 1949. Maquoketa Brachiopoda of Iowa. Geological Society of America Memoir 42:1-55 [P. Wagner/P. Wagner]

Secondary references:

64957 D. F. Wright and A. L. Stigall. 2013. Phylogenetic revision of the Late Ordovician orthid brachiopod genera Plaesiomys and Hebertella from Laurentia. Journal of Paleontology 87(6):1107-1128 [P. Wagner/P. Wagner]