Section 16. Near Preston: Richmondian, Iowa

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Rhynchonellata - Orthida - Plectorthidae
Hebertella sinuata (Hall 1847)
Hebertella sinuata prestonensis
Wright and Stigall 2013
see common names

Geography
Country:United States State/province:Iowa County:Jackson
Coordinates: 42.1° North, 90.4° West (view map)
Paleocoordinates:20.4° South, 114.9° West (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:basin
Time
Period: Ordovician Epoch: Late Ordovician
Stage: Katian 10 m.y. bin: Ordovician 5
Key time interval: Richmondian
Age range of interval: 449.6 - 445.5 m.y. ago
Stratigraphy
Geological group:Maquoketa Formation:Brainard
Stratigraphic resolution:formation
Stratigraphy comments: Originally given as Brainard member of Maquoketa. C5E- C6.
Lithology and environment
Primary lithology:blue poorly lithified "shale"
Includes fossils?Y
Lithology description: Blue and bluish~ gray shale: with some intimately associated beds of limestone at the top and bottom of the division.
Environment:carbonate indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Museum repositories:USNM
Metadata
Database number:219794
Authorizer:P. Wagner Enterer:P. Wagner
Research group:marine invertebrate
Created:2021-04-21 18:20:06 Last modified:2025-02-22 15:12:02
Access level:the public Released:2021-04-21 18:20:06
Creative Commons license:CC0
Reference information

Primary reference:
11632. H. S. Ladd. 1929. The stratigraphy and paleontology of the Maquoketa shale of Iowa. Annual Report of the State Geologist 34:305-448 [P. Wagner/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]