Near mill 1 mile northwest of Fort Atkinson: Richmondian, Iowa

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Rhynchonellata - Orthida - Glyptorthidae
Glyptorthis pulchra n. sp. Wang 1949
see common names

Geography
Country:United States State/province:Iowa
Coordinates: 43.2° North, 91.9° West (view map)
Paleocoordinates:18.9° South, 115.2° 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:Maquoketa Member:Brainard
Stratigraphic resolution:formation
Stratigraphy comments: Wang's summary suggests Elgin or Clairmont; however, Wright & Stigall (2014) state Richmondian.
Lithology and environment
Primary lithology:blue poorly lithified "shale"
Includes fossils?Y
Lithology description: Greenish-blue to bluish-gray soft shale. Lithology from 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.
Geology comments: Environmental call by T. Hanson.
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:164471
Authorizer:P. Wagner Enterer:P. Wagner
Modifier:P. Wagner Research group:marine invertebrate
Created:2014-12-02 14:47:55 Last modified:2025-02-22 15:12:02
Access level:the public Released:2014-12-02 14:47:55
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:

53634 D. F. Wright and A. L. Stigall. 2014. Species-level phylogenetic revision of the Ordovician orthide brachiopod Glyptorthis from North America. Journal of Systematic Palaeontology 12(8):893-906 [P. Wagner/P. Wagner/P. Wagner]