St. Paul, Decorah Shales: Rocklandian, Minnesota

List of taxa
Where & when
Taphonomy & methods
Metadata & references
Taxonomic list
Rostroconchia - Ribeirioida - Technophoridae
Technophorus divaricatus Ulrich 1892
Ulrich 1892
Gastropoda - Bellerophontida - Sinuitidae
Protowarthia pervoluta Ulrich and Scofield 1897
Ulrich and Scofield 1897
recombined as Sinuites pervoluta
Gastropoda - Bellerophontida - Bucaniidae
Conradella obliqua Ulrich and Scofield 1897
Ulrich and Scofield 1897
recombined as Phragmolites obliquus
Gastropoda - Bellerophontida - Pterothecidae
Carinaropsis phalera (Sardeson 1892)
Ulrich and Scofield 1897
synonym of Carinaropsis cymbula
Tergomya - Archinacellida - Archinacellidae
Archinacella deleta (Sardeson 1892)
Ulrich and Scofield 1897
Stenolaemata - Trepostomida
Batostoma winchelli Ulrich 1893
Batostoma winchelli spinulosum
Stenolaemata - Cryptostomata - Ptilodictyonidae
Escharopora subrecta Ulrich 1886
Stenolaemata - Trepostomata - Halloporidae
Hallopora undulata Ulrich 1886
see common names

Country:United States State/province:Minnesota
Coordinates: 45.0° North, 93.1° West (view map)
Paleocoordinates:17.9° South, 62.7° West
Basis of coordinate:estimated from map
Period:Ordovician Epoch:Late/Upper Ordovician
10 m.y. bin:Ordovician 4
Key time interval:Rocklandian
Age range of interval:460.90000 - 449.50000 m.y. ago
Formation:Decorah Member:Spechts Ferry
Stratigraphic resolution:member
Stratigraphy comments: "Black River (Decorah) Shales", in Bassler (1911)
This shale is supposed to be equivalent to the Sprechts Ferry shale from elsewhere in Minnesota.
Lithology and environment
Primary lithology: "shale"
Environment:marine indet.
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Collection excludes:some genera
Reason for describing collection:taxonomic analysis
Database number:167573
Authorizer:B. Kröger, P. Wagner Enterer:B. Kröger, P. Wagner
Modifier:P. Wagner
Created:2015-03-24 11:47:21 Last modified:2018-05-12 11:55:40
Access level:the public Released:2015-03-24 11:47:21
Creative Commons license:CC BY
Reference information

Primary reference:

54585. R. S. Bassler. 1911. The early Paleozoic Bryozoa of the Baltic Provinces. Bulletin of the United States National Museum 77:1-375 [B. Kröger/B. Kröger]

Secondary references:

15875 E. O. Ulrich. 1892. New Lammelibranchiata, No. 4. Descriptions of one new genus and eight new species. American Geologist 10(2):96-104 [P. Wagner/P. Wagner]
11411 E. O. Ulrich and W. H. Scofield. 1897. The Lower Silurian Gastropoda of Minnesota. The Paleontology of Minnesota 39(2):813-1081 [P. Wagner/P. Wagner/P. Wagner]