Brassfield Fm.: Llandovery, Ohio

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Scaphopoda - Dentaliida - Dentaliidae
Hyolithida - Hyolithidae
originally entered as "? Elegantilites sp."
Bivalvia - Nuculida - Praenuculidae
Palaeoconcha sp. Miller 1889
originally entered as "Palaeoconchia sp."
Praenucula sp. Pfab 1934
Bivalvia - Nuculida - Cardiolariidae
Bivalvia - Solemyida - Ctenodontidae
originally entered as "aff. Ctenodonta sp."
Bivalvia - Nuculanida - Cucullellidae
Bivalvia - Nuculanida - Malletiidae
Bivalvia - Lyrodesmatidae
Lyrodesma sp. Conrad 1841
Gastropoda - Bellerophontida - Bucaniidae
originally entered as "? Bucania sp."
Gastropoda - Bellerophontida - Bucanellidae
Gastropoda - Bellerophontida - Tropidodiscidae
Gastropoda - Murchisoniina - Lophospiridae
Wagner 2023
Loxoplocus or Longstaffia
Gastropoda - Murchisoniina - Eotomariidae
Gastropoda - Murchisoniina - Hormotomidae
originally Murchisonia
Gastropoda - Euomphalina - Holopeidae
originally entered as "? Holopea sp."
Gastropoda - Euomphalina - Platyceratidae
Cephalopoda
Nautiloidea indet. Agassiz 1847
orthoconic cephalopod
see common names

Geography
Country:United States State/province:Ohio County:Adams
Coordinates: 38.8° North, 83.5° West (view map)
Paleocoordinates:31.7° South, 101.3° West (Wright 2013)
Basis of coordinate:based on political unit
Geographic resolution:local area
Time
Period: Silurian Epoch: Llandovery
10 m.y. bin: Silurian 1
*Period:Early/Lower Silurian
Key time interval: Llandovery Zone:  Cycle I
Age range of interval: 443.8 - 433.4 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Brassfield
Stratigraphy comments: "early Sil. upper Llandovery. cycle I. Brassfield Fm.- upper thinnly bedded unit"
Lithology and environment
Primary lithology:current ripples "carbonate"
Secondary lithology: "shale"
Environment:offshore
Geology comments: "sh with coarsely xtaline or ferruginous carbonates; rippling. nearshore. BA2"
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:paleoecologic analysis
Taxonomic list comments:"W.B. Harrison III and L.K. Harrison, 1975. A Maquoketa-like molluscan community in the Brassfield Fm. (early Sil) of Adams Co., OH. Bull. Am. Paleo 67:193-234"
Metadata
Database number:448
Authorizer:J. Sepkoski, P. Wagner Enterer:M. Sommers, P. Wagner
Modifier:J. Ju Research group:marine invertebrate
Created:1998-12-08 17:39:13 Last modified:2025-02-22 15:12:02
Access level:the public Released:1998-12-08 17:39:13
Creative Commons license:CC0
Reference information

Primary reference:
11633. W. B. Harrison and L. K. Harrison. 1975. A Maquoketa-like molluscan community in the Brassfield Formation (Early Silurian) of Adams County, Ohio. Bulletins of American Paleontology 67:193-234 [P. Wagner/P. Wagner/J. Ju]

Secondary references:

9042 P. J. Wagner. 2023. Paleozoic Gastropod, Rostroconch, Helcionelloid and Tergomyan Database (2006 - 2023). [P. Wagner/P. Wagner/P. Wagner]