Delthyris elevata-Howellella elegans Community in Holmestrand District: Sheinwoodian, Norway

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Trilobita - Phacopida - Calymenidae
Calymenidae indet. Milne-Edwards 1840
Ostracoda - Leperditicopida - Leperditiidae
Herrmannina sp. Kegel 1933
Strophomenata - Strophomenida - Rafinesquinidae
Leptaena depressa (Sowerby 1824)
recombined as Leptaena (Leptaena) depressa
Rhynchonellata - Spiriferida - Delthyrididae
Delthyris elevata Dalman 1828
Howellella elegans Muir-Wood 1925
Rhynchonellata - Athyridida - Athyrididae
cf. Glassina sp. Hall and Clarke 1893
Rhynchonellata - Rhynchonellida - Machaerariidae
Ferganella borealis (Buch 1834)
recombined as Stegerhynchus borealis
Rhynchonellata - Rhynchonellida - Rhynchotrematidae
Ferganella diodonta (Dalman 1828)
recombined as Stegerhynchus diodontus
Rhynchonellata - Rhynchonellida - Trigonirhynchiidae
Microsphaeridiorhynchus ? nucula (Sowerby 1839)
Rhynchotreta cuneata (Dalman 1828)
Rhynchonellata - Atrypida - Glassiidae
cf. Glassia cf. laeviuscula
Bivalvia - Ostreida - Pterineidae
Actinopteria sowerbyi
Pteronitella retroflexa
Cephalopoda - Orthocerida
Orthoceratida indet. (Kuhn 1940)
original and current combination Orthocerida
Orthoceratid sp. A
see common names

Geography
Country:Norway
Coordinates: 68.8° North, 15.0° East (view map)
Paleocoordinates:12.2° South, 9.5° West
Basis of coordinate:based on nearby landmark
Geographic resolution:local area
Time
Period:Silurian Epoch:Wenlock
Stage:Sheinwoodian 10 m.y. bin:Silurian 2
*International age/stage:Late/Upper Sheinwoodian - Early/Lower Homerian
Key time interval:Sheinwoodian
Age range of interval:433.40000 - 430.50000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Steinsfjorden
Stratigraphic resolution:formation
Stratigraphy comments: Middle part of Steinsfjorder Fmn., Late Sheinwoodian or Early Homerian.
Lithology and environment
Primary lithology: argillaceous "carbonate"
Includes fossils?Y
Lithology description: "This is a low diversity comm. developed in carbonates where brachiopods are eurytopic (present in most communities in the succession)..."
Environment:marine indet.
Geology comments: "The facies represent a low energy, muddly lagoonal environment with periodically stagnant waters, as indicated by pseudomorphs of sulfate minerals, although these minerals might be more suggestive of within sediment conditions rather than sediment surface and overlying water conditions. In similar environments, where the sed. rate was high and the bottom v. soft, the Microsphaeridiorhynchus nucula Comm. usually replaced this one. this is probably a BA 2 to 3 unit."
Taphonomy
Collection methods and comments
Collection excludes:some macrofossils
Reason for describing collection:paleoecologic analysis
Collection method comments: Table 22.4 gives absolute and relative abundances.
Taxonomic list comments:Some taxa not listed to genus level.
Metadata
Database number:14275
Authorizer:M. Foote Enterer:M. Foote
Modifier:M. Foote Research group:marine invertebrate
Created:2002-05-29 13:08:28 Last modified:2006-09-15 15:14:05
Access level:the public Released:2002-05-29 13:08:28
Creative Commons license:CC BY
Reference information

Primary reference:

6308. B. G. Baarli, H. B. Keilen, and M. E. Johnson. 1999. Silurian communities of the Oslo Region, Norway. In A. J. Boucot and J. D. Lawson (eds.), Paleocommunities--a case study from the Silurian and Lower Devonian 327-349 [M. Foote/M. Foote/P. Wagner]