Ferganella Community, Behr Quarry, Welton, Iowa.: Telychian, Iowa
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
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Lechritochoceras sp.
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Trilobita
- Phacopida
- Calymenidae
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Calymenidae indet.
Milne-Edwards 1840
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Trilobita
- Corynexochida
- Illaenidae
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Bumastus sp.
Murchison 1839
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Stenopareia sp.
Holm 1886
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Gastropoda
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Gastropoda indet.
Cuvier 1795
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Gastropoda
- Euomphalina
- Platyceratidae
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Platyceras sp.
Conrad 1840
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Cephalopoda
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Nautiloidea indet.
Agassiz 1847
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Cephalopoda
- Oncocerida
- Acleistoceratidae
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Amphicyrtoceras sp.
Foerste 1924
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Cephalopoda
- Orthocerida
- Orthoceratidae
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Michelinoceras sp.
Foerste 1932
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Cephalopoda
- Orthocerida
- Dawsonoceratidae
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Dawsonoceras sp.
Hyatt 1884
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Cephalopoda
- Orthocerida
- Kionoceratidae
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Kionoceras sp.
Hyatt 1884
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Strophomenata
- Strophomenida
- Rafinesquinidae
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Leptaena sp.
Dalman 1828
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Strophomenata
- Strophomenida
- Sowerbyellidae
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Eoplectodonta sp.
Kozlowski 1929
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Strophomenata
- Strophomenida
- Strophodontidae
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Protomegastrophia profunda
(Hall 1852)
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recombined as Brachyprion (Protomegastrophia) profunda | ||||||||||
Strophomenata
- Orthotetida
- Chilidiopsidae
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Coolinia sp.
Bancroft 1949
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spelled with current rank as Fardenia (Coolinia) | ||||||||||
name corrected from "Coolina" | ||||||||||
Rhynchonellata
- Atrypida
- Atrypidae
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Plectatrypa sp.
Schuchert and Cooper 1930
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Atrypa reticularis
(Linnaeus 1758)
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original and current combination Anomia reticularis | ||||||||||
species name in quotes | ||||||||||
Rhynchonellata
- Spiriferida
- Cyrtiidae
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Cyrtia exporrecta
(Wahlenberg 1818)
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recombined as Cyrtia exporrectus | ||||||||||
Hedeina sp.
Boucot 1957
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Eospirifer radiatus
(Sowerby 1834)
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Rhynchonellata
- Rhynchonellida
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Rhynchonellida indet.
Kuhn 1949
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Rhynchonellata
- Rhynchonellida
- Trigonirhynchiidae
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Rhynchotreta sp.
Hall 1879
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Rhynchonellata
- Rhynchonellida
- Machaerariidae
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Ferganella sp.
Nikiforova 1937
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Rhynchonellata
- Protorthida
- Skenidiidae
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? Skenidioides sp.
Schuchert and Cooper 1931
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Rhynchonellata
- Orthida
- Platystrophiidae
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Platystrophia sp.
King 1850
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Rhynchonellata
- Orthida
- Dalmanellidae
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Resserella sp.
Bancroft 1928
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Isorthis sp.
Kozlowski 1929
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Rhynchonellata
- Orthida
- Rhipidomellidae
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Dalejina sp.
Havlicek 1953
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Rhynchonellata
- Pentamerida
- Camerellidae
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Camerella sp.
Billings 1859
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Rhynchonellata
- Pentamerida
- Gypidulidae
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Gypidulidae indet.
Schuchert and Le Vene 1929
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sp. 1 and 2 | ||||||||||
Rhynchonellata
- Athyridida
- Meristellidae
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Whitfieldella sp.
Hall and Clarke 1893
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Meristina sp.
Hall 1867
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unclassified
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Bryozoa indet.
Ehrenberg 1831
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crustose forms | ||||||||||
Stenolaemata
- Cryptostomata
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Cryptostomata indet.
Vine 1884
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branching forms | ||||||||||
Stenolaemata
- Cryptostomata
- Rhinoporidae
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Lichenalia sp.
Hall 1851
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Stenolaemata
- Cryptostomata
- Fenestellidae
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Fenestellidae indet.
King 1850
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Anthozoa
- Cystiphyllida
- Tryplasmatidae
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Porpites sp.
Schlotheim 1820
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Anthozoa
- Stauriida
- Streptelasmatidae
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Streptelasmatidae indet.
(Nicholson 1889)
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Streptelasmidae | ||||||||||
Anthozoa
- Heliolitida
- Halysitidae
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Halysites sp.
von Waldheim 1813
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Anthozoa
- Heliolitida
- Heliolitidae
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Heliolites sp.
Dana 1846
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see common names |
Geography
Country: | United States | State/province: | Iowa |
Coordinates: | 41.9° North, 90.6° West (view map) | ||
Paleocoordinates: | 21.3° South, 55.8° West | ||
Basis of coordinate: | based on political unit | ||
Geographic resolution: | outcrop |
Time
Period: | Silurian | Epoch: | Llandovery |
Stage: | Telychian | 10 m.y. bin: | Silurian 1 |
*International age/stage: | Late/Upper Telychian | ||
Key time interval: | Telychian | ||
Age range of interval: | 438.50000 - 433.40000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Formation: | Scotch Grove | Member: | Welton | ||
Stratigraphic resolution: | member | ||||
Stratigraphy comments: Welton Member, approximate middle part of Scotch Grove Formation. |
Lithology and environment
Primary lithology: | dolomitic,shelly/skeletal wackestone | ||
Secondary lithology: | dolomitic,shelly/skeletal packstone | ||
Includes fossils? | Y | ||
Includes fossils? | Y | ||
Lithology description: "...occurs in dolomitized skeletal-moldic crinoidal wackestones to packstones." | |||
Environment: | deep subtidal ramp | Tectonic setting: | cratonic basin |
Glacial or sequence phase: | highstand systems tract | ||
Geology comments: "..grains generally unabraded..brachiopods [and crinoid cups] commonly articulated..suggest quiet setting below normal wave base...some evidecne for periodic bottom disturbance by storms...slightly shallower than Costistricklandia-Eospirifer community...above BA 4 communities in the lower Welton and below BA 3 Pentameroides comm. inn the middle Scotch Grove...stratigraphic position suggests BA 3 to inner BA 4..." |
Taphonomy
Collection methods and comments
Collection excludes: | some macrofossils |
Reason for describing collection: | paleoecologic analysis |
Collection method comments: Abundances given in Table 50.3. Echinoderms, which dominate the community, are not listed (see Frest et al. 1999--PBDB ref. 4379). |
Metadata
Database number: | 24969 | ||
Authorizer: | M. Foote | Enterer: | M. Foote |
Modifier: | M. Foote | Research group: | marine invertebrate |
Created: | 2002-08-23 15:36:08 | Last modified: | 2006-09-15 15:14:05 |
Access level: | the public | Released: | 2002-08-23 15:36:08 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
7006. | B. J. Witzke and M. E. Johnson. 1999. Silurian brachiopod and related benthic communities from carbonate platform and mound environments of Iowa and surrounding areas. In A. J. Boucot and J. D. Lawson (eds.), Paleocommunities--a case study from the Silurian and Lower Devonian 806-840 [M. Foote/M. Foote/M. Foote] |