Pisocrinus-Gissocrinus Assoc., Hartung Quarry: Wenlock, Wisconsin
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Anthozoa
- Stauriida
- Zaphrentidae
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Zaphrentidae indet.
Milne-Edwards and Haime 1850
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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 | ||||||||||
Rhynchonellata
- Rhynchonellida
- Trigonirhynchiidae
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Rhynchotreta sp.
Hall 1879
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Rhynchonellata
- Orthida
- Platystrophiidae
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Platystrophia biforata
(Schlotheim 1820)
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recombined as Platystrophia biforatus | ||||||||||
Rhynchonellata
- Orthida
- Dicoelosiidae
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Dicoelosia sp.
King 1850
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Rhynchonellata
- Orthida
- Rhipidomellidae
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Dalejina sp.
Havlicek 1953
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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
- 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 | ||||||||||
Rhynchonellata
- Pentamerida
- Gypidulidae
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Gypidulidae informal indet. A
Schuchert and Le Vene 1929
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gypidulid A | ||||||||||
Gypidulidae informal indet. B
Schuchert and Le Vene 1929
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gypidulid B | ||||||||||
Rhynchonellata
- Pentamerida
- Clorindidae
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Antirhynchonella cf. ventricosa
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Rhynchonellata
- Pentamerida
- Camerellidae
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Camerella sp.
Billings 1859
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Rhynchonellata
- Pentamerida
- Parastrophinidae
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Anastrophia sp.
Hall 1867
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Rhynchonellata
- Spiriferida
- Cyrtiidae
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Hedeina sp.
Boucot 1957
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Eospirifer sp.
Schuchert 1913
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unclassified
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Bryozoa indet.
Ehrenberg 1831
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branching and crustose forms | ||||||||||
Stenolaemata
- Cryptostomata
- Fenestellidae
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Fenestellidae indet.
King 1850
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Trilobita
- Phacopida
- Cheiruridae
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Sphaerexochus roemingeri
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Crinoidea
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Crinoidea indet.
Miller 1821
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Crinoidea
- Diplobathrida
- Lampterocrinidae
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Siphonocrinus nobilis
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Lampterocrinus inflatus
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Crinoidea
- Zophocrinidae
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? Zophocrinus sp.
Miller 1891
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Crinoidea
- Pisocrinida
- Pisocrinidae
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Pisocrinus spp.
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see common names |
Geography
Country: | United States | State/province: | Wisconsin |
Coordinates: | 43.0° North, 87.9° West (view map) | ||
Paleocoordinates: | 23.6° South, 50.9° West | ||
Basis of coordinate: | based on political unit | ||
Geographic resolution: | outcrop |
Time
Period: | Silurian | Epoch: | Wenlock |
10 m.y. bin: | Silurian 2 | ||
Key time interval: | Wenlock | ||
Age range of interval: | 433.40000 - 427.40000 m.y. ago |
Stratigraphy
Formation: | Racine | ||||
Stratigraphic resolution: | member | ||||
Stratigraphy comments: lower-middle Racine Formation. Age range for association stated as Wenlockian-Ludlovian (which corresponds to age range of Racine). I have assigned this to Wenlockian based on other collections from lower-middle Racine [e.g. coll. 13353] treated by this reference as Wenlockian. |
Lithology and environment
Primary lithology: | dolomitic,shelly/skeletal argillaceous wackestone | ||
Secondary lithology: | dolomitic,shelly/skeletal argillaceous lime mudstone | ||
Includes fossils? | Y | ||
Includes fossils? | Y | ||
Lithology description: "occurs in skeletal-moldic dolomudstones to dolowackestones, slightly argillaceous to argillaceous" | |||
Environment: | deep subtidal ramp | Tectonic setting: | cratonic basin |
Geology comments: "skeletal grains non-abraded but disarticulated; skeletal grains from <1-20% of total seidment volume...winnowed debris patches occur, but are rare and small; rare storm rup-up conglomerates; [generally] no evidence of vigorous bottom currents, and aposition well below fairweather wavebase, probably at or below normal storm wavebase, in generall quiet water settings is indicated...significant ichofauna..carbonaceous material...pyrite...The P.-G. Assoc. occupies a quiet water, intermound position within the Racine and Wabash Formations, indicating a depth below BA 3 mounds; a BA 4 psotion is preferred. The abundance of clorindids (Antichynchonella) and Dicoelosia plus some Skenidioides further suggests that the assoc. may range into BA 5."
SEP environmental call based on given information and regional context |
Taphonomy
Collection methods and comments
Reason for describing collection: | paleoecologic analysis |
Collection method comments: Table 45.45, which has counts for one sample from Hartung Quarry. Note that Gissocrinus is not present in this sample. |
Metadata
Database number: | 26815 | ||
Authorizer: | M. Foote | Enterer: | M. Foote |
Modifier: | S. Peters | Research group: | marine invertebrate |
Subset of collection #: | 26816 | ||
Created: | 2002-11-04 10:47:39 | Last modified: | 2003-05-04 12:59:15 |
Access level: | the public | Released: | 2002-11-04 10:47:39 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
4379. | T. J. Frest, C. E. Brett, and B. J. Witzke. 1999. Caradocian-Gedinnian echinoderm associations of Central and Eastern North America. Paleocommunities--a case study from the Silurian and Lower Devonian 638-783 [M. Foote/K. Koverman/P. Wagner] |