Sardeson Collection, Spechts Ferry Formation, Illinois and Iowa: Blackriveran - Rocklandian, Illinois, Iowa
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Lingulata
- Lingulida
- Pseudolingulidae
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Pseudolingula eva
(Billings 1861)
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? Pseudolingula iowensis
(Owen 1844)
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Lingulata
- Lingulida
- Obolidae
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Pachyglossella elderi
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Lingulata
- Lingulida
- Discinidae
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Orbiculoidea cf. lamellosa
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Lingulata
- Lingulida
- Trematidae
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Trematis huronensis
Billings 1865
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Lingulata
- Siphonotretida
- Siphonotretidae
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Schizambon sp.
Walcott 1884
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Craniata
- Craniida
- Craniidae
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Petrocrania trentonensis
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Acanthocrania granulosa
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Acanthocrania setigeria
(Hall 1866)
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| recombined as Acanthocrania setigera | ||||||||||
| [entered as Acanthocrania setigera] | ||||||||||
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Strophomenata
- Strophomenida
- Sowerbyellidae
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Sowerbyella curdsvillensis
(Foerste 1912)
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Strophomenata
- Strophomenida
- Furcitellidae
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Oepikina minnesotensis
(Winchell 1881)
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Trigrammaria winchelli
(Hall and Clarke 1892)
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Strophomenata
- Strophomenida
- Strophomenidae
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Strophomena cf. plattinensis
Fenton 1928
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Rhynchonellata
- Atrypida
- Protozygidae
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Protozyga nicolleti
(Winchell and Schuchert 1892)
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| recombined as Manespira nicolleti | ||||||||||
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Rhynchonellata
- Atrypida
- Anazygidae
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Zygospira lebanonensis
Cooper 1956
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Rhynchonellata
- Rhynchonellida
- Trigonirhynchiidae
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Rostricellula minnesotensis
(Sardeson 1892)
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Rhynchonellata
- Rhynchonellida
- Rhynchotrematidae
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Rhynchotrema ainsliei
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Rhynchonellata
- Orthida
- Draboviidae
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Pionodema circularis
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Pionodema subaequata
(Conrad 1843)
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Rhynchonellata
- Orthida
- Glyptorthidae
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Glyptorthis bellarugosa
(Conrad 1843)
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Rhynchonellata
- Orthida
- Hesperorthidae
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Hesperorthis tricenaria
(Conrad 1843)
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Rhynchonellata
- Orthida
- Plectorthidae
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Doleroides pervetus
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Trilobita
- Corynexochida
- Illaenidae
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Illaenus sp.
Dalman 1827
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Thaleops ovata
Conrad 1843
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Bumastoides sp.
(Whittington 1954)
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Trilobita
- Proetida
- Bathyuridae
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Raymondites longispinus
(Walcott 1876)
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| recombined as Bathyurus (Raymondites) longispinus | ||||||||||
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Trilobita
- Phacopida
- Pterygometopidae
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Eomonorachus intermedius
(Walcott 1879)
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Trilobita
- Phacopida
- Cheiruridae
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Gabriceraurus mifflinensis
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Trilobita
- Asaphida
- Asaphidae
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Isotelus gigas
(Dekay 1824)
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| recombined as Asaphus gigas | ||||||||||
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Isotelus simplex
(Raymond and Narraway 1910)
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Trilobita
- Lichida
- Lichidae
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Amphilichas sp.
Raymond 1905
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| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Illinois, Iowa |
| Coordinates: | 42.0° North, 90.5° West (view map) | ||
| Paleocoordinates: | 21.3° South, 63.6° West | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | basin |
Time
| Period: | Ordovician | Epoch: | Late/Upper Ordovician |
| 10 m.y. bin: | Ordovician 4-5 | ||
| *Period: | Middle Ordovician - Late/Upper Ordovician | *Local age/stage: | Blackriveran - Rocklandian |
| Key time interval: | Blackriveran - Rocklandian | ||
| Age range of interval: | 457.00000 - 449.80000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Spechts Ferry |
| Stratigraphic resolution: | formation |
Lithology and environment
| Primary lithology: | pyritic,green "shale" |
| Includes fossils? | Y |
| Lithology description: "[D]ark-green to green-gray, thin-bedded, soft, locally pyritic shale interbedded with fine- to medium-grained argillaceous limestone." Lithology from O. L. Karklins. 1987. Bryozoa from Rocklandian (Middle Ordovician) rocks of the Upper Mississippi Valley region. Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 :173-176. R. E. Sloan, ed. | |
| Environment: | carbonate indet. |
| Geology comments: Environmental call by T. Hanson. | |
Taphonomy
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
Metadata
| Database number: | 23795 | ||
| Authorizer: | S. Holland | Enterer: | T. Hanson |
| Modifier: | T. Hanson | Research group: | marine invertebrate |
| Created: | 2002-07-21 11:49:42 | Last modified: | 2003-07-18 18:05:03 |
| Access level: | the public | Released: | 2002-07-21 11:49:42 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 6752. | J. A. Catalani. 1987. Biostratigraphy of the Middle and Late Ordovician cephalopods of the Upper Mississippi Valley area. In R. E. Sloan (ed.), Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 187-189 [S. Holland/T. Hanson/S. Bruning] |