Sardeson Collection, Scales Shale, Elgin Member, Illinois and Iowa: Edenian - Maysvillian, Illinois, Iowa
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Strophomenata
- Orthotetida
- Triplesiidae
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Oxoplecia ulrichi
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Strophomenata
- Strophomenida
- Sowerbyellidae
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Eoplectodonta saxea
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Sowerbyella minnesotensis
(Sardeson 1892)
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Eoplectodonta recedens
(Sardeson 1892)
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recombined as Thaerodonta recedens | ||||||||||
Strophomenata
- Strophomenida
- Furcitellidae
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Megamyonia unicostata
(Meek and Worthen 1868)
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Strophomenata
- Strophomenida
- Rafinesquinidae
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Rafinesquina nitans
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Rafinesquina deltoidea
(Conrad 1838)
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Rafinesquina trentonensis
(Hall 1847)
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Strophomenata
- Strophomenida
- Strophomenidae
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Strophomena trilobita
(Owen 1852)
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recombined as Strophomena trilobata | ||||||||||
Strophomena occidentalis
(Foerste 1912)
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Strophomena cf. fluctuosa
Billings 1860
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recombined as Nasutimena fluctuosa | ||||||||||
Rhynchonellata
- Rhynchonellida
- Rhynchotrematidae
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Lepidocyclus capax
(Conrad 1842)
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recombined as Hiscobeccus capax | ||||||||||
Rhynchonellata
- Orthida
- Plaesiomyidae
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Austinella kankakensis
(McChesney 1861)
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Plaesiomys subquadrata
(Hall 1847)
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recombined as Plaesiomys subquadratus | ||||||||||
Plaesiomys proavita
(Winchell and Schuchert 1892)
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Rhynchonellata
- Orthida
- Glyptorthidae
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Glyptorthis bellarugosa
(Conrad 1843)
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Glyptorthis insculpta
(Hall 1847)
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Rhynchonellata
- Orthida
- Heterorthidae
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? Eremotrema emacerata
(Hall 1860)
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recombined as Heterorthina emacerata | ||||||||||
Rhynchonellata
- Orthida
- Dalmanellidae
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Paucicrura rogata
(Sardeson 1892)
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Paucicrura corpulenta
(Sardeson 1892)
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? Onniella porrecta
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Rhynchonellata
- Orthida
- Platyorthidae
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Diceromyonia ignota
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Rhynchonellata
- Atrypida
- Anazygidae
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Zygospira modesta
(Hall 1847)
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Lingulata
- Lingulida
- Pseudolingulidae
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? Pseudolingula iowensis
(Owen 1844)
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Lingulata
- Lingulida
- Obolidae
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Lingulops sp.
Hall 1871
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Lingulata
- Lingulida
- Lingulasmatidae
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Lingula philomela
Billings 1865
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recombined as Lingulasma philomela | ||||||||||
"Lingula" philomela | ||||||||||
Lingulata
- Lingulida
- Discinidae
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Orbiculoidea pelopea
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Trilobita
- Asaphida
- Asaphidae
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Isotelus gigas
(Dekay 1824)
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recombined as Asaphus gigas | ||||||||||
Isotelus iowensis
(Owen 1852)
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Isotelus susae
(Whitfield 1882)
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Trilobita
- Corynexochida
- Illaenidae
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Bumastus orbicaudatus
(Billings 1859)
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Trilobita
- Phacopida
- Encrinuridae
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Encrinuroides vigilans
(Hall 1847)
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recombined as Erratencrinurus vigilans | ||||||||||
Trilobita
- Phacopida
- Cheiruridae
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Ceraurinus icarus
(Billings 1860)
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Ceraurus pleurexanthemus
Green 1832
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Trilobita
- Phacopida
- Calymenidae
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Flexicalymene senaria
(Conrad 1841)
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recombined as Flexicalymene (Flexicalymene) senaria | ||||||||||
Calymene mamillate
(Hall 1861)
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recombined as Thelecalymene mammillata | ||||||||||
Trilobita
- Phacopida
- Pterygometopidae
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Eomonorachus intermedius
(Walcott 1879)
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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 | ||
*Period: | Late/Upper Ordovician | *Local age/stage: | Edenian - Maysvillian |
Key time interval: | Edenian - Maysvillian | Graptolite zone: | Amplexograptus manitoulinensis |
Age range of interval: | 460.90000 - 449.50000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Geological group: | Maquoketa | Formation: | Scales Shale | Member: | Elgin |
Stratigraphic resolution: | member | ||||
Stratigraphy comments: Elgin probably is Maysvillian only. |
Lithology and environment
Primary lithology: | "limestone" |
Includes fossils? | Y |
Lithology description: Limestone, occasional shale partings. Lithology from C. O. Leverson, A. J. Gerk, R. E. Sloan, & L. A. Bisagno. General section of the Middle and Late Ordovician strata of Northeastern Iowa, Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35, p.25-39. Edited by R. E. Sloan. | |
Environment: | carbonate indet. |
Geology comments: Environmental call by T. Hanson. |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils |
Collection methods and comments
Collection methods: | field collection |
Reason for describing collection: | biostratigraphic analysis |
Metadata
Database number: | 23810 | ||
Authorizer: | S. Holland | Enterer: | T. Hanson |
Modifier: | P. Wagner | Research group: | marine invertebrate |
Created: | 2002-07-21 19:08:18 | Last modified: | 2018-03-24 01:03:07 |
Access level: | the public | Released: | 2002-07-21 19:08:18 |
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] |