Where: Iowa (42.0° N, 94.0° W: paleocoordinates 19.4° S, 65.5° W)
• coordinate estimated from map
• basin-level geographic resolution
When: Beecher Member (Dunleith Formation), Shermanian (457.3 - 449.6 Ma)
• member-level stratigraphic resolution
Environment/lithology: limestone
• Environmental call by T. Hanson
• 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
Size class: microfossils
Collection methods: chemical,
Primary reference: F. M. Swain. 1987. Middle and Upper Ordovician Ostracoda of Minnesota and Iowa. In R. E. Sloan (ed.), Minnesota Geological Survey Report of Investigations 35:99-101 [S. Holland/T. Hanson/S. Bruning]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 23217: authorized by Steven Holland, entered by Tori Hanson on 10.07.2002
Creative Commons license: CC BY (attribution)
Taxonomic list
Show authors, comments, and common names
unclassified |
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Ostracoda |
Palaeocopida - Cryptophyllidae |
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Palaeocopida - Bassleratiidae |
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Palaeocopida - Beyrichiidae |
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Palaeocopida - Leperditellidae |
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Palaeocopida - Bolliidae |
Bollia subaequata, Dicranella bicornis, Dicranella marginata, Dicranella spinosa, Dicranella simplex, Dicranella typa, Maratia sp., Maratia mara, Maratia micula, Parenthatia camerata, Parenthatia punctata
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Palaeocopida - Aechminidae |
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Palaeocopida - Circulinidae |
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Palaeocopida - Drepanellidae |
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Palaeocopida - Primitiopsidae |
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Palaeocopida - Eurychilinidae |
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Palaeocopida - Oepikellidae |
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Palaeocopida - Hollinidae |
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Palaeocopida - Tetradellidae |
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Palaeocopida - Euprimitiidae |
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Palaeocopida - Tvaerenellidae |
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Palaeocopida - Aparchitidae |
Bullatella granilabiatus, Macronotella arcta, Macronotella scofieldi, Saccelatia angularis, Saccelatia arcuamuralis, Saccelatia arrecta, Saccelatia cletifera, Aparchites carinatus, Aparchites chatfieldensis, Aparchites paratumida, Aparchites fimbriatus, Aparchites macrus
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Palaeocopida - Schmidtellidae |
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Podocopida - Bythocyprididae |
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Podocopida - Bairdiidae |
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Podocopida - Bairdiocyprididae |
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