ARCO Wunderlich #1 - North Dakota Geo Survey Well #8803: Richmondian, North Dakota
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Stenolaemata
- Cryptostomata
- Arthrostylidae
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Sceptropora facula
Ulrich 1888
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28.4 %-specimens | ||||||
Sceptropora florida
Kiepura 1962
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28.4 %-specimens | ||||||
Arthroclema pentagonalis
Lobdell 1992
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1.5 %-specimens | ||||||
Arthroclema brevis
Lobdell 1992
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28.2 %-specimens | ||||||
Nematoporella falcata
Lobdell 1992
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2.0 %-specimens | ||||||
Nematoporella ulrichi
Lobdell 1992
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1.1 %-specimens | ||||||
Ulrichostylus costatus
Lobdell 1992
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2.0 %-specimens | ||||||
Ulrichostylus dakotensis
Lobdell 1992
|
8.3 %-specimens | ||||||
see common names |
Geography
Country: | United States | State/province: | North Dakota |
Coordinates: | 47.9° North, 100.9° West (view map) | ||
Paleocoordinates: | 11.3° South, 61.0° West | ||
Basis of coordinate: | based on nearby landmark | ||
Geographic resolution: | outcrop |
Time
Period: | Ordovician | Epoch: | Late/Upper Ordovician |
10 m.y. bin: | Ordovician 5 | ||
Key time interval: | Richmondian | ||
Age range of interval: | 449.50000 - 443.70000 m.y. ago |
Stratigraphy
Formation: | Stony Mountain | Member: | Gunn |
Stratigraphic resolution: | member |
Lithology and environment
Primary lithology: | shelly/skeletal lithified packstone | ||
Secondary lithology: | gray lithified calcareous "shale" | ||
Includes fossils? | Y | ||
Includes fossils? | Y | ||
Lithology description: "thin, relatively pure bioclastic limestone interbedded with calcareous shale or very argillaceous limestone. The shale or argillaceous limestone is largel reddish purple in outcrop. In the subsurface, it is medium olive gray or pinkish gray in eastern North Dakota, becoming darker olive gray in the central part of the state and almost black in the deepest wells in western North Dakota." | |||
Environment: | deep subtidal indet. | Tectonic setting: | cratonic basin |
Geology comments: environment based on type section of Gunn Member north of Stony Mountain, Manitoba |
Taphonomy
Modes of preservation: | body,original calcite |
Size of fossils: | macrofossils |
Collection methods and comments
Collection excludes: | some macrofossils |
Reason for describing collection: | taxonomic analysis |
Museum repositories: | USNM |
Metadata
Database number: | 64602 | ||
Authorizer: | S. Holland | Enterer: | S. Holland |
Modifier: | S. Holland | Research group: | marine invertebrate |
Created: | 2006-09-10 16:57:46 | Last modified: | 2006-09-10 20:13:13 |
Access level: | the public | Released: | 2006-09-10 16:57:46 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
18639. | 1% 5060 | F.K. Lobdell. 1992. Arthrostylidae (Bryozoa: Cryptostomata) fromthe Gunn Member, Stony Mountain Formation (Upper Ordovician), North Dakota and Manitoba. North Dakota Geological Survey Miscellaneous Series 76:99-115 [S. Holland/S. Holland] |