Amerada, Herman-May No.1 Fryburg Area 13,231'-13,235' ft: Stairsian, North Dakota
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Conodonta
- Protopanderodontida
- Protopanderodontidae
|
||||||||||
|
Drepanodus sp.
Pander 1856
|
||||||||||
|
Eocrinoidea
|
||||||||||
|
Eocrinoidea indet.
Jaekel 1918
|
||||||||||
| eocrinoids | ||||||||||
|
Lingulata
- Lingulida
- Obolidae
|
||||||||||
|
Lingulella informal sp. undet.
Salter 1866
|
||||||||||
|
Rhynchonellata
- Pentamerida
- Clarkellidae
|
||||||||||
|
Syntrophina sp.
|
||||||||||
|
Rhynchonellata
- Orthida
- Plectorthidae
|
||||||||||
|
Nanorthis putilla
(Walcott 1924)
|
||||||||||
| originally Nanorthis | ||||||||||
|
Gastropoda
- Bellerophontida
- Tropidodiscidae
|
||||||||||
|
Tropidodiscus sp.
Meek and Worthen 1866
|
||||||||||
|
Gastropoda
- Bellerophontida
- Bucanellidae
|
||||||||||
|
Bucanella aff. nana
Meek 1871
|
||||||||||
| originally Bucanella | ||||||||||
|
Gastropoda
- Euomphalina
- Raphistomatidae
|
||||||||||
|
Raphistomina cf. sinclairensis
Kobayashi 1955
|
||||||||||
| originally Raphistomina | ||||||||||
|
Trilobita
- Proetida
- Hystricuridae
|
||||||||||
|
Hystricurus sp.
Raymond 1913
|
||||||||||
|
Trilobita
- Corynexochida
- Leiostegiidae
|
||||||||||
|
Lloydia (Evansaspis) formosa
(Hintze 1953)
|
||||||||||
| originally Lloydia | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | North Dakota | County: | Billings |
| Coordinates: | 48.0° North, 102.9° West (view map) | ||||
| Paleocoordinates: | 11.9° South, 74.5° West | ||||
| Basis of coordinate: | based on political unit | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Ordovician | Epoch: | Early Ordovician |
| Stage: | Tremadocian | 10 m.y. bin: | Ordovician 1 |
| *Period: | Early/Lower Ordovician | *Epoch: | Arenig |
| Key time interval: | Stairsian | Trilobite zone: | Tesselacauda |
| Age range of interval: | 482 - 480.3 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Deadwood | ||||
| Local section: | Herman-May No.1 | Local bed: | 13,231-13,235 ft | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: "L. Ord. m. Arenig"; Zone E | |||||
Lithology and environment
| Primary lithology: | "limestone" | ||
| Secondary lithology: | "shale" | ||
| Lithology description: dense, gray-brown limestone in roller-shaped pebbles in medium-grained limestone, large grains and patches of glauconite abundant; some lenses of fine carbonaceous shales in the glauconite patches, pyrite very rare | |||
| Environment: | transition zone/lower shoreface | Tectonic setting: | passive margin |
| Geology comments: "sh., ls and ss. ? lower shoreface or nearshore shelf lagoon. cratonic shelf" | |||
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
Collection methods and comments
| Reason for describing collection: | biostratigraphic analysis |
| Taxonomic list comments:"Lochman-Balk and Wilson, 1967. Biostrat. lists" | |
Metadata
| Database number: | 414 | ||
| Authorizer: | J. Sepkoski | Enterer: | M. Sommers |
| Modifier: | M. Uhen | Research group: | marine invertebrate |
| Created: | 1998-12-03 14:57:02 | Last modified: | 2017-01-28 15:43:59 |
| Access level: | the public | Released: | 1998-12-03 14:57:02 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 13452. | C. Lochman. 1966. Lower Ordovician (Arenig) faunas from the Williston Basin, Montana and North Dakota. Journal of Paleontology 40(3):512-548 [P. Wagner/P. Wagner/P. Wagner] |