D1576 CO, E. of Groom Mine: Whiterockian, Nevada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Hormogoneae
- Oscillatoriales
- Girvanellaceae
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Girvanella indet.
Nicholson and Etheridge 1878
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Tergomya
- Tryblidiida
- Tryblidiidae
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cf. Propilina indet.
Kobayashi 1933
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Gastropoda
- Euomphalina
- Ophiletidae
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Euomphalacea indet.
White 1877
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= Rossospira harrisae
Rohr 1994
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Wagner 2023 | |||||||||
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Gastropoda
- Euomphalina
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Macluritacea indet.
(Carpenter 1861)
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Gastropoda
- Euomphalina
- Macluritidae
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Palliseria indet.
Wilson 1924
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= Palliseria robusta
Wilson 1924
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Wagner 2023 | |||||||||
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Maclurites indet.
Le Sueur 1818
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= Monitorella auricula
Rohr 1994
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Wagner 2023 | |||||||||
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Gastropoda
- Murchisoniina
- Eotomariidae
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Trochonema (Eunema) indet.
(Salter 1859)
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= ? Clathrospira ? glindmeyeri
Rohr 1996
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Wagner 2023 | |||||||||
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Gastropoda
- Murchisoniina
- Lophospiridae
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Lophospira indet.
Whitfield 1886
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= Lophospira perangulata
Hall 1847
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Wagner 2023 | |||||||||
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Gastropoda
- Bellerophontida
- Tropidodiscidae
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Groomodiscus rossi n. gen., n. sp.
Rohr and Yochelson 1990
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4 specimens | |||||||||
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Rhynchonellata
- Orthida
- Anomalorthidae
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Anomalorthis ? resoi
Ross 1970
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Ross 1970 | |||||||||
| Ross | ||||||||||
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Anomalorthis nevadensis
Ulrich and Cooper 1938
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Ross 1970 | |||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Nevada | County: | Lincoln |
| Coordinates: | 37.3° North, 115.8° West (view map) | ||||
| Paleocoordinates: | 6.9° South, 81.8° West | ||||
| Geographic resolution: | small collection |
Time
| Period: | Ordovician | ||
| 10 m.y. bin: | Ordovician 2-4 | ||
| *Period: | Middle Ordovician | *Local age/stage: | Middle Whiterockian |
| Key time interval: | Whiterockian | Brachiopod zone: | Zone M |
| Age range of interval: | 470 - 457 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Geological group: | Pogonip | Formation: | Antelope Valley | Member: | Anomalorthis Zone |
| Regional section: | Antelope Valley Formation | Regional bed: | 261 m | ||
| Regional order: | top to bottom | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: 261 m. below top of Antelope Valley Fm.; 12 m above base of a sequence of very fossiliferous, bioclastic limestone; Kanoshian (middle Whiterockian). Zone M (Anomalorthis) | |||||
Lithology and environment
| Primary lithology: | "limestone" |
| Lithology description: Very fossiliferous bioclastic limestone with beds from 15-60 cm thick | |
| Environment: | shallow subtidal indet. |
| Geology comments: "The presence of abundant pelmatozoan plates indicates normal marine salinity, and the underlying and overlying beds are oncolitic (Girvanella), suggesting shallow, higher energy conditions. | |
Taphonomy
| Modes of preservation: | body,replaced with silica |
| Size of fossils: | macrofossils,mesofossils |
Collection methods and comments
| Collection excludes: | all microfossils,some macrofossils |
| Collection methods: | selective quarrying,chemical,field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | USNM |
| Taxonomic list comments:Gastropods only. | |
Metadata
| Also known as: | USGS coll. #D-1576-CO (Ross, 1970)l SF 71 | ||
| Database number: | 13605 | ||
| Authorizer: | A. Miller, P. Wagner | Enterer: | R. Krause, P. Wagner |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2002-04-15 16:53:18 | Last modified: | 2019-08-18 15:39:43 |
| Access level: | the public | Released: | 2002-04-15 16:53:18 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 6130. | D. M. Rohr and E. L. Yochelson. 1990. An unusual new Bellerophontacean Gastropod from the Ordovician (Whiterockian) of Nevada. Journal of Paleontology 64(6):956-960 [A. Miller/R. Krause/P. Wagner] |
Secondary references:
| 25411 | R. J., J.r. Ross. 1970. Ordovician Brachiopods, Trilobites, and Stratigraphy in Eastern and Central Nevada. United States Geological Survey Professional Paper 639:1-99 [S. Finnegan/S. Finnegan/P. Wagner] | |
| 9042 | P. J. Wagner. 2023. Paleozoic Gastropod, Rostroconch, Helcionelloid and Tergomyan Database (2006 - 2023). [P. Wagner/P. Wagner/P. Wagner] |