Barrel Spring, Bed D1017CO/D1477CO: Caradoc, California
collected by Wilfrid Davis
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Rhynchonellata
- Orthida
- Plaesiomyidae
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Valcourea sp.
Raymond 1911
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Valcourea cf. plana
Cooper 1956
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Plaesiomys sp.
Hall and Clarke 1892
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= Multicostella sp.
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Ross 1970 | ||||||
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Rhynchonellata
- Orthida
- Orthidae
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Orthambonites sp.
Pander 1830
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Orthambonites decipiens
(Phleger 1933)
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Rhynchonellata
- Orthida
- Hesperorthidae
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Hesperorthis cf. dubia
Cooper 1956
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unclassified
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Bryozoa indet.
Ehrenberg 1831
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Trilobita
- Trinucleida
- Raphiophoridae
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Ampyx sp.
(Dalman 1827)
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| original and current combination Asaphus (Ampyx) | |||||||
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Lonchodomas sp.
Angelin 1854
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Trilobita
- Asaphida
- Asaphidae
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Isotelus spurius
Phleger 1933
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| recombined as Anataphrus spurius | |||||||
| see common names | |||||||
Geography
| Country: | United States | State/province: | California |
| Coordinates: | 37.0° North, 118.0° West (view map) | ||
| Paleocoordinates: | 6.8° South, 81.9° West | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | hand sample |
Time
| Period: | Ordovician | Epoch: | Late/Upper Ordovician |
| 10 m.y. bin: | Ordovician 4-5 | ||
| Key time interval: | Caradoc | ||
| Age range of interval: | 458.40000 - 449.60000 m.y. ago |
Stratigraphy
| Formation: | Barrel Spring | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Listed as Lower Caradoc; local series:Porterfield age; C37, C40 | |||||
Lithology and environment
| Primary lithology: | lenticular poorly lithified "shale" |
| Secondary lithology: | lenticular lithified mudstone |
| Lithology description: Thinly-laminated and shaly to flaggy, grayish-black shale and mudstone, weathers to dark reddish brown or silvery gray | |
| Environment: | lagoonal |
| Geology comments: Lagoonal? | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
| Encrustation: | occasional |
Collection methods and comments
| Reason for describing collection: | biostratigraphic analysis |
| Museum repositories: | USNM |
| Collectors: | Wilfrid Davis |
| Taxonomic list comments:Porterfield age; Dicellograptus sextans zone: correlated with N. gracilis and C. bicornis | |
Metadata
| Database number: | 77182 | ||
| Authorizer: | P. Novack-Gottshall, J. Marcot | Enterer: | P. Hearn, J. Marcot |
| Modifier: | J. Marcot | Research group: | marine invertebrate |
| Created: | 2007-12-28 10:23:15 | Last modified: | 2023-09-06 14:12:13 |
| Access level: | the public | Released: | 2007-12-28 10:23:15 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 25410. | R. J. Ross, Jr. and C. R. Longwell. 1964. Middle and Lower Ordovician Formations in Southernmost Nevada and Adjacent California. United States Geological Survey Bulletin 1180-C:C1-C101 [S. Finnegan/S. Finnegan/J. Marcot] |
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] |