Pircancha Fm., Tarija and Chilcayo, Bolivia: Arenig, Bolivia
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Pterobranchia
- Graptoloidea
- Phyllograptidae
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Phyllograptus sp.
Hall 1858
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Pterobranchia
- Graptoloidea
- Dichograptidae
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Didymograptus sp.
McCoy 1851
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Agnostida
- Metagnostidae
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Geragnostus sp.
Howell 1935
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Trilobita
- Phacopida
- Calymenidae
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Synhomalonotus sp.
Pompeckj 1898
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Trilobita
- Asaphida
- Asaphidae
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Mekynophrys sp.
Harrington 1938
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Hoekaspis sp.
Kobayashi 1937
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Trilobita
- Trinucleida
- Trinucleidae
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Famatinolithus sp.
Harrington and Leanza 1957
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Rhynchonellata
- Orthida
- Plaesiomyidae
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Dinorthis sp.
Hall and Clarke 1892
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Geography
| Country: | Bolivia |
| Coordinates: | 21.0° South, 65.0° West (view map) |
| Paleocoordinates: | 32.6° South, 166.5° West (Wright 2013) |
| Geographic resolution: | local area |
Time
| Period: | Ordovician | ||
| 10 m.y. bin: | Ordovician 2-3 | ||
| *Period: | Early/Lower Ordovician | *Epoch: | Arenig |
| Key time interval: | Arenig | ||
| Age range of interval: | 477.1 - 468 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Pircancha |
| Stratigraphic resolution: | formation |
Lithology and environment
| Primary lithology: | green lithified "shale" |
| Secondary lithology: | sandstone |
| Lithology description: olive-green lutites and limonites and occasional banks of stratified quartzitic sandstone | |
| Environment: | transition zone/lower shoreface |
Taphonomy
Collection methods and comments
| Reason for describing collection: | biostratigraphic analysis |
| Collection method comments: JA: marked by Novack-Gottshall without explanation as omitting some genera, some macrofossils, some microfossils, and species names, but apparently complete | |
Metadata
| Database number: | 9103 | ||
| Authorizer: | A. Miller | Enterer: | P. Novack-Gottshall |
| Modifier: | J. Alroy | Research group: | marine invertebrate |
| Created: | 2000-09-22 12:51:47 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2000-11-20 13:53:41 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 673. | M. Toro and S. Fernandez. 1979. Los fosiles de la formacion Pircancha aflorante en Chilcayo, Provincio Mendez - Depto. Tarija. Revista de la Academia Nacional de Ciencas de Bolivia 163-169 [A. Miller/P. Novack-Gottshall] |