Tarija Concha Fm., Tarija Concha and Tilcara, Bolivia: Tremadoc, Bolivia
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Trilobita
- Asaphida
- Remopleurididae
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Apatokephalus sp.
Brögger 1896
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Trilobita
- Olenida
- Olenidae
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Triarthrus tetragonalis
(Harrington 1938)
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| see common names | |||||||
Geography
| Country: | Bolivia |
| Coordinates: | 21.0° South, 65.0° West (view map) |
| Paleocoordinates: | 33.0° South, 160.5° West (Wright 2013) |
| Geographic resolution: | local area |
Time
| Period: | Ordovician | Epoch: | Early Ordovician |
| Stage: | Tremadocian | 10 m.y. bin: | Ordovician 1 |
| *Period: | Early/Lower Ordovician | *Epoch: | Late/Upper Tremadoc |
| *International age/stage: | Late/Upper Tremadoc | ||
| Key time interval: | Tremadoc | ||
| Age range of interval: | 486.4 - 477.1 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Tarija Concha |
| Stratigraphic resolution: | formation |
Lithology and environment
| Primary lithology: | lithified "shale" |
| Secondary lithology: | siltstone |
| Lithology description: alternating shales, siltstone, and sandstone of varying colors | |
| 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 | |
| Taxonomic list comments:Trilobite systematics and biostrat. | |
Metadata
| Database number: | 8840 | ||
| Authorizer: | A. Miller | Enterer: | P. Novack-Gottshall |
| Modifier: | J. Alroy | Research group: | marine invertebrate |
| Created: | 2000-09-01 11:05:42 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2000-11-20 13:53:40 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 675. | R. Suarez Soruco. 1976. El sistema ordovicico en Bolivia. Revista Tecnica YPF Bolivia 5(2):111-123 [A. Miller/P. Novack-Gottshall/M. Uhen] |