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Rhynchonellata
- Spiriferida
- Acrospiriferidae
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Rhynchonellata
- Spiriferida
- Spiriferidae
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Rhynchonellata
- Atrypida
- Atrypidae
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Bivalvia
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| see common names |
| Country: | Peru |
| Coordinates: |
17.1° South, 71.8° West (view map) |
| Paleocoordinates: | 68.2° South, 86.8° West (Wright 2013) |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | local area |
| Period: | Devonian |
Epoch: | Early Devonian |
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10 m.y. bin: | Devonian 1-2 |
| Key time interval: | Early Devonian |
| Age range of interval: | 419.2 - 393.3 m.y. ago |
| Formation: | Lutitas Cocachacra |
| Stratigraphic resolution: | member |
| Stratigraphy comments: Authors tentatively suggest correlation with Emsian Floresta Fmn. in Colombia. |
| Primary lithology: | fine,micaceous sandstone |
| Secondary lithology: | brown cherty/siliceous siltstone |
| Includes fossils? | Y |
| Lithology description: "Devonian...consists of alower, conglomeratic unit...overlain by an upper unit of quartzite and finer-grained rocks, the "Lutitas Cocachacra"...the conglomeratic unit is polymictic...Above the conglomerate are quartzites and fine-grained, indurated and slabby beds of the Cocachacra lutites [about 30-40 m thick] [which] might represent reworked, silicified volcanic material [containing quartz, biotite, and muscovite]...The fossils occur in dark brown, flinty siltstone..." |
| Environment: | marine indet. |
| Reason for describing collection: | biostratigraphic analysis |
| Database number: | 36141 |
| Authorizer: | M. Foote |
Enterer: | M. Foote |
| Modifier: | M. Foote |
Research group: | marine invertebrate |
| Created: | 2004-01-14 10:08:47 |
Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public |
Released: | 2004-01-14 10:08:47 |
| Creative Commons license: | CC0 |
| 9699. | | A. J. Boucot, P. E. Isaacson, and G. Laubacher. 1980. An Early Devonian, Eastern Americas Realm faunule from the coast of southern Peru. Journal of Paleontology 54(2):359-365 [M. Foote/M. Foote/M. Foote] |