Chacay Melehue (Early Callovian): Early/Lower Callovian, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Ammonitida
- Perisphinctidae
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Choffatia jupiter
(Steinmann 1881)
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Neuqueniceras steinmanni
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Cephalopoda
- Ammonitida
- Sphaeroceratidae
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Eurycephalites vergarensis
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Eurycephalites rotundus
(Tornquist 1898)
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Xenocephalites gottschei
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Stehnocephalites gerthi
(Spath 1928)
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Bivalvia
- Myalinida
- Inoceramidae
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Retroceramus stehni n. sp.
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| see common names | |||||||
Geography
| Country: | Argentina | State/province: | Nequen |
| Coordinates: | 37.2° South, 70.5° West (view map) | ||
| Paleocoordinates: | 34.5° South, 32.4° West | ||
| Geographic resolution: | outcrop |
Time
| Period: | Jurassic | Epoch: | Middle Jurassic |
| Stage: | Callovian | 10 m.y. bin: | Jurassic 5 |
| *Period: | Middle Jurassic | ||
| *International age/stage: | Early/Lower Callovian | ||
| Key time interval: | Early/Lower Callovian | Zone: | Vergarensis and Bodenbenderi |
| Age range of interval: | 165.30000 - 161.50000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Stratigraphic resolution: | member | ||||
| Stratigraphy comments: formation name not given one collection in six is from the latest Bathonian Steinmanni Zone | |||||
Lithology and environment
| Primary lithology: | concretionary "shale" |
| Lithology description: dark shales with concretionary levels and thin intercalated tuffaceous beds | |
| Environment: | marine indet. |
| Geology comments: inoceramids preserved as internal molds no paleoenvironmental data | |
Taphonomy
Collection methods and comments
| Collection excludes: | some macrofossils |
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Taxonomic list comments:composite of material from at least six collections spanning nearly 100 m list ends with the phrase "and others" | |
Metadata
| Database number: | 4883 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy | Research group: | marine invertebrate |
| Created: | 1999-08-28 18:00:38 | Last modified: | 2017-05-23 16:34:15 |
| Access level: | the public | Released: | 2000-11-20 13:53:24 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 298. | S. E. Damborenea. 1990. Middle Jurassic inoceramids from Argentina. Journal of Paleontology 64(5):736-759 [J. Alroy/J. Alroy/J. Alroy] |