Abra de Santa Laura F-2, Sierra de Mojotoro, Floresta Formation, Jujuy: Tremadoc, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Rhynchonellata
- Orthida
- Plectorthidae
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Lipanorthis santalaurae n. sp.
Benedetto and Carrasco 2002
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50 specimens | ||||||
| see common names | |||||||
Geography
| Country: | Argentina |
| Coordinates: | 24.5° South, 65.3° West (view map) |
| Paleocoordinates: | 44.0° South, 129.4° West |
| Basis of coordinate: | estimated from map |
| Geographic resolution: | small collection |
Time
| 10 m.y. bin: | Cambrian-Ordovician | ||
| Key time interval: | Tremadoc | Trilobite zone: | Bienvillia tetragonalis-Conophrys minutula |
| Age range of interval: | 485.00000 - 477.70000 m.y. ago |
Stratigraphy
| Formation: | Floresta | ||||
| Local section: | Abra de Santa Laura | Local bed: | shell bed F-2 | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: "The record of Kainella meridionalis from the immediately underlying sandstone beds (see Fig. 2), as well as the graptolite and trilobite evidence from other exposures of the Floresta Formation (Moya et al., 1994; Moya, 1998), allow to refer the brachiopod-bearing coquinite (level F2, Fig. 2) to the uppermost part of the K. meridionalis Zone or, more probably, to the Bienvillia tetragonalis-Conophrys minutula Zone (Fig. 3). The age of the latter, as stated above, can be confidently referred to the P. deltifer Zone, while the former falls within the C. angulatus Zone (Aceñolaza and Albanesi, 1997; Albanesi et al., 2001; Moya et al., 1994; Tortello and Rao, 2000)." | |||||
Lithology and environment
| Primary lithology: | lithified sandstone |
| Secondary lithology: | lithified siltstone |
| Lithology description: light-green siltstones interbedded with fine-grained sandstones; with calcareous coquinite (level F-2) | |
| Environment: | coastal indet. |
Taphonomy
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | good |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 66188 | ||
| Authorizer: | W. Kiessling | Enterer: | U. Merkel |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2006-10-04 05:37:07 | Last modified: | 2014-08-11 09:40:49 |
| Access level: | the public | Released: | 2006-10-04 05:37:07 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 18957. | J. L. Benedetto and P. A. Carrasco. 2002. Tremadoc (earliest Ordovician) brachiopods from Purmamarca and the Sierra de Mojotoro, Cordillera Oriental of northwestern Argentina. Géobios 35:647-661 [W. Kiessling/U. Merkel/J. Alroy] |