Quebrada la Carrea: Early/Lower Cretaceous, Chile
collected by G. C. Diaz
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Reptilia
- Pterosauria
- Dsungaripteridae
|
||||||||||
|
Pterodaustro sp.
Bonaparte 1970
|
Casamiquela and Diaz 1978 | 1 individual | ||||||||
| Departmento de Ciencias Geologicas, Antofagasta 250973, incomplete mandible and partial premaxilla | ||||||||||
|
= Domeykodactylus ceciliae n. gen., n. sp.
Martill et al. 2000
|
Martill et al. 2000 | pterosaur |
||||||||
| see common names | ||||||||||
Geography
| Country: | Chile | State/province: | Antofagasta |
| Coordinates: | 25.3° South, 69.2° West (view map) | ||
| Paleocoordinates: | 25.5° South, 35.9° West | ||
| Basis of coordinate: | stated in text | ||
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous | Epoch: | Early/Lower Cretaceous |
| Key time interval: | Early/Lower Cretaceous | ||
| Age range of interval: | 145.5 - 99.6 m.y. ago |
Stratigraphy
| Formation: | Santa Ana | ||||
| Stratigraphy comments: "The age of the outcrop yielding the specimen cannot be determined with precision, due to a lack of diagnostic fossils, but there are arguments suggesting a Late Jurassic to Early Cretaceous age. Marls with concretions at the base of the sequence here are correlated with similar lithologies of Oxfordian age in nearby exposures. An overlying horizon yields abundant fishes, and a sandstone yields remains of the plant Brachyphyllum. Specimens of Williamsonia have been obtained from above the arkoses. Nearby, outcrops of red sandstones overlie marine sediments that yield the bivalves Megatrigonia and Pterotrigonia, which are of Lower Cretaceous age. Thus an Early Cretaceous age is considered more likely than a Late Jurassic one." |
Lithology and environment
| Primary lithology: | lithified carbonaceous sandstone |
| Includes fossils? | Y |
| Lithology description: "indurated, purple-coloured, poorly sorted, immature polymictic arkose with a carbonate cement" | |
| Environment: | coastal indet. |
| Geology comments: "Coastal environment, probably associated with estuaries" | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | medium |
| Disassociated major elements: | all |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Collectors: | G. C. Diaz |
Metadata
| Also known as: | Domeykodactylus holotype site | ||
| Database number: | 92228 | ||
| Authorizer: | R. Butler | Enterer: | R. Butler |
| Modifier: | R. Butler | Research group: | vertebrate |
| Created: | 2009-11-03 08:53:26 | Last modified: | 2009-11-03 11:00:05 |
| Access level: | the public | Released: | 2009-11-03 08:53:26 |
Reference information
Primary reference:
| |||
Secondary references:
|