Arroyo Seco, Cerro Guillermo (upper): Late/Upper Coniacian - Early/Lower Santonian, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
- Testudines
- Chelidae
|
|||||||
Chelidae indet.
Gray 1825
|
|||||||
Reptilia
|
|||||||
Titanosauria indet.
Bonaparte and Coria 1993
|
|||||||
see common names |
Geography
Country: | Argentina | State/province: | Mendoza | County: | Malargüe |
Coordinates: | 37.1° South, 69.4° West (view map) | ||||
Paleocoordinates: | 42.4° South, 49.8° West | ||||
Basis of coordinate: | estimated from map | ||||
Altitude: | 900 meters | ||||
Geographic resolution: | small collection |
Time
Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
10 m.y. bin: | Cretaceous 6 | ||
Key time interval: | Late/Upper Coniacian - Early/Lower Santonian | ||
Age range of interval: | 89.80000 - 83.60000 m.y. ago |
Stratigraphy
Geological group: | Neuquén | Formation: | Plottier | ||
Local section: | Arroyo Seco | Local bed: | 18 m | ||
Local order: | bottom to top | ||||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: formation is now a subgroup containing 2 formations: "upper section of the Río Neuquén Formation" corresponds to the Plottier Formation within the Río Neuquén Subgroup. |
Lithology and environment
Primary lithology: | wave ripples,"cross stratification",volcaniclastic,green sandstone |
Secondary lithology: | gray,red mudstone |
Includes fossils? | Y |
Lithology description: "The fossil-rich level is composed of greenish (10YR 7/2), mica-rich, feldspathic wackes interbedded with mottled red (2.5 YR 4/4) and gray shales." | |
Environment: | crevasse splay |
Geology comments: "overbank deposits associated with sandy fluvial channels developed on a huge muddy flood plain"; specifically a "proximal overbank" facies |
Taphonomy
Modes of preservation: | body |
Degree of concentration: | concentrated |
Size of fossils: | macrofossils |
Preservation of anatomical detail: | good |
Articulated whole bodies: | none |
Associated major elements: | some |
Disassociated major elements: | some |
Disassociated minor elements: | some |
Fragmentation: | occasional |
Encrustation: | none |
Spatial resolution: | parautochthonous |
Collection methods and comments
Collection methods: | selective quarrying,mechanical,field collection |
Reason for describing collection: | taxonomic analysis |
Metadata
Database number: | 73488 | ||
Authorizer: | M. Carrano | Enterer: | M. Carrano |
Modifier: | M. Carrano | Research group: | vertebrate |
Created: | 2007-06-18 14:18:21 | Last modified: | 2017-05-23 16:34:15 |
Access level: | the public | Released: | 2007-06-18 14:18:21 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
24659. | ETE | B. J. González Riga and R. A. Astini. 2007. Preservation of large titanosaur sauropods in overbank fluvial facies: a case study in the Cretaceous of Argentina. Journal of South American Earth Sciences 23:290-303 [M. Carrano/M. Carrano] |