Carrizal: Tortonian, Venezuela

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Malacostraca - Decapoda - Inachoididae
Malacostraca - Decapoda - Parthenopidae
Platylambrus sp. Stimpson 1871
Malacostraca - Decapoda - Aethridae
Hepatella amazonica Beurlen 1958
see common names

Geography
Country:Venezuela State/province:Falcon
Coordinates: 11.5° North, 69.5° West (view map)
Paleocoordinates:12.0° North, 66.7° West (Wright 2013)
Basis of coordinate:based on nearby landmark
Time
Period: Neogene Epoch: Miocene
Stage: Tortonian 10 m.y. bin: Cenozoic 6
Key time interval: Tortonian
Age range of interval: 11.63 - 7.246 m.y. ago
Stratigraphy
Formation:Caujarao
Stratigraphy comments: Overlying Formation: La Vela Formation. Underlying Formation: Socorro Formation. Thickness: 690 m for the El Muaco Member (where the fossil was located), but otherwise the formation is up to 1220 m. (Smith et al., 2010; Carrillo-Briceno et al., 2019).
Lithology and environment
Primary lithology: mudstone
Lithology description: The lithology for the El Muaco Member consists mainly of mudstones and clays with some limestones and sandstones well-developed at the basal section of the member (Carrillo-Briceno et al., 2019).
Environment:fluvial-deltaic indet.
Geology comments: The El Muaco Member is thought to have been a shallow marine platform (Wozniak and Wozniak 1987). However, the mixture of marine and freshwater/terrestrial fauna observed, which includes amber fragments and carbonized vegetation, could be inferred as the result of the input of streams and rivers from the backshore to the littoral marine environment. This is evidence of mixed coastal marine and fluvial–estuarine environments. (Carrillo-Briceno et al., 2019).
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:general faunal/floral analysis
Metadata
Database number:228728
Authorizer:J. Wolfe Enterer:A. Lynch
Created:2022-12-29 19:08:51 Last modified:2025-02-22 15:12:02
Access level:the public Released:2022-12-29 19:08:51
Creative Commons license:CC0
Reference information

Primary reference:
83501. O. Aguilera, D. Rodrigues de Aguilera, F. J. Vega and M. R. Sanchez-Villagra. 2010. Mesozoic and Cenozoic decapod crustaceans from Venezuela and related trace-fossil assemblages. In M. R. Sanchez-Villagra, O. A. Aguilera, A. A. Carlini (eds.), Urumaco and Venezuelan Paleontology: The Fossil Record of the Northern Neotropics 103-129 [J. Wolfe/A. Lynch]