Letrero Formation
Letrero Formation | |
---|---|
Stratigraphic range: Late Miocene (Mayoan-Montehermosan) ~11.6–5.3 Ma PreꞒ Ꞓ O S D C P T J K Pg N | |
Type | Geological formation |
Lithology | |
Primary | Siltstone |
Other | Sandstone |
Location | |
Coordinates | Letrero Formation (Ecuador) |
The Letrero Formation is a Late Miocene (Mayoan to Montehermosan in the SALMA classification) geologic formation in south-central Ecuador. The formation comprises lacustrine sediments with strong fluvial clastic input and contains siltstones and fine-grained sandstones.[1]
Fossil content
The formation has provided fossils of:
- Anadasypus aequatorianus[2]
- Caviomorpha indet.
- Litopterna indet.
- Toxodontia indet.
See also
References
- ^ RHM Locality 4 at Fossilworks.org
- ^ Carlini et al., 2014
Bibliography
- Carlini, Alfredo A.; Castro, Mariela C.; Madden, Richard H.; Scillato Yané, Gustavo J. (2013), "A new species of Dasypodidae (Xenarthra: Cingulata) from the late Miocene of northwestern South America: implications in the Dasypodini phylogeny and diversity", Historical Biology: An International Journal of Paleobiology, 26 (6): 728–736, retrieved 2019-02-09