Chorrillo Formation
The Chorrillo Formation, also named as Chorillo Formation,[1] is a Maastrichtian geologic formation in southern Patagonia, Argentina. The formation is more than 50 metres (160 ft) thick and underlies the Calafate Formation and rests on top of the La Irene Formation.[2]
| Chorrillo Formation Stratigraphic range: | |
|---|---|
 Satellite image of the Chorrillo Formation site (in the middle on the right). In the bottom left is the Perito Moreno Glacier. | |
| Type | Geological formation |
| Underlies | Calafate Formation |
| Overlies | La Irene Formation |
| Thickness | >50 m (160 ft) |
| Lithology | |
| Primary | Claystone |
| Location | |
| Location | Patagonia |
| Coordinates | 49.9°S 72.5°W |
| Approximate paleocoordinates | 51.8°S 62.2°W |
| Region | Santa Cruz Province |
| Country |  Argentina |
| Extent | Southeast of Viedma Lake North of Argentino Lake Austral Basin |
| Type section | |
| Named by | Arbe & Hechem |
| Year defined | 1984 |
  Chorrillo Formation (Argentina) | |
Fossils
Dinosaur remains are among the fossils that have been recovered from the formation.
Fossils recovered from the formation are:
- Dinosaurs
- Isasicursor
- Nullotitan
- Kookne
- Euiguanodontia indet.
- Hadrosauridae indet.
- Megaraptoridae indet.
- Noasauridae indet.
- Unenlagiidae indet.
- Anurans
- Anura indet.
- Calyptocephalellidae indet
- Fishes
- Teleostei indet.
- Vidalamiinae indet.
- Mammals
- Magallanodon
- Mammalia indet.
- Mosasaurs
- Mosasauridae indet.
- Snakes
- Rionegrophis
- Serpentes indet.
- Turtles
- Chelidae indet.
Other fossils recovered from the formation are:
- Gastropods
- Pomacea sp.
- Pleuroceridae indet.
- Potamolithus sp.
- Physa sp.
- Stenophysa sp.
- Achatinidae indet.
- Holospira sp.
- Bulimulidae indet.
- Plants
- Podocarpoxylon dusenii
- Pollen
- Baculatisporites comaumensis
- Baculatisporites kachaikensis
- Ceratosporites equalis
- Clavifera triplex
- Clavatipollenites sp.
- Concavissimisporites sp.
- Cyatheacidites annulatus
- Cyathidites australis
- Cyathidites minor
- Cyathidites rafaeli
- Foveosporites canalis
- Gleicheniidites senonicus
- Laevigatosporites ovatus
- Leptolepidites sp. cf. L. major
- Microcachryidites antarcticus
- Peninsulapollis gilli
- Phyllocladidites mawsonii
- Podocarpidites sp. cf. P. ellipticus
- Podocarpidites sp. cf. P. herbstii
- Podocarpidites sp.
- Retitriletes austroclavatidites
- Trichotomosulcites subgranulatus
- Tricolpites reticulatus
- Tricolpites sp.
- Trilites fasolae
- Trilites sp. cf. T. tuberculiformis
- Trilites sp. cf. T parvallatus
- Tuberculatosporites parvus
- Vitreisporites signatus
References
- Río Leona at Fossilworks.org
- Marenssi et al., 2003, p.406
Bibliography
- ; , and . 2003. Estratigrafía y sedimentología de las unidades del Cretácico superior-Paleógeno aflorantes en la margen sureste del lago Viedma, provincia de Santa Cruz, Argentina. Revista de la Asociación Geológica Argentina 58. 403–416. Accessed 2018-08-30.
- ; , and . 2004. The Dinosauria, 2nd edition, 1–880. Berkeley: University of California Press. Accessed 2019-02-21.ISBN 0-520-24209-2
- Novas, F.; Agnolin, F.; Rozadilla, S.; Aranciaga-Rolando, A.; Brissón-Eli, F.; Motta, M.; Cerroni, M.; Ezcurra, M.; Martinelli, A.; D'Angelo, J.; Álvarez-Herrera, J.; Gentil, A.; Bogan, S.; Chimento, N.; García-Marsà, J.; Lo Coco, G.; Miquel, S.; Brito, F.; Vera, E.; Loinaze, V.; Fernandez, M.; Salgado, L. (2019). "Paleontological discoveries in the Chorrillo Formation (upper Campanian-lower Maastrichtian, Upper Cretaceous), Santa Cruz Province, Patagonia, Argentina". Revista del Museo Argentino de Ciencias Naturales. 21 (2): 217–293. doi:10.22179/REVMACN.21.655. Retrieved 2021-01-05.
- Chimento, N.; Agnolin, F.; Tsuihiji, T.; Manabe, M.; Novas, F. (2020). "New record of a Mesozoic gondwanatherian mammaliaform from Southern Patagonia". The Science of Nature. 107 (6): 49. doi:10.1007/s00114-020-01705-x. PMID 33211174. Retrieved 2021-01-05.
Further reading
- J. E. Powell. 2003. Revision of South American titanosaurid dinosaurs: palaeobiological, palaeobiogeographical and phylogenetic aspects. Records of the Queen Victoria Museum Launceston 111:1-173
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.