Madygen Formation
Madygen Formation Stratigraphic range: Middle - Upper Triassic, Ladinian–Carnian | |
---|---|
Type | Geological formation |
Thickness | 600 m |
Lithology | |
Primary | Conglomerate, sandstone, mudstone |
Location | |
Region | Turkestan Range, Batken Province |
Country | Kyrgyzstan |
Type section | |
Named for | Madygen village |
Named by | Evgeny A. Kochnev |
The Madygen Formation is a Triassic-age geologic formation in Kyrgyzstan. It consists of terrestrial lacustrine (lake) and fluvial (river) deposits. Many vertebrate fossils have been found from the formation, including those of cartilaginous fishes and unusual Triassic reptiles like Sharovipteryx and Longisquama.[1][2]
Paleobiota
Color key
|
Notes Uncertain or tentative taxa are in small text; |
Cartilaginous fishes
Taxon | Member | Material | Notes | Images |
---|---|---|---|---|
An egg capsule likely belonging to a xenacanthid. |
||||
Teeth and egg capsules. |
A hybodontid shark. |
|||
Teeth and egg capsules. |
A hybodontid shark. |
|||
Amphibians
Taxon | Member | Material | Notes | Images |
---|---|---|---|---|
Triassurus sixtelae |
A possible early caudate (salamander) known from fossil larvae. |
|||
Reptiles
Taxon | Member | Material | Notes | Images |
---|---|---|---|---|
A single specimen preserving the front half of a skeleton and scale impressions. |
A drepanosaur. |
|||
A reptile with an elongated row of scales along its back. |
||||
A gliding prolacertiform. |
| |||
Synapsids
Taxon | Member | Material | Notes | Images |
---|---|---|---|---|
A cynodont. |
||||
References
- 1 2 3 4 Fischer, J.; Voigt, S.; Schneider, J.W.; Buchwitz, M.; Voigt, S. (2011). "A selachian freshwater fauna from the Triassic of Kyrgyzstan and its implication for Mesozoic shark nurseries". Journal of Vertebrate Paleontology. 31 (5): 937–953. doi:10.1080/02724634.2011.601729.
- ↑ Unwin, D.M.; Alifanov, V.R.; Benton, M.J. (2003). "Enigmatic small reptiles from the Middle-Late Triassic of Kyrgyzstan". In Benton, M.J.; Shishkin, M.A.; and Unwin, D.M. The Age of Dinosaurs in Russia and Mongolia. Cambridge: Cambridge University Press. pp. 177–186. ISBN 9780521545822.
- ↑ V. R. Alifanov and E. N. Kurochkin (2011). "Kyrgyzsaurus bukhanchenkoi gen. et sp. nov., a new reptile from the triassic of southwestern Kyrgyzstan". Paleontological Journal. 45 (6): 639–647. doi:10.1134/S0031030111060025.
This article is issued from Wikipedia - version of the 11/2/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.