Puchezh-Katunki is a meteor crater located in the Nizhny Novgorod Oblast of the Volga Federal District, Russia. It is 80 km (50 mi) in diameter. Argon–argon dating has constrained the age of formation to be 195.9 ± 1.0 million years old, placing it within the Sinemurian stage of the Early Jurassic.[1][2] The crater is not exposed to the surface, but appears as variation in the vegetation. The Earth Impact Database lists a rim-to-rim diameter of 40 kilometres (25 mi). [3]
| Puchezh-Katunki crater | |
|---|---|
 Landsat image of Puchezh-Katunki crater | |
| Impact crater/structure | |
| Confidence | Confirmed |
| Diameter | 40 km (25 mi) (rim-to-rim) 80 km (50 mi) (including ring terrace) |
| Age | 195.9 ± 1.0 Ma Sinemurian, Early Jurassic |
| Exposed | No |
| Drilled | Yes |
| Location | |
| Coordinates | 56°58′N 43°43′E / 56.967°N 43.717°E |
| Country | Russia |
| Province | Nizhny Novgorod Oblast |
  Location of the crater in Russia .svg) Puchezh-Katunki crater (Nizhny Novgorod Oblast) | |
Description edit
The central dome, ring depression, and ring terrace of the 80 km (50 mi) wide impact structure are nearly completely buried under Neogene and Quaternary sediments, with the only exposed impactites found on the banks of the Volga River. [4]
See also edit
References edit
- ^ Holm-Alwmark, S.; Alwmark, C.; Ferrière, L.; Lindström, S.; Meier, M. M. M.; Scherstén, A.; Herrmann, M.; Masaitis, V. L.; Mashchak, M. S.; Naumov, M. V.; Jourdan, F. (August 2019). "An Early Jurassic age for the Puchezh-Katunki impact structure (Russia) based on 40 Ar/ 39 Ar data and palynology". Meteoritics & Planetary Science. 54 (8): 1764–1780. doi:10.1111/maps.13309. ISSN 1086-9379. S2CID 189999865.
- ^ Holm-Alwmark, Sanna; Jourdan, Fred; Ferrière, Ludovic; Alwmark, Carl; Koeberl, Christian (15 May 2021). "Resolving the age of the Puchezh-Katunki impact structure (Russia) against alteration and inherited 40Ar* – No link with extinctions". Geochimica et Cosmochimica Acta. 301: 116–140. doi:10.1016/j.gca.2021.03.001. S2CID 233620694.
- ^ "Puchezh-Katunki". Earth Impact Database. Planetary and Space Science Centre University of New Brunswick Fredericton.
- ^ Pálfy, József (2004). "Did the Puchezh-Katunki Impact Trigger an Extinction?". Hungarian Natural History Museum.
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