Oasis crater
Template:Short description Template:Infobox terrestrial impact site
Oasis is a meteorite crater in Libya. The crater is exposed at the surface, and has been significantly eroded. The prominent topographic ring is only the central uplift, which is about Template:Convert in diameter, while the original crater rim is estimated to have been Template:Convert in diameter. The age is estimated to be less than 120 million years (Lower Cretaceous).<ref>Template:Cite Earth Impact DB</ref>
The Oasis crater was photographed from space during the Apollo-Soyuz Test Project, and was recognized as a "possible astrobleme" at the time.<ref>Apollo-Soyuz Test Project Preliminary Science Report. NASA TM X- 58173. Feb. 1976.</ref> The crater had been recognized prior to this in 1969 by A. J. Martin.<ref>Martin, A. Possible Impact Structure in Southern Cyrenaica, Libya. Nature 223, 940–941 (1969). https://doi.org/10.1038/223940a0</ref> French et al. state that Oasis crater and the smaller BP Structure, about Template:Cvt to the north, were probably simultaneous impacts.<ref>BEVAN M. FRENCH, JAMES R. UNDERWOOD, EDWARD P. FISK; Shock-Metamorphic Features in Two Meteorite Impact Structures, Southeastern Libya. GSA Bulletin 1974;; 85 (9): 1425–1428. doi: https://doi.org/10.1130/0016-7606(1974)85<1425:SFITMI>2.0.CO;2</ref> Both impacts deform the Nubian Sandstone of early Cretaceous age.
About Template:Cvt to the southeast in Egypt is the much younger Kamil Crater.
- Oasis crater AST-16-1244.jpg
Part of AST image AST-16-1244 showing the crater at center (1975)
- Oasis crater x5.jpg
Oblique Landsat image of Oasis crater draped over digital elevation model (x5 vertical exaggeration); screen capture from NASA World Wind
ReferencesEdit
External linksEdit
- Anonymous (nd) Africa (Impact Craters), Earth Impact Database, Planetary and Space Science Centre Template:Webarchive, University of New Brunswick, New Brunswick, Canada.
- Template:Cite journal