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Earth Impact Database Sorted by : | Name | Diameter | Age |

 

Oasis

Crater Name
Location
Latitude
Longitude
Diameter (km)
Age (Ma)*
Exposed
Drilled
Target Rock**
Bolide Type***
Oasis
Libya
N 24° 35'
E 24° 24'
18
< 120
Y
N
S
-

 

***

Photograph

Landsat Thematic Mapper 28m resolution

Landsat image - courtesy Jeff Plescia, John Hopkins University

Aerial photograph - courtesy of Christian Koeberl

DEM image Provided by Dr. Carlos Roberto de Souza Filho

Image Provided by Dr. Carlos Roberto de Souza Filho

Image Provided by Dr. Carlos Roberto de Souza Filho

References
Abate, B., Koeberl, C., Underwood, J.R., Fisk, E.P. and Giegegack,R.F., BP and Oasis impact structures, Libya, and their relation to Libyan desert glass: Petrography, geochemistry, and geochronology (abstract). Large Meteorite Impacts and Planetary Evolution,. 1997.
Abate, B., Koeberl, C., Underwood, J.R., Reimold, W.U., Buchanan, P., Fisk, E.P. and Giegengack,R.F., BP and Oasis impact structures, Libya: Preliminary petrographic and geochemical studies, and relation to Libyan desert glass (abstract). Lunar and Planetary Science XXVIII, pp. 1-2. 1997.
Barnes, V. E., Underwood, J. R. Jr., New investigations of the strewn field of Libyan desert glass and its petrography. Earth and Planetary Science Letters, v. 30, pp. 117-122. 1976.
Clayton, P. A., Spencer, J. L., Silica-glass from the Libyan desert. Mineralogical Magazine, v. 23, pp. 501-508. 1934.
Cohen, A. J., The terrestrial origin of Libyan desert silica glass. Physics and Chemistry of Glasses, v. 2, pp. 83-86. 1961.
French, B. M., Underwood, J.R. Jr. and Fisk,E.P., Shock metamorphic features in two meteorite impact structures, southeastern Libya. Geological Society of America Bulletin, v. 85, pp. 1425-1428. 1974.
French, B. M., Underwood, J.R. Jr. and Fisk,E.P., Shock-metamorphic effects in two new Libyan impact structures (abstract). Geological Society of America, v. 4, pp. 510-511. 1972.
Fudali, R. F., The major element chemistry of Libyan desert glass and the mineralogy of its precursor. Meteoritics, v. 16, pp. 247-259. 1981.
Gibson, R.L., Reimold, W.U., Baegi, M., Crosta, A.P., Shbeli, E., et al, The Oasis Structure, southeastern Libya; new constraints on size, age and mechanism of formation (abstract). 42nd Lunar and Planetary Science Conference, paper no. 2014. 2011.
Grieve, R. A. F., The record of impact on Earth: Implications for a major Cretaceous/Tertiary impact event. Geological Society of America, Special Paper 190, pp. 25-37. 1982.
Gurov, E. P., Gurova, E. P., Impact structures on the Earth's surface (in Russian). Geologicheskii Zhurnal, v. 47, pp. 117-124. 1987.
Hörz, F., Ejecta of the Ries crater, Germany. The Geological Society of America Special Paper 190, pp. 39-55. 1982.
Kleinmann, B., The breakdown of zircon observed in the Libyan desert glass as evidence of its impact origin. Earth and Planetary Science Letters, v. 5, pp. 497-501. 1969.
Koeberl, C., African meteorite impact craters: Characteristics and geological importance. Journal of African Sciences, v. 18, pp. 263-295. 1994.
Koeberl, C., Reimold, W. U., Field Studies at the BP and Oasis impact structures, Libya. Abstracts of the 65th Annual meeting of the Meteoritical Society, p.A79. 2002.
Koeberl, C., Reimold, W.U. and Plescia, J., BP and Oasis impact structures, Libya; remote sensing and field studies, European Science Foundation workshop on Impact tectonics, pp.161-190. 2005. 
Martin, A. J., Possible impact structure in southern Cyrenaica, Libya. Nature, v. 223, pp. 940-941. 1969.
Masaitis, V. L., Danilin, A.N., Maschak, M.S., Raykhlin, A.I., Selivanovskaya, T.V. and Shadenkov,Ye.M., The Geology of Astroblemes (in Russian). Leningrad, Nedra, 231 p. 1980.
McHone J F., Dietz, R. S., Earth's multiple impact craters and astroblemes (abstract). Lunar and Planetary Science, v. XXIII, pp. 887-888. 1992.
McHone, J. F., Blumberg, D.G., Greeley, R. and Underwood, J.R.,Jr., Space shuttle radar images of terrestrial impact structures: SIR-C/X-SAR (abstract). Meteoritics, v. 30, pp. 543. 1995.
McHone, J.F., Greeley, R., Williams, K.K., Blumberg, D.G. and Kuzmin, R.O., Space shuttle observations of terrestrial impact structures using SIR-C and X-SAR radars, Meteoritics & Planetary Science, v.37, no.3, pp.407-420. 2002.
Murali, A. V., Zolensky, M.E., Underwood, J.R. and Giegengack,R.F., Formation of Libyan desert glass (abstract). Lunar and Planetary Science XIX, pp. 817-818. 1988.

 

* pre-1977 K-Ar, Ar-Ar and Rb-Sr ages recalculated using the decay constants of Steiger and Jager (1977) Ages in millions of years (Ma) before present.

** Abbreviations: C - Crystalline Target; C-Ms - Metasedimentary Target; M - Mixed Target (i.e.sedimentary strata overlying crystalline basement); S - sedimentary target (i.e. no crystalline rocks affected by the impact event). From Osinski. G. R., Spray J. G., and Grieve R. A. F. 2007. Impact melting in sedimentary target rocks: A synthesis. In The Sedimentary Record of Meteorite Impacts, Geological Society of America Special Paper. Editors: Evans K. Horton W., King D., Morrow J., and Warme J. Geological Society of America: Boulder, in press.

***
From Koeberl,C. Identification of meteoritic components in impactites. 1998, Koeberl, C. The Geochemistry and Cosmochemistry of Impacts. 2007 and PASSC Files. (IAB, IIIAB, IIIB, IIID - Iron Meteorite)

 

 

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