manicouagan

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  -
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1. ***

2. Photograph

3. Landsat Thematic Mapper 28m resolution

4. Landsat image - courtesy Jeff Plescia, John Hopkins University

5. Aerial photograph - courtesy of Christian Koeberl

6. DEM image Provided by Dr. Carlos Roberto de Souza Filho

7 & 8. 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.
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.
Fudali, R. F., The major element chemistry of Libyan desert glass and the mineralogy of its precursor. Meteoritics, v. 16, pp. 247-259. 1981.
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.
Grieve, R. A. F., Wood, C.A., Garvin, J.B., McLaughlin, G. and McHone,J.F.Jr., Astronaut's guide to terrestrial impact craters. Space Shuttle Earth Observation Project, LPI Technical Report Number 88-03, NASA,pp. 1-89. 1988.
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)