manicouagan

Strangways

 Crater Name  Location  Latitude  Longitude  Diameter (km)  Age (Ma)  Exposed  Drilled  Target Rock**  Bolide Type***
 Strangways  Northern Territory  S 15° 12'  E 133° 35'  25  646 ± 42  Y  N  M  Achondrite
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1. Aster Image: Courtesy Peter Haines

2. Aeromagnetic image showing prominent half ring feature relating to uplift and truncation of a Mesoproterozoic dolerite sill within the central uplift: Submitted by Peter Haines

3. ERS 2 radar combined with DEM (violet: low topography to yellow: high topography). The crater can be traced by the circular arrangement of Proterozoic sandstones. The yellow elevated plateaus in the center consist of post-impact Cretaceous sandstones. Coverage ca. 40 x 40 km. Submitted by Heiko Zumsprekel

4. DEM Image Provided by Dr. Carlos Roberto de Souza Filho

5 & 6. Image Provided by Dr. Carlos Roberto de Souza Filho

References
Basilevsky, A. T., Fel'dman, V.I., Kapustkina, I.G. and Kolesov,G.M., On the distribution of iridium in the rocks of terrestrial impact craters (in Russian). Geokhimiya, v. 6, pp. 781-790. 1984.
Bottomley, R. J., York, D. and Grieve,R.A.F., 40Argon-39Argon dating of impact craters. Proceedings Lunar and Planetary Science Conference 20th, pp. 421-431. 1990.
Brett, R., Guppy, D.J. and Milton,D.J., Two circular structures of impact origin in Northern Territory, Australia (abstract). Meteoritics, v. 5, p. 184. 1970.
Dence, M. R., Impact melts. Journal of Geophysical Research, v. 76, pp. 5552-5565. 1971.
Evensen N.M. et Al, Comparison of Individual Chondrules in Parnallee (LL-3) and Richardton (H-5), 1973.
Ferguson, J., Brett, R., Milton, D.J., Dence, M.R., Simonds, C.H. and Taylor,S.R., Strangways cryptoexplosion structure, Northern Territory, Australia: preliminary results (abstract). Meteoritics, v. 13, pp. 459-460. 1978.
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.
Guppy, D. J., Brett, R. and Milton,D.J., Liverpool and Strangways craters, Northern Territory: Two structures of probable impact origin. Journal of Geophysical Research, v. 76, pp. 5387-5393. 1971.
Gurov, E. P., Gurova, E. P., Impact structures on the Earth's surface (in Russian). Geologicheskii Zhurnal, v. 47, pp. 117-124. 1987.
Haines, P. W., Impact Cratering and Distal Ejecta: The Australian Record. Australian Journal of Earth Sciences 52, P. 481 - 507. 2005.
Morgan, J. W., Wandless, G. A., Strangways crater, Northern Territory, Australia: Siderophile element enrichment and lithophile element fractionation. Journal of Geophysical Research, Supplement, v. 88, pp. A819-A829. 1983.
Morgan, J. W., Wandless, G.A. and Petrie,R.K., Strangways crater: Trace elements in melt rocks (abstract). Lunar and Planetary Science XII, pp. 714-716. 1981.
Roddy, D. J., Shoemaker, E.M., Shoemaker, C.S. and Roddy,J.K., Aerial photography and geologic studies of impact structures in Australia (abstract). Lunar and Planetary Science XIX, pp. 990-991. 1988.
Shoemaker, E. M., Shoemaker, C. S., The Proterozoic impact record of Australia. AGSO Journal of Australian Geology & Geophysics, v. 16, pp. 379-398. 1996.
Shoemaker, E. M., Shoemaker, C. S., Proterozoic impact record of Australia (abstract). Abstracts of the International Workshop on Meteorite Impact on the Early Earth, Perth, Australia, pp. 47-48. 1990.
Shoemaker, E. M., Shoemaker, C. S., Impact structures of Australia (1987) (abstract). Lunar and Planetary Science XIX, pp. 1079-1080. 1988.
Spray, J. G., Kelley, S. P., Dense., Geology and (super 40) Ar/ (super 39) Ar Laser Fusion dating of the Strangways Impact Structure, Northern Territory, Australia, LPSC XXX, Lunar and Planetary Institute, Houston, TX, Abstr. 1821 (CD-ROM). 1999.
Zumsprekel, H., Bischoff, L., Remote sensing and GIS analyses of the strangways impact structure, Northern Territory, Australian Journal of Earth Sciences, v. 52, pp. 621-630, 2005
* 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)