Geology of Five Small Australian Impact Craters
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Shoemaker, Carolyn S.
Shoemaker, Eugene M.Note: Order does not necessarily reflect citation order of authors.
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CitationShoemaker, Eugene M., Francis A. Macdonald, and Carolyn S. Shoemaker. 2005. Geology of five small Australian impact craters. Australian Journal of Earth Sciences 52:529–544.
AbstractHere we present detailed geological maps and cross-sections of Liverpool, Wolfe Creek, Boxhole, Veevers and Dalgaranga craters. Liverpool crater and Wolfe Creek Meteorite Crater are classic bowlshaped, Barringer-type craters. Liverpool was likely formed during the Neoproterozoic and was ﬁlled and covered with sediments soon thereafter. In the Cenozoic, this cover was exhumed exposing the crater’s brecciated wall rocks. Wolfe Creek Meteorite Crater displays many striking features, including well-bedded ejecta units, crater-ﬂoor faults and sinkholes, a ringed aeromagnetic anomaly, rim-skirting dunes, and numerous iron-rich shale balls. Boxhole Meteorite Crater, Veevers Meteorite Crater and Dalgaranga crater are smaller, Odessa-type craters without fully developed, steep, overturned rims. Boxhole and Dalgaranga craters are developed in highly foliated Precambrian basement rocks with a veneer of Holocene colluvium. The pre-existing structure at these two sites complicates structural analyses of the craters, and may have inﬂuenced target deformation during impact. Veevers Meteorite Crater is formed in Cenozoic laterites, and is one of the best-preserved impact craters on Earth. The craters discussed herein were formed in different target materials, ranging from crystalline rocks to loosely consolidated sediments, containing evidence that the impactors struck at an array of angles and velocities. This facilitates a comparative study of the inﬂuence of these factors on the structural and topographic form of small impact craters.
Citable link to this pagehttp://nrs.harvard.edu/urn-3:HUL.InstRepos:32116876
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