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Descriere The Shoemaker impact structure lies in the arid, central part of Western Australia near Wiluna. The crater is about 30 kilometers (18 miles) in diameter and contains seasonal lakes that produce salt deposits as they evaporate. It is approximately 1.7 billion years old and is regarded as the oldest known Australian impact structure to date. A dark, crescent-shaped inner ring surrounds the core, which consists of uplifted granitic rocks. The outer ring is composed of Precambrian sedimentary rocks. The crater, formerly known as Teague, was renamed the Shoemaker impact structure in honor of the late geologist Eugene M. Shoemaker, one of the founding fathers of impact research.
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Sursă http://landsat.usgs.gov/gallery/detail/366/
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U.S. Department of the Interior | U.S. Geological Survey
Alte versiuni http://en.wikipedia.org/wiki/Image:Shoemaker_crater.jpg

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This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code. Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.

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5 mai 2000

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actuală7 martie 2007 16:53Miniatură pentru versiunea din 7 martie 2007 16:531.200x1.318 (344 KB)Zumthie{{Information |Description=The Shoemaker impact structure lies in the arid, central part of Western Australia near Wiluna. The crater is about 30 kilometers (18 miles) in diameter and contains seasonal lakes that produce salt deposits as they evaporate. I

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