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Apollo 16 Exploration of Descartes: A Geologic Summary

Ulrich, G. E. and Rennilson, J. J. and Silver, L. T. (1973) Apollo 16 Exploration of Descartes: A Geologic Summary. Science, 179 (4068). pp. 62-69. ISSN 0036-8075. doi:10.1126/science.179.4068.62.

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The Cayley Plains at the Apollo 16 landing site consist of crudely stratified breccias to a depth of at least 200 meters, overlain by a regolith 10 to 15 meters thick. Samples, photographs, and observations by the astronauts indicate that most of the rocks are impact breccias derived from an anorthosite-gabbro complex. The least brecciated members of the suite include coarse-grained anorthosite and finer-grained, more mafic rocks, some with igneous and some with metamorphic textures. Much of the traverse area is covered by ejecta from North Ray and South Ray craters, but the abundance of rock fragments increases to the south toward the younger South Ray crater. The Descartes highlands, a distinct morphologic entity, differ from the adjacent Cayley formation more in physiographic expression than in lithologic character.

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Additional Information:© 1973 American Association for the Advancement of Science. Received 6 September 1972; revised 17 October 1972. Work done under NASA contract T-5874A. Publication authorized by the director, U.S. Geological Survey.
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Issue or Number:4068
Record Number:CaltechAUTHORS:20150729-094139122
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Official Citation:Apollo 16 Exploration of Descartes: A Geologic Summary Apollo Field Geology Investigation Team Science 5 January 1973: 179 (4068), 62-69. [DOI:10.1126/science.179.4068.62]
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59052
Deposited By: Tony Diaz
Deposited On:29 Jul 2015 19:14
Last Modified:10 Nov 2021 22:14

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