Origin of the Apollo 17 deep drill coarse-grained layer

Details Origin of the Apollo 17 deep drill coarse-grained layer Origin of the Apollo 17 deep drill coarse-grained layer

Apr 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976lpsc....7..123c&link_type=abstract

In: Lunar Science Conference, 7th, Houston, Tex., March 15-19, 1976, Proceedings. Volume 1. (A77-34651 15-91) New York, Pergamon

Physics

5

Apollo 17 Flight, Core Sampling, Lunar Evolution, Lunar Surface, Stratigraphy, Aluminum 26, Drilling, Grain Boundaries, Lunar Core, Particle Tracks, Radioactive Age Determination, Sodium 22, Thermoluminescence

Scientific paper

A depositional model of the coarse-grained layer of the Apollo 17 deep drill is described which takes into account thermoluminescence, tracks, Na-22 and Al-26 studies. On the basis of this evidence, it appears that the coarse-grained layer was emplaced some 100 m.y. ago associated either with Camelot Crater or the Central Cluster craters; at that time it was capped by some 25 cm of material which were recently (about 2 m.y.) excavated. The resulting depression has partially and gradually filled since.

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