60639 (2) Anorthosite-rich Breccia
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Fact sheet
Description: 

60639 is a breccia best known for the fragment of mare basalt it contains. However, our thin section samples another clast - a cataclastic anorthosite consisting of intensely shocked plagioclase feldspar. It is almost entirely plagioclase (An96) with minor pyroxene (small crystal in rotation 2). The anorthosite is ferroan.

The sample weighed 175.1 grams before analysis and has not been dated.

Further details of this and other Apollo samples are here: http://curator.jsc.nasa.gov/lunar/

The thin section is thick so between crossed polars some plagioclase crystals are yellow or blue instead of shades of grey.

In Place
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Timescale:
Not known
Ma = Millions of years ago
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metamorphic
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