60516 (2) Cataclastic Anorthosite
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Fact sheet
Description: 

60515 to 60519 are small rake samples from the Lunar Module site at Apollo 16. They all look alike, but could be different samples, because the surfaces are mostly coated with micrometeorite craters. All are cataclastic anorthosite – of the ferroan variety. They contain 98% plagioclase feldspar and minor pyroxene. The cataclastic nature of the sample shows intense fragmentation and deformation of individual crystals to the extent that twin planes have been  bent (rotation 1).

Our thin section image shows a sequence of numbers (1-4) that have been scribed on the glass behind the four rock fragments. Fragment 4 is slightly thick so between crossed polars some plagioclase crystals are yellow instead of shades of grey.

The sample weighed 7.9 grams before analysis and has not been dated.

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

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