76295 (85) Impact Melt Breccia
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Fact sheet
Description: 

76295 is a non-vesicular, crystalline matrix breccia with a blue­ grey colour (similar to 76275). Light and dark clasts have a distinct outline with the matrix. It is a fine sub-ophitic impact melt. The blue-grey breccia matrix contains bands and swirls of minor (~10%) tan matrix breccia and partially dissolved mineral and rock clasts. The mode is about 50% plagioclase and 40% pyroxene with minor ilmenite, olivine and other accessory minerals (zircon, metallic iron, troilite). Rotation 1 shows a large basaltic clast containing sieve-textured plagioclase feldspar. Rotation 2 shows a chondrule-like clast of microbreccia.

The sample weighed 260.7 grams before analysis and has been dated at 3.94±0.04 billion years.

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

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Not known
Ma = Millions of years ago
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metamorphic
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