15086 (39) Regolith Breccia
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Fact sheet
Description: 

15086 is a typical soil breccia - a fragmental-matrix breccia characterized by diverse population of mineral, glass and lithic clasts set is a matrix of light to dark brown glass fragments and comminuted mineral and lithic debris. The grain size distribution is seriate up to 3mm. Pore space is common and occurs as irregularly shaped vugs 0.4 to 2.5mm across. There is an abundance of green glass spheres, typical of the regolith in the region. Other glass is also common. Lithic clasts are mostly basaltic rocks with a variety of textures. Feldspathic basalts with KREEP composition are common.

The sample weighed 216.5 grams before analysis. The green glass has been dated at 3.29 billion years (Ar/Ar).

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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