12015 (44) - Olivine vitrophyre
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Fact sheet
Description: 

12015 is an olivine vitrophyre with skeletal and dendritic olivine and pyroxene phenocrysts. Microphenocrysts of chromite are also an early phase. These phenocrysts are set in a nearly opaque fine-grained matrix of dendritic pyroxene, plagioclase, filamental ilmenite, chromite, cristobalite, troilite, metallic iron and glass. The bulk composition of 12015 (and 12009) is thought to represent the original magma composition of Apollo 12 mare basalts.

The sample weighed 191.2 grams before analysis. It has not been dated.

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

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