15065 (85) Pigeonite Basalt
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Fact sheet
Description: 

15065 is coarse-grained lunar mare basalt. It came from the coarsest sample in the region and possibly represents a deeper part of a basalt flow that has been later exposed by a meteorite impact.

The thin section exhibits abundant prismatic/euhedral pyroxene (pigeonite) crystals with greenish cores and red-brown rims intergrown with anhedral to subhedral plagioclase. Ragged anhedral olivine grains are found enclosed in the pyroxene cores. Three large blades of tridymite can be seen in rotation 1. Ilmenite, troilite and metallic iron are the other main accessory minerals.

The sample weighed 1475.5 grams before analysis and has been dated at 3.34±0.09 billion years (Sm/Nd).

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

In Place
In Time
Location description: 
Apollo 15 landing site
Accuracy:
Location precision: 
Good
Timescale:
Not known
Ma = Millions of years ago
In Focus
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Type:
Type: 
igneous
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