70156 (4) High-Ti Mare Basalt
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Fact sheet
Description: 

70156 is a medium grey, subangular, and homogeneous basalt that was collected from a basaltic boulder named the "Geophone Rock". It is a poikilitic high-Ti mare basalt containing interstitial, anhedral ilmenite set in pyroxene and plagioclase feldspar. Ilmenite contains both rutile and spinel exsolution lamellae. Ilmenite-free armalcolite inclusions are found in pyroxene. Olivine is found only as small cores to pyroxene grains (rotation 1). Metallic iron and troilite form interstitial phases. Point counting reveals that 70156 is comprised of 65.2% pyroxene; 19.7% ilmenite; 7.7% plagioclase; 2.9% armalcolite; 2.3% olivine; and 2.2% metallic iron.

The sample weighed 0.63 grams before analysis and has not been dated.

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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igneous
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