Seams in the anorthosite series are only intermittently exposed.
斜长岩组中的矿层仅断续出露。
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HOUSTON - in the lab, the Moon rocks look nondescript - dark gray basalt, a whitish mineral called anorthosite and mixtures of the two with crystals thrown in.
The anorthosite underwent at least two more times of deformation than the norite, suggesting that the norite was emplaced after the consolidation and cooling of the anorthosite.