G2R1O1U1N1D2M3A1S1S1
14 points
GROUNDMASS is validvalid
the fine-grained part of an igneous rock, in which the larger crystals are embedded
the fine-grained part of an igneous rock, in which the larger crystals are embedded
the fine-grained part of an igneous rock, in which the larger crystals are embedded
the fine-grained part of an igneous rock, in which the larger crystals are embedded