G2R1A1Y4W4A1C3K5E1S1
23 points
GRAYWACKES is validvalid
GRAYWACKE, [n]
GRAYWACKE, any coarse-grained, usually dark sandstone containing angular mineral and rock fragments in a fine-grained clayey matrix, also GREYWACKE [n]
GRAYWACKE, [n]
GRAYWACKE, any coarse-grained, usually dark sandstone containing angular mineral and rock fragments in a fine-grained clayey matrix, also GREYWACKE [n]