GREYWACKES is validvalid

GREYWACKE, a type of sandstone

129,439 of 196,601 in NWL2023·also valid in CSW24

GREYWACKE, any coarse-grained, usually dark sandstone containing angular mineral and rock fragments in a fine-grained clayey matrix, also GRAYWACKE

103,096 of 280,887 in CSW24·also valid in NWL2023

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