"Crease Limestone And Whitehead Limestone (Undifferentiated)"@en . "346.7"^^ . . . . "343.0"^^ . . . . "stable"@en . "See the Lithology descriptions for the component formations."@en . "CRWT"@en . "Limestone. Bedrock. Occurs onshore. Formed during the Chadian Substage - to - Arundian Substage (Carboniferous Period) (346.7-343 Ma BP)."@en . "Crease Limestone And Whitehead Limestone (Undifferentiated)"@en .