The Cobble Hill showing is located on Lot 11, 800 metres west- southwest of Cobble Hill Station on the E & N Railway, 35 kilometres northwest of Victoria.

Limestone, at least 30 metres thick, of the Upper Pennsylvanian to Lower Permian Mount Mark Formation, Buttle Lake Group (previously Buttle Lake Formation, Sicker Group) is exposed over a small area. The limestone, and associated chert, argillite and tuff, dip gently north. The limestone is similar to that of Bonner's Quarry (092B 018), about 400 metres to the east, containing numerous crinoid and shell fragments.