The Mt Dick occurrence is comprised of a bed of fine to medium-grained, grey limestone of the Permian to Pennsylvanian Mount Mark Formation (Buttle Lake Group) up to 6 metres thick, extending north from the southwest coast of Texada Island for 820 metres. The bed outcrops along the base of cliffs comprised of massive and pillowed basaltic flows of the overlying Upper Triassic Vancouver Group, Karmutsen Formation. Aphanitic volcanics of the Paleozoic Sicker Group underlie the limestone. The bed strikes 058 degrees and dips 60 degrees northwest. This limestone is likely the southwestern extension of the bed that comprises the Anderson Bay occurrence (092F 088), which outcrops 1.1 kilometres to the northeast. Crinoids, corals and bryozoa are commonly found in this limestone. A bed of purple-pink variegated marble up to 6 metres wide, also occurs in the limestone.