The Della Lake showing consists of various small masses of light grey to white recrystallized limestone of the Upper Pennsylvanian to Lower Permian Azure Lake Formation, Buttle Lake Group. They form a discontinuous band extending westward for 1600 metres from the south end of Della Lake, at the south end of the Buttle Lake uplift. Bed- ding strikes between 085 and 100 degrees and dips 20 to 70 degrees south. The limestone is underlain by volcanic breccia, tuff and argillite of the Paleozoic Sicker Group and overlain by pillowed basalts of the Upper Triassic Karmutsen Formation (Vancouver Group). Refer to the H-W deposit (092F 330) for a discussion of the revised nomenclature of the Buttle Lake uplift stratigraphy.