The Leviathan occurrence is located south of Campbell Creek, approximately 1.3 kilometres east of the north end of Leviathan Lake.

The area is underlain by quartzite and quartz arenite sedimentary rocks of the Lower Cambrian Hamill Group and mudstone, siltstone, shale and fine clastic sedimentary rocks of the Cambrian to Devonian Index Formation (Lardeau Group). These have been intruded by granodioritic rocks of an un-named Cretaceous intrusive to the south.

Locally, a quartz-rich schist, interlayered with calcareous rock, is mineralized adjacent to granite-pegmatite with pyrrhotite, minor pyrite and trace chalcopyrite. Mineralization is also concentrated along fractures in both the schist and pegmatite dike. Later reports, in 1979, describe an impure quartzitic limestone and white re-crystallized limestone hosting a 1.6 metre thick sulphide layer with pyrrhotite, pyrite and possible sphalerite. Limonite and siderite are also reported.

In 1924, a sample assayed 48.34 grams per tonne gold and 99.43 grams per tonne silver (Annual Report 1924).

By 1918, more than 100 metres of underground development had occurred in two tunnels. In 1972, Canex completed a program of soil sampling. In 1979, Esperanza Explorations examined the area as the Step claim.