The location of the Logan Gulch coal occurrence is described as claims situated on the east side of the Shuswap River about 8 kilometres northeast of Enderby (Minister of Mines Annual Report 1905, page J193). Current geology maps indicates the area is close to the contact between a predominantly volcanic succession of andesite, basalt, dacite, trachyte flows, breccias and tuffs, and a sedimentary succession comprised of conglomerate, sandstone, shale, coal and tuff. All rock units are part of the Eocene Kamloops Group.

Cairnes (1932) describes the Tertiary coal occurrences in the area as seams varying from a few centimetres to over 30 centimetres in thickness, composed of alternating thin layers of coal and sandstone or shale. In other instances, the coal seams are merely strata containing abundant, partly to completely carbonized fossil remains of plants.

Minister of Mines Annual Report 1904 (page G233) describes the discovery of a seam of coal near the summit of a mountain, about 8 kilometres north of Enderby. The coal is said to be of excellent quality and is stated to be 1.2 metres thick, but may prove to be of greater extent, as it is partly covered by slides from the mountain.