A pervasive talc-magnesite trend is developed in a sequence of of silver grey phyllites with interbeds of carbonaceous slate and minor limestone of the Cambrian to Mississippian Lardeau Group, near the contact with limestone of the Lower Cambrian Badshot Formation to the east. These rocks have been metamorphosed up to greenschist facies. An average foliation strikes 090 degrees and dips 36 degrees north.

The deposit outcrops on the shore of the Columbia River and continues southeast to Highway 6, crossing the Goldstream River 500 metres east of the Columbia River for a total length of 1600 metres. Talc float to the southeast, suggests that the trend continues for another 1600 metres. The unit generally strikes 135 degrees and dips 70 degrees north.

The deposit consists of talc-magnesite schist with variable amounts of chlorite and serpentine occurring as a single 2 to 7 metre wide "vein" on Goldstream River and as 3 separate talc "veins" interlayered with marble and graphitic to talcose schist along the highway to the southeast. The talc zones display a composite width of 39 metres on the highway. The talc is greenish white and steatitic to occasionally crystalline. This talc mineralization appears to be currently subeconomic in terms of tonnage and grade (Assessment Report 18028). Minor chalcopyrite and pyrite occur just north and south of this unit on both sides of the Goldstream River.