The Otter Creek showing occurs in the valley of Otter Creek, about 11 kilometres north-northwest of the town of Tulameen.

A deposit of clay of Recent age covers the floor of the valley over a distance of 5 kilometres. The material consists of noncalcareous flood-plain silt of fair plasticity, with an air shrinkage of 5.6 per cent. Firing characteristics are as follows (Geological Survey of Canada Memoir 24, page 123):

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Cone Fire shrinkage Absorption Colour

(per cent) (per cent)

010 nil 17.24 Red

03 5.8 4.5 Dark red

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The clay fused at cone 1. Testing indicates it would be suitable for the manufacture of ordinary red bricks.