Limonitic (iron-carbonate?) carbonate vein-breccia, 5 to 15 centimetres thick, cross-cutting hornfelsed(?) (possibly siliceous?) siltstone of the Lower to Middle Jurassic Hazelton Group. The vein- breccia appears to fill a vertical brittle shear-fracture which trends north-northeast. No sulphides were noted in the field, but an assayed grab sample yielded 0.58 per cent lead, 0.37 per cent zinc, and 210 parts per million copper, as well as 22 parts per billion gold, and 3.0 parts per million silver.