Residual iron oxide deposits are common in the Taseko River region of southwestern Chilcotin where conditions are suitable for the development of these deposits, i.e. a source of iron (usually pyritic sediments and volcanics) and relatively stable depositional conditions.

The Feo Creek bog iron showing, 3.5 kilometres southwest of Dorrie Peak, consists of a thin, rectangular sheet of limonite on a flat glacially-carved bench on the north side of Feo Creek. The limonite ranges up to 1 metre in thickness and includes a large proportion of talus rock fragments. The iron was presumably leached from altered pyritic volcanic rocks of the Upper Cretaceous Powell Creek Formation that outcrop on the ridges to the north and east.

A minimum estimate of inferred reserves are 15,900 tonnes grading 48 per cent iron (Geological Survey of Canada Summary Report 1920A, pages 42A-70A).