The deposits are bog Fe deposits of hydrated ochre that occur in a farm area around a pair of streams. The larger of the 2 sites on the Borden land covers an circular area of some 75 m diameter. The smaller Borden land deposit covers an area about half as large. The deposit on the Davis land is elongate nort-south and is roughly 90 by 40 m. At all 3 sites the ochre occurs within less than a metre of surface, with the ochre-rich material being in the order of a few centimeters to 1.3 m thick.

Flynn (1923) provides the only known description of the exploration done on the ochre deposits at Ardoise Hill. The prospect consists of 3 main deposits, 2 on the Borden farm and 1 on the Davis' land 400 m to the east. The northern of the 2 on the Borden land is considered to be the largest with a tonnage of 2700 tons estimated by auger holes drilled on 15 m centres. The southern of the Borden deposits is estimated to contain 620 tons and the Davis deposit has 1480 tons.