This information has been developed from one or more of these publications:
Pyramid Rock – 414368. 3 km south.
Off Back Beach Road.
Edwards (1945) described Quoin Hill as a volcanic plug with a small flow of lava issuing to the west. The rock is olivine basalt with titaniferous augite. The material is well exposed in a quarry near the crest of the hill.
Regional. This is the only lava eruption centre noted on Phillip Island and one of a small number in the Westernport catchment.
Class 3. On completion of quarrying operations it would be desirable to maintain one or more faces of the quarry to act as reference sites for display of the volcanic material.
Edwards, A.B. (1945). The geology of Phillip Island. Ibid. 57 (1+2) 1-21.