Magnetite outcrops in the steep bank of Eagle Creek at an elev- ation of 91 metres, 400 metres from the shore of Pryce Channel on West Redonda Island. An open cut on the Black Warrior (L.2446) claim, prior to 1918, in the bank of Eagle Creek uncovered a solid magnetite zone 4.3 metres wide, nearly 15.2 metres high and of undetermined length. Magnetite is hosted in skarn altered limestone and/or green- stone near the contact with diorite. A sample chipped across the width of the face, 4.3 metres, assayed 64.8 per cent iron, 5 per cent silica and trace phosphorous and sulphur (Minister of Mines Annual Report 1919, page 216).

The island's geology is composed of intrusive rocks of the Jurassic to Cretaceous Coast Plutonic Complex. Age dating from the southern part of West Redonda Island indicates an age of 111 to 113 million years by potassium-argon from biotite and hornblende (Geological Survey of Canada Open File 480). Locally, highly meta- morphosed greenstone and limestone of unknown group, formation or age are found in diorite.

There are three magnetite occurrences on West Redonda Island. They have almost identical geologic settings and are close enough to each other to indicate the possibility of a continuous zone (Open File 1988-28, page 68). The three occurrences are Redonda Iron Mine (092K 039), Black Warrior (092K 040) and Homestake (092K 063).