Figure A13. White Horse BluffWhite Horse Bluff is a deceptive volcano. Only a trained eye can pick out the yellow-weathering hyaloclastite and recognize that this is indeed a volcano. Formed by repeated subaqueous explosions, the volcano eventually built up above the water level. It was fed by dykes (dark areas on the cliff face) cutting through the hyaloclastite and ceased erupting soon after breeching the surface of the water.
(Photograph by C.J. Hickson (Geological Survey of Canada)) |