Hickson, C. J., Columnar joints in a solidified lava flow. These regular, polygonal joints form as a result of contraction as the lava cools., Natural...
Hickson, C. J., Eve cone is a young, well preserved cinder cone at Mount Edziza, British Columbia., Natural Resources Canada Photo Collection # 2000-129, 1995
Hickson, C. J., Scoriaceous tephra from the Nazko cone, central British Columbia. The smaller pieces (less than 6.4 cm long) are lapilli sized and the larger...