Abstract
Thousands of linear elements (joint traces, river trends and photolinears) have been identified and statistically analysed in the Province of Alberta, Canada, from the U.S. border to the Fort McMurray area. A statistical evaluation was performed on the data by fitting Dimroth-Watson distributions to groups of them. It is suggested that the joints represent shear surfaces formed in a neotectonic stress field whose maximum compression is oriented normal to the front of the Rocky Mountains, at least in the vicinity of that range. Further to the northeast, the stress trajectories swing to E-W and N-S directions. The river courses in Alberta do not align themselves with the joints and are presumably controlled by the general slope of the land towards Hudson's Bay. The photolineaments are features of uncertain origin and age.
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