Northeast-southwest compressive stress in Alberta evidence from oil wells

Importance of anisotropy when estimating and measuring in situ stresses in rock

Postglacial faulting in eastern Canada: nature, origin and seismic hazard implications

Crustal stresses in Canada

In the development of plate dynamics there are two fundamental questions. First, do the plates slide over a passive asthenosphere, or are they driven by a convecting upper mantle? Second, are all ocean ridges passive, pull-apart plate margins, or do some lie above upcurrents in the mantle and in that sense become active margins? The combination of stress orientations in the crust of North America with other geophysical and geological information favours an active mantle interpretation, both for the North American plate and for the mantle upflow which lay beneath the East Pacific Rise in Tertiary times and which now lies beneath the western United States.

Mantle upflow under North America and plate dynamics

Some structures built in different rock formations in Southern Ontario have been subjected to various degrees of distress. These case histories include heaves of quarry bottoms, buckling of concret...

K. Y. Lo

Papers

Regional distribution of in situ horizontal stresses in rocks of Southern Ontario