North America

The shock wave raised the Appalacian Mountains in the push off from Africa.  Central America unfolded from between North and South America.  Greenland and the Northern Canadian Islands broke away from North America as it moved west.  A trench formed when the Antilles was pulled off of South America.  Friction along the entire leading edge built major mountain chains and stopped all movement.

The Appalachians exemplify impulse mountains raised at the beginning of the Shock Dynamics event.  Folding of these mountains was caused by pressure from the shock wave initiated by the giant meteorite impact east of Africa.  This is borne out by a specialist in Appalachian geology who wrote, "maximum orogeny [mountain building] took place in a linear core belt... These rocks, and any floor on which they may have rested, were as if gripped and squeezed between the jaws of a giant vise, and at the same time heated up enough to become quite plastic and to stew in their own juice, in the fluids released as they transformed into mineral assemblages."  "...for me the vise is not a metaphor but a fairly exact model.  Thus the evidence of intense shortening perpendicular to the length of the chain, not only in the folded marginal belts but also in the central core belt, is too clear for me to doubt that there was not only confining but directed pressure, the greatest compressive stress being consistently directed roughly horizontally across the orogenic belt."  "Compression then relaxed, and the thickened crust rose isostatically to form mountains and has continued to do so ever since."  As a believer in Plate Tectonics, he could not find a mechanism in the crust that could do this, but imagined mantle convection must be involved.
Rodgers, John. 1970. The Tectonics of the Appalachians. John Wiley & Sons, Inc., New York. p. 224. 

Apparently there were already two large meteorite impact craters in the protocontinent before the Shock Dynamics event.  Though Hudson Bay opened up as North America moved, their forms and central peaks can still be seen.
Brookfield, Michael E. 2003. The Eastern Hudson Bay Arc, Canada: part of a multi-ringed impact basin. in: Third International Conference on Large Meteorite Impacts, August 5-7, 2003, Nordlingen, Germany. p. 4010.