The name of this rock is Okotoks, derived from the Blackfoot name for rock okatok.It is sitting here on the edge of the Alberta prarie after origininating in a landslide that fell on a glacier somewhere between 10,000 to 18,000 years ago (I am not sure exactly when :-). The glacier flowed out of the Canadian Rockies at Jasper, turned South, flowed past Calgary, and when it got warm again dropped the rock here.
Rocks deposited this way are called glacial erratics. This one happens to be the biggest one in the world at 16,500 tonnes with dimensions of 41 x 18 x 9 meters.
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