Yet another glacial erratic here. Number 5 in our series. This particular 10km squared area East of Airdrie seems to have, literally, TONS of these quartzite boulders dotting the prairie. This one you can see if you look slightly to the SE--unfortunately it is situated directly in someone's front yard, so please admire from where the cache is placed. This one looks like a decent size, and has a pyramid shape to it. Like so many others, because it has been sitting on the ground for so long, it lies in an area of depressed ground.
If you are not familiar with Glacial Erratics and would like to know a bit more info check out the link below. Alberta has the lion's share of these displaced boulders, as well as the largest of its kind in the world: The Okotoks Erratic. To give a short description: these rocks are "erratic" in that they are not native to this part of Alberta, and are actually giant pieces of a very specific mountain range near Jasper, Alberta. They would have been transported during Alberta's last ice age, riding the glaciers/ice sheets until the climate warmed, when the melting ice sheets would drop these huge boulders on the prairie, sometimes hundreds of kilometres from their original location.
This link has really good info, probably the best website I've found about Alberta's Erratics:
http://www3.telus.net/lejgeology/etrain/