Spider of the canyon floor

Spotted this very small spider (sorry, fotographix.ca, you commented before I typed my description!) on the cracked, parched floor of Horseshoe Canyon three days ago. This Canyon is part of the spectacular Badlands of Alberta - land of the Dinosaurs! - and is found just before you reach Drumheller, coming from Calgary. Haven't identified this little guy, but he looks different from spiders that I've seen before. (By the way, I added the black frame because the photo just looked so washed out on a white page background. I do this with some of my photos, but just for myself at home. I find that photos without frames make more attractive (to my mind) mosaics, which is why I don't normally post the framed versions here on Flickr.)

Thanks so much to The Kav (Pat Kavanagh) and Lynette S. for the ID of Wolf Spider (probably Pardosa sp.). Much appreciated.