no, the well marked groove is the "rigola" ie the drainpipe digged by falling stones, ice, snow and, sometimes, climbers :)
Give a look to the original pic (1024x768) I have reposted now
Nice photo! Welcome to my SP Favorites gallery (http://www.summitpost.org/object_list.php?parent_id=187555&object_type=3)
It seems like a bit too much violet in the snow... maybe just tweak the color balance a little to make it neutral white, but other than that it's an excellent photo!
it is a scan from and old (about 25 years)Kodachrome 25 slide