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Originally posted by blindlyzack
Trail length also varies – two similarly sized and shaped rocks may travel uniformly, then one could move ahead or stop in its track.
Originally posted by stirling
Yes my point exactly....how come the depressed trails?
Looks like the rock was propelled through muddy groud or slush.....
the flat rock seems very flat for a windblown boulder......and its stuck into the ground like it was pushed there....
Originally posted by MarkJS
reply to post by happykat39
If so, why is it that only in certain places can ice move these huge, heavy objects? If ice moves them, then why doesn't ice move all kinds of objects wherever ice is formed?
Well, when ice is- it does create havoc with roads, creating potholes. But I don't see anything on top of the roads, or on top of the ground moving in the winter... especially with trails behind it....
edit on 5/12/2012 by MarkJS because: (no reason given)
Because the "racetrack" is a special case where the ice forms and flows differently from other places.