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| View Original: | River of rocks at the Hawk Mountain, Pennsylvania 2007.jpg (1536x864) | |||
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| Keywords: River of rocks at the Hawk Mountain, Pennsylvania 2007.jpg The River of Rocks at the Hawk Mountain Pennsylvania According to www hawkmountain org this formation is a mile-long boulder field up to 40 feet deep which was deposited 10 000-12 000 years ago the end of the last ice age when glaciers stopped 40-50 miles to the north of this location A periglacial process cracked boulders from the ridgetop that gradually slid to their current position The photo was taken on July 31 2007 en wikipedia 2007-08-20 Randy42724 wikipedia en original upload log page en wikipedia 009 09 jpg 2007-08-20 03 31 Randy42724 1536×864×8 469973 bytes <nowiki></nowiki> Randy42724 Appalachian Mountains Geography of Pennsylvania Stone runs | ||||
