These striking basalt towers overlooking the Wallula Gap on the Columbia River have been landmarks since prehistoric times. Native Americans built legends to explain them. Geologists note that they were probably scoured out of the ridge top by the Missoula Floods near the end of the ice age.
Copyright: G. Donald Bain Type: Spherical Resolution: 8000x4000 Taken: 04/08/2014 上传: 22/10/2014 Published: 09/03/2015 观看次数:
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