Encore - Glacial Erratic
February 17, 2018
Today and every Saturday Earth Science Picture of the Day invites you to rediscover favorites from the past. Saturday posts feature an EPOD that was chosen by viewers like you in our monthly Viewers' Choice polls. Join us as we look back at these intriguing and captivating images.
Photographer: Mark Meyer
Summary Author: Mark Meyer
The photo above showing a delicately balanced boulder was captured in the ablation zone of the Matanuska Glacier near Anchorage, Alaska. This angular rock, about 10 ft (3 m) across, was transported by the glacier from far up the valley. Eventually, the remaining bit of ice will melt out from underneath it leaving behind a large, isolated rock -- a glacial erratic. Photo taken on July 29, 2009.