|
glacial-erratics-yosemite-olmsted-point-09966.jpg |
|
|
|
|
Glacial Erratic Boulder
Glacial erratics atop Olmsted Point. Erratics are huge boulders left behind by the passing of glaciers which carved the granite surroundings into their present-day form. Yosemite National Park, California, USA, Copyright Phillip Colla, Oceanlight.com
|