When scientists talk about the cryosphere, they mean the places on Earth where water is in its solid form, frozen into ice or snow. Read more ...
On Friday, 02 October 2015 from 8:00 a.m. to 5:00 p.m. (USA Mountain Time), we will be performing scheduled maintenance, which may cause temporary disruptions to our Web site, applications, and FTP. We apologize for any inconvenience this may cause you.
Glacial grooves and striations are gouged or scratched into bedrock as the glacier moves downstream. Boulders and course gravel get trapped under the glacial ice, and abrade the land as the glacier pushes and pulls them along.
This photograph shows glacial striations on rocks at Mount Rainier National Park —Credit: Photograph by Walter Siegmund
These glacial grooves are part of the Glacial Grooves State Monument located on Kelleys Island in Ohio. These grooves were scoured into the rock by an ice sheet that once covered part of North America. —Credit: Photograph by Virginia Hill
Historic glaciers pushed and dragged rocks and debris as they flowed across the landscape, gauging deep grooves into the bedrock at Glacial Grooves State Monument located on Kelleys Island in Ohio. —Credit: Photograph by Micah Maziar
Glaciers and ice sheets once covered most of Canada, and etched striations into the landscape. This photograph of striations comes from Lake Huron, Ontario. —Credit: Mary Sanseverino