The progress of the ice-sheet was southward, but it spread like a fan so that its widening border turned to east and west.
Under his single weight we could see the ice-sheet undulating.
Beneath this covering of ice the20 rocks were crushed and ground to atoms by the movement of the ice-sheet over them.
Underneath the ice-sheet the stones, sand, and clay behaved in the same way.
A similar belt of moraines marks out the southern termination of the ice-sheet in Finland.
Eventually, however, this later advance of the ice-sheet ceased.
This variety is interesting as a living souvenir of the day when New England was buried beneath the ice-sheet.
As the ice-sheet melted, boulders were dropped all over the Northern States and Canada.
This was before the ice-sheet melted backward toward the pole.
The ice-sheet terminating in this wall presented a more broken surface than the floating shelf-ice.
|ice sheet |
A large sheet of ice and snow that covers an entire region and spreads out under its own weight. Ice sheets have an area of more than 50,000 square km (19,500 square mi). Compare icecap.