course hero in this photograph of an ice sculpted rock, in which direction did the ice flow?

How do you know which way the ice flows?

At the bottom of the glacier, ice can slide over bedrock or shear subglacial sediments. Fun Fact: Ice flow direction is determined by the glacier surface: a glacier will always flow in the direction the ice is sloping.

How can scientists tell which direction glaciers were moving in the past?

Glacier scientists often use striations to determine the direction that the glacier was flowing, and in places where the glacier flowed in different directions over time, they can tease out this complex flow history by looking at the layered striations.

What is the movement of ice called?

Glacial motion is the motion of glaciers, which can be likened to of rivers of ice.

Which part of glacier will see the build up of ice and snow over the course of a full year?

28 Cards in this SetCompared with the amount of ice that existed during the last glacial maximum, how much exists today?1/3 as muchWhich part of a glacier will see the build-up of ice and snow over the course of a full year?Zone of accumulation26 more rows

Which direction do continental glaciers move?

Moving forward Under the pressure of its own weight and the forces of gravity, a glacier will begin to move, or flow, outwards and downwards. Valley glaciers flow down valleys, and continental ice sheets flow outward in all directions.

How do you suppose the ice glaciers could cause deep scratches and grooves in bedrock that is harder than ice?

Glacial grooves and striations are gouged or scratched into bedrock as the glacier moves downstream. Boulders and coarse gravel get trapped under the glacial ice, and abrade the land as the glacier pushes and pulls them along.

What is ice flow in geography?

A glacier is a pile of ice, and as such, deforms under the force of gravity. Glaciers flow downslope because they accumulate mass (ice) in their upper portions (from precipitation and from wind-blown snow) and ablate (melt, sublimate and calve ice bergs) in their lower portions.

Why does a glacier flow?

The sheer weight of a thick layer of ice, or the force of gravity on the ice mass, causes glaciers to flow very slowly. Ice is a soft material, in comparison to rock, and is much more easily deformed by this relentless pressure of its own weight.

What is rotational flow in geography?

Rotational flow – occurs within the corrie (cirque). It is here that the ice moving downhill can 'pivot about a point', thus producing a rotational movement. This, combined with increased pressure within the rock hollow, leads to greater erosion and an over-deepening of the corrie floor.

What direction does the ice in a valley glacier move when the terminus is retreating up the valley?

As ice in a glacier is always moving forward, its terminus retreats when more ice is lost at the terminus to melting and/or calving than reaches the terminus. During retreat, ice in a glacier does not move back up the valley.

When a glacier retreats its ice contracts and flows back toward the glacier's point of origin?

Glaciers always retreat when they reach an elevation less than 5,000 feet. When a glacier retreats, its ice contracts and flows back toward the glacier's point of origin. Glaciers can grow smaller by melting, sublimation, or calving.

Where were ice sheets more extensive during the ice age the northern hemisphere or the southern hemisphere Why?

Ice sheets were more extensive in the Northern Hemisphere because ice sheets only form on land and the Northern Hemisphere has more land in high latitudes than the Southern Hemisphere.