3.3 Erosion and Deposition of Ice Done By: Laura, Elizabeth, Erin, and Gabby

Questions to Ponder Describe continental glaciers. Give details! How does glacial erosion affect us personally?

THE DIFFERENT KINDS There are two kinds of common glaciers Continental - one of the largest kinds of glaciers, which can cover whole country! Alpine – valley glaciers are a very common type of Alpine Glacier. They shape valleys into “U” shapes and are usually near mountains.

Continental Glaciers HOW THEY’RE FORMED & WHERE THEY’RE FOUND Cover all of Greenland Covered many parts of North America 10,000 years ago Form at high altitudes where temperatures are low enough to allow snow and ice to accumulate all year round Only contains fresh water

Alpine Glaciers HOW THE’RE FORMED AND WHERE THEY’RE FOUND When snow falls on floors of valleys in high mountain regions, it accumulates because the rate of melting in summer is slower than the rate at which it falls

Glacial Deposits Till – unsorted rock material that is deposited directly by the ice when it melts Most common is moraines, they generally form ridges along the edges of glaciers Stratified drift – a glacial deposit that is sorted into layers based on the size of rock material Outwash plain – the area in front of the glacier where streams carry material and sort it. Then it is deposits it in front of the glacier Kettle – when ice melts and sediment builds up around the block of ice and a depression forms

Glacial Erosion and Us! Some glaciers can erode away land to form wide flat spaces. A few of these spaces may even have a slight dip in the land. As glaciers melt, they get stuck in these dips to form lakes. Years later, houses are built near these lakes for recreation.

F UN F ACTS Glaciers can cover the entire parts of continents. Glaciers store up to 75% of our world’s fresh water. The largest glacier is 840 square miles. 100 feet per day is the fastest a glacier can move. 10% of earth’s land is covered by glaciers. If all of the glaciers were to melt then sea level would rise 230 feet.

-Glaciers can erode land to form flat land. Some of these places can be used as a form of entertainment, such as lake houses near a lake formed from a glacier.  Describe continental glaciers. Give details! - Continental glaciers only contain fresh water, they can cover whole countries, they once covered most of north America, and form at high altitudes.  How does glacial erosion affect us personally?