Glaciers

What is a Glacier?

-large mass of ice that forms on land areas

-amount of accumulation must be greater than ablation

Zone of Accumulation: where snow and ice accumulates

Zone of Ablation: Where melting occurs

Terminus: The farthest extent of a glacier

Continental:

Large scale glaciation covering surfaces of continents…Antarctica

Alpine Glaciation: S

Smaller scale glaciation that occurs in mountains…Mt Rainer, Glacier Natl Park

Different Kinds of Glaciers pg 246

-ice sheet is a vast shield of ice usually kms thick

-valley glaciers are long and flow down valleys

review others…

-Till is loose material left behind by glaciers

Many Terms to review in charts on pages 248-249 Main ones:

-Terminal, Lateral and Medial Moraines

-Drumlins, EskersLoess

-Cirque, Arete, Horn, Glacial Trough, Striations and Polish

Review others

Glaciers as Global Thermometers….

Glaciers grow during Icehouses

Glaciers recede during Hothouses