GLACIERS Moving mass of ice Accumulate from snow crystallizing.

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Presentation transcript:

GLACIERS Moving mass of ice Accumulate from snow crystallizing

Types of Glaciers Alpine/Valley Glaciers Continental Glaciers

Alpine/Valley Glaciers Built up snow and ice in mountain valleys

Alpine/Valley Glacier

Yosemite Valley, Ca……..Before glaciers

Yosemite Valley, Ca……..Before glaciers

Alpine Glacier Features Arête – a thin crest of rock left after two adjacent glaciers have worn a long sharp ridge into the rock Horn – 3 or more arêtes forming a sharp peak. Moraine (Medial, Lateral, Terminal) – accumulation of rock and soil at the edges of a glacier. Cirque – bowl-shaped depression left over from a glacier. Fiord - where glaciers meet an ocean or sea. Tarn – a mountain lake or pool formed from a glacier. Found usually inside a cirque. Hanging Valley – Steep valley eroded by a large glacier Striations – abrasion and gouges left on rocks associated with glaciers moving over the rock.

Yosemite, CA

Fiords in AK…Where glaciers meet the sea

Glacial Features U-Shaped Valleys created from movement

Continental Glaciers Covers large areas of land (Greenland and Antarctica) Cover 10% of Earth and represent 2% of Earth’s water supply