Glacial Processes

Glacial Processes - This creates several different types of...

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Glacial Processes Glacial Processes Glaciers are large masses of ice that move over time
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On the basis of size and shape, glaciers can be divided into two types: 1) Valley glaciers – Glaciers that flow down well defined stream valleys in mountainous regions
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2) Continental glaciers – Large ice sheets that cover most of a continent and flow independent of topography
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There are two main zones of a glacier: 1) Zone of Accumulation – Here snow and ice accumulate and flow toward the: 2) Zone of Ablation – Snow and ice are lost through melting, sublimation, and calving
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If accumulation > ablation, glacier advances If accumulation < ablation, glacier retreats If accumulation = ablation, glacier remains a constant size
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As glaciers move they erode and transport sediment and rock.
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Unformatted text preview: This creates several different types of erosional and depositional features and distinct water bodies. Common features include:- Cirques- Lateral Moraines- Glacial Striations- Terminal Moraines- Erratics and Till- Lateral Moraines- Drumlins- Kettles Glacial Striations Glacial Till Drumlin Lateral Moraine (dark brown running from center to lower left) Formation of a kettle Glacier development is influenced by climate changes, which can be attributed to three astronomical cycles During warmer periods, glaciers retreat (melt), causing sea-level to rise During cooler periods, glaciers advance, causing sea-level to fall If all of the ice on Earth melted (25 million km 3 ) sea-level would rise 65 meters...
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Glacial Processes - This creates several different types of...

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