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Geomorphology

Geomorphology. Landforms are controlled by the local geology Climate Time. Fluvial Geomorphology. Steep sided or V-shaped Bubbling stream or placid river Banks and levees Meanders. Geomorphic Age. Youthful Mature Old age. Effects of Climate. Arid steep sides -> canyons Temperate

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Geomorphology

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  1. Geomorphology • Landforms are controlled by the • local geology • Climate • Time

  2. Fluvial Geomorphology • Steep sided or V-shaped • Bubbling stream or placid river • Banks and levees • Meanders

  3. Geomorphic Age • Youthful • Mature • Old age

  4. Effects of Climate • Arid • steep sides -> canyons • Temperate • Masswasting leads to V-shaped valleys

  5. Drainage Patterns • Dendritic • Trellis • Radial

  6. Glaciers and Climate • Last Ice Age started 2 million years ago • Consisting of pulses of Ice advance and melt • Last pulse was 12,000 years ago • Are we in an interglacial period or is the Ice age over?

  7. Anatomy of glaciers • Ice fields vs glaciers • Accumulation area and Ablation area • Retreat or advance • Laminar flow • Basal sliding • Plastic flow

  8. Glacial erosion • Rock flour • Circque - arete - horn • U-shaped valleys • Hanging valley • Striations

  9. Glacial deposits • Drift • Till • Moraine • Drumlins

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