streams and glaeqweqweqeqeqeiers (1).ppt

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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