GEOL107 Chapter Notes - Chapter 13: Silt, Deflation, Alluvial Fan
15 Oct 2018
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Document Summary
As moist air is forced up to pass over a mountain range, it expands and cools and loses moisture by condensation as it rises. Dry air coming down the other side of the mountain compresses and warms and brings high evaporation with little or no rainfall to the downside of the range. Tropical coasts next to cold ocean currents. Arid climate with snow or ice cover. Desert topography is different from humid regions. Stream drain toward landlocked basins instead of toward the sea. As a basin fills with sediment, its surface rises and leads to a rising base level. Due to high runoff - local floods to high discharge and short duration. More common in arid regions than in humid regions. Can effectively erode the land surface in a desert region. Can easily erode enough sediment to become mudflow. Narrow canyons with vertical walls and flat, gravel-strewn floors. Shortage of water slows chemical weathering processes.
