GEOL 553 LAB 06: Pluvial Lakes TODAYS MATERIAL: Pluvial Lakes Pluvial Lakes Constructional and Erosional Landforms Constructional and Erosional Landforms.

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GEOL 553 LAB 06: Pluvial Lakes TODAYS MATERIAL: Pluvial Lakes Pluvial Lakes Constructional and Erosional Landforms Constructional and Erosional Landforms GIS Mapping GIS Mapping Correlation Correlation

two

geology/

Hurst Castle spit

A bar is a long, narrow stretch of pebbles and sand (1) which grows across a bay (1) attached to the land at both ends. (1) It forms when longshore drift occurs on a coastline. (1) When the coastline ends, the sea deposits the material it is transporting because the change in depth affects its ability to transport the material further. (1) If a spit develops in a bay, it may build across it, linking two headlands to form a bar. (1) This is only possible if there is a gently sloping beach (1) and no river entering the sea, (1) because the sand will be removed faster than it can be deposited. (1)

Fetch: The length of water the wind blows over. Longer distance waves have more energy (1), more power to erode (1), increasing hydraulic action/abrasion (1).

Alluvial Fan aerial photo with topo overlay, Copper Canyon, Death Valley, California.

na%2C_NASA%2C_ASTER.jpg A vast alluvial fan blossoms across the desolate landscape between the Kunlun and Altun mountain ranges that form the southern border of the Taklimakan Desert in China’s XinJiang Province. The left side is the active part of the fan, and appears blue from water currently flowing in the many small streams. The image was acquired May 2, 2002, covers an area of 56.6 × 61.3 km, and is centered near 37.4 degrees north, 84.3 degrees east.