Deserts. Less than 10 inches of precipitation per year Is San Diego considered to be in a desert area?

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Presentation transcript:

Deserts

Less than 10 inches of precipitation per year Is San Diego considered to be in a desert area?

San Diego Average Rainfall

San Diego Rainfall

Deserts of the World

Low Latitude Deserts

Low Latitude Deserts 30 degrees above and below equator

Mid Latitude Deserts and Rainshadows

Irregular, Large, Thunderstorms

Flashfloods in Desert Wash

Terms

Coalescing Alluvial Fans

Deflation and Blowouts

Deflation

Desert Pavement

Formation of Sand Dunes

Sand Dune Slip Face

Navajo Sandstone Paleo Sand Dunes Largest Crossbeds

Sand Dune Types

Barchan Limited sand and flat with little vegetation

Barchan Dune Features

Barchan Dunes

Transverse Steady wind lots of sand little vegetation Largest in size

Transverse Dunes

Longitudinal Moderate sand with variable wind

Longitudinal Dunes

Star Dunes Variable wind direction

Star Dunes

Badwater Fan Death Valley

Black Mtns, Death Valley

Southern Death Valley, California Panamint Range along top Black Mountains bottom of photo Badwater Fan is furthest left fan along the Black Mountains. Furnace Creek fan farthest right along the Black Mountains.

Barchan Dune Tibet

Sand Dunes-Mars