Land, Sea, & Sky - Photography By Lanny

You don't take a photograph, you make it.   -- Ansel Adams

Powered by SmugMug Log In

Clouds & Dunes

Some of the smaller dunes photographed at the Great Sand Dunes National Park and Preserve east of Alamosa, Colorado.

Winds that often top 40 miles an hour continually reshape the crests of the tall dunes, and smaller dunes may "migrate" several feet in a week. The dunes show a remarkable permanence of form, though, which geologists attribute to opposing winds. Prevailing southwesterly winds blow the dune mass northeasterly toward the mountains, and occasional but powerful northeasterlies blow the dunes back toward the southwest. This 'back-and-forth' action of the wind piles the dunes vertically, and contributes to the stability of the dunefield. Fromf -

Sand DunesGreat Sand Dunes National Park and Preserveblack and white