2007-10-30 10:09:36 · 4 answers · asked by basheen b 1 in Science & Mathematics ➔ Earth Sciences & Geology
Also it is what´s left after the lighter soils, with organic humus components, and the fine clayparticles have been blown away by the winds. With no humidity or vegetation to bind the soil a desert is an easy prey for winderosion.
2007-10-30 10:21:05 · answer #1 · answered by DrAnders_pHd 6 · 0⤊ 0⤋
THE SAHARA HAS BEEN ARID FOR 3-4000 YEARS, AND THE SAND IS A RESULT OF THE EROSION OF THE SOIL THAT WAS THERE. THE FINER PARTICLES HAVE BEEN CARRIED AWAY BY WIND LEAVING THE LARGER PARTICLES AS SAND.
2007-10-30 11:44:55 · answer #2 · answered by Loren S 7 · 0⤊ 0⤋
not positive but it was probably at some point part of an epicontinetal sea
and sedient from weathing/erosion processes deposited the sand...
everyone here had a good answer, take a bit from each but mine is more of a guess without looking it up
2007-10-30 19:02:14 · answer #3 · answered by ThisFieldIsMandatory 1 · 0⤊ 0⤋
The sand is broken down rock from thousands upon thousands of years of weathering by wind, water, and salt.
2007-10-30 10:13:32 · answer #4 · answered by ecolink 7 · 0⤊ 0⤋