I’m not sure about the composition of the Kelso Dunes in the Mojave Preserve. The link I provide in the following states that the dunes are from different sources, stacked together. Now, I have a freind that seems more than knowledgeable about these things, and he told me the dunes were made primarily of rose quartz. That he had taken a microscope to the dunes once and examined a sample of the sand grains. He told me these grains of sand were curiously perfectly spherical, and that may account for the ‘booming’ quality of the dunes.

Maybe they are from several different sources as the link claims. I’m not a geologist or expert in eolian forces. It’s all interesting to me, but for now I’ve chosen to run with saying the dunes are composed generally of rose quartz. Why? Well, because it sounds cool, and, because I can.

Kelso Dunes in the Mojave National Preserve