18 September 2020

Friday fan: Death Valley, California

Posted by Callan Bentley

Working up some new images for my free, online Historical Geology textbook, I annotated a photograph I took in March of this alluvial fan in southern Death Valley. The development of desert varnish on older parts of the fan shows their age visually in a quick and easy way of determining fan deposit sequence:

I’ve been making a lot of these animated annotations as a way of conserving space in the “real estate” of the online text’s pages.

Happy Friday. Back to folds next week!