'Welded tuff' presentation slideshows

Loess (wind-blown silt)

Loess (wind-blown silt). Terracotta soldiers of Xian, China (buried in loess from Gobi Desert). Loess Hills (lower Mississippi basin). http://www.moregruel.net/gallery/xtw?page=2. http://www.backyardnature.net/loess/geology.html. Alluvial fan (Death Valley, CA).

565 views • 27 slides

ARIZONA Raised Relief Map

456 views • 24 slides

ARIZONA Raised Relief Map

494 views • 24 slides

Crater Lake, Oregon

Crater Lake, Oregon. Crater Lake includes cliffs made of lava flows, bizarre-shaped pumice deposits and fantastic spires of rock. Can just looking at these rock formations tell us what order of events took place? Move on to the next page for an interactive journey into the crater.

359 views • 22 slides