Pomez Stone Field

March 23, 2020

IMG_20200211_233633_063 (1)

March 2020 Viewer's ChoicePhotographer: Emanuel Vásquez 
Summary Authors: Emanuel Vásquez; Jim Foster

The landscape featured above, part of the Atacama Plateau in northwestern Argentina, is characterized by an extensive accumulation of pumice, which after tens of thousands of years of physical erosion has acquired its present-day morphology. The very high elevation (average elevation of 14,800 ft or 4,500 m) and dry climate of the Pomez Stone Field helped create this unusual plateau landscape. Because the plateau is subjected to considerable diurnal thermal amplitude, frequently 35 degrees F (20 C) or more between the daily maximum and minimum temperatures, freeze-thaw cycles accelerate erosion rates. Photo taken on February 8, 2020.

Photo Details: Camera: Nikon D750; Lens: Sigma 70 200; Exposure Time: 1/4000); Aperture: ƒ/2.8; ISO equivalent: 50.