Friction Beats Gravity, For Now

December 01, 2020

3 b Rocks


Photographer: Stan Wagon
Summary Authors: Stan Wagon

South-central Utah is known for its striking sandstone hoodoos, with the most famous ones consisting of Entrada Sandstone capped by Dakota Sandstone. The angular towers seen here are unusual in that they consist entirely of Navajo Sandstone. These three, including the one that's very delicately balanced (far right and below) were formed when differential erosion occurred at irregular rates due to variability of content and hardness in the various strata; the more resistant rock remains when softer material is removed. Photos taken October 21, 2020.

Photo Details: Camera: Sony A6500 digital SLR; E 16-70 lens. Top - 1/400 sec, ƒ/10 aperture, ISO 160 focal length 20 mm (29 mm at traditional full-frame 35 mm camera). Bottom - 1/640 sec., ƒ/10 aperture, ISO 250 19mm (28 mm at full frame 35 mm camera).