A photo of The Elephant Tusk.

A photo of The Elephant Tusk.

Detailed Description

The Elephant Tusk is a prominent eroded remnant of a Tertiary-age igneous (granitic) intrusion in the Chisos Mountains of Big Bend. Prickly pear cacti grow on a ledge of Boquillas Formation in the foreground. Midway in the distance are cuestas (escarpments of gently-inclined strata) consisting of marine, transitional, and non-marine sedimentary layers of the Aguja and Javelina Formations of latest Cretaceous age (Maxwell and Lonsdale, 1966).

Details

Image Dimensions: 800 x 600

Date Taken:

Location Taken: US