Geologist stands on granite dike intruding darker granodiorite

(Credit: Erin Todd, USGS. Public domain.)

Detailed Description

USGS research geologist Jamey Jones stands on a dike of granite intruding darker granodiorite, with helicopter in background.

Image Dimensions: 3648 x 5472

Date Taken: Saturday, July 15, 2017

Location Taken: AK, US