A section of brahma schist on the Trail of Time, Grand Canyon South Rim, Arizona, USA.
Brahma Schist—Consists of amphibolite, hornblende-biotite-plagioclase schist, biotite- plagioclase schist, orthoamphibole-bearing schist and gneiss, and metamorphosed sulfide deposits. Mafic to intermediate-composition metavolcanic rocks. About billion years old. "The Trail of Time is an interpretive walking timeline that focuses on Grand Canyon vistas and rocks and invites visitors to ponder, explore, and understand the magnitude of geologic time and the stories encoded by Grand Canyon rock layers and landscapes. The exhibit follows the existing paved rim trail on the South Rim of Grand Canyon between Yavapai Observation Station and Grand Canyon Village and is marked by brass markers every meter, representing one million years of time. Viewing tubes and other interpretive materials help visitors connect the rocks visible in Grand Canyon to their place along the geologic timeline." NPS web site
Size: 4866px × 3244px
Location: Grand Canyon South Rim, Arizona, USA
Photo credit: © Maurice Savage / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: amphibolite, biotite-, brahma, canyon, cross, crystalline, display, early, geology, gneiss, grand, hornblende-biotite-plagioclase, metamorphic, national, nps, orthoamphibole-bearing, park, plagioclase, proterozoic, rim, sample, schist, section, service, south, states, supergroup, time, trail, united, usa, walk
