Narrows Earth Trail is a hiking trail in San Diego County, California. It is within Anza-Borrego Desert State Wilderness. It is 0.4 miles long and begins at 1,078 feet altitude. Traveling the entire trail is 0.8 miles with a total elevation gain of 132 feet.
Narrows Earth Trail Professional Reviews and Guides
"A half-mile loop, with a self-guiding brochure, that follows the edge of an alluvial fan. The points along the trail focus on the geologic history of the region, revealed in the naked rock walls of this canyon. Fault lines, rock formation, and erosion are some of the lessons of the Earth Narrows Trail. The seven stops on the loop provide an introduction to the forces that created Anza-Borrego topography."
--Bill & Polly Cunningham, Hiking California's Desert Parks (Falcon Guides).
"Stop by the Narrows Earth Trail for what is not necessarily a simple lesson in geology. Most of the northern Vallecito Mountains consist of granitic rock uplifted fairly recently in a geologic sense. Detachment faulting—the slumping of large blocks of landscape due to tensional forces—is also suspected. Here, in an area heavily fractured by faulting, it is possible to view some very old meta-sedimentary rock in close proximity to much younger granitic rock. The metamorphosed layers of sand and mud represent the most ancient (roughly 500 million years old) kind of rock exposed in the Anza-Borrego Desert."
--Jerry Schad, Afoot & Afield: San Diego County (Wilderness Press).
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