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outcrop of eroded, dissected extinct volcano, Frio River

Detailed Description

Photograph showing outcrop of eroded and dissected extinct volcano located adjacent to the Frio River and east of the city of Uvalde in Uvalde County, Texas. Basalt is remnant of volcanic neck, and adjacent to the basalt is pyroclastic material ranging from fine-grained material to volcanic bombs, which formed the slope of the volcano. Photograph taken January 12, 2012, by Robert R. Morris.

SIR 2013–5149


Public Domain.