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Detail of model area showing geologic cross sections

Detailed Description

Northeast view of model area showing geologic cross sections overlain on top of bedrock layer (Green). Tan, orange, and yellow geologic units in cross sections include middle and top model layers combined, consisting of the Miocene Nogales Formation, late Miocene to early Pleistocene basin fill, and early Pleistocene to Holocene alluvium; pink colors are Oligocene volcanic rocks and Cretaceous diorite intrusion. Mount Benedict horst block in center; Grand Avenue fault shown in gray.

Sources/Usage

Public Domain.