(Map site 1.) Roadcut exposure of gneiss along Big Tujunga Canyon Road. The age of this gneiss is not known, but it has to be older than the oldest igneous rock that intrudes it, the Wilson Diorite dated at about 120 million years old.
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(Map site 1.) Roadcut exposure of gneiss along Big Tujunga Canyon Road. The age of this gneiss is not known, but it has to be older than the oldest igneous rock that intrudes it, the Wilson Diorite dated at about 120 million years old. Return to the June 12 geology page. | |