(Map site 16.) Outcrop found in a stream bed of the upper Miocene Monterey Formation that was deposited between 12 and 5 million years ago. It is a siliceous shale formation that in places has been completely recrystallized into chert.
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(Map site 16.) Outcrop found in a stream bed of the upper Miocene Monterey Formation that was deposited between 12 and 5 million years ago. It is a siliceous shale formation that in places has been completely recrystallized into chert. Return to the May 28 geology page. | |