By: CSULB-Geology
License: Copyright, All Rights Reserved

Uploaded: 12 Mar 2021
Last Updated: 13 Mar 2021

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Chert breccia from the Miocene Monterey Formation, near Lompoc, California. Dark brown is quartz-phase chert, white is opal-CT-phase chert. Ongoing silica diagenesis after deformation from the latter to the former partially overprints the cataclastic fabric.