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This document, identified as "Rotational and accretionary evolution of the Klamath Mountains, California and Oregon, from Devonian to present time," has been approved for release and publication by the Director of the USGS. Although this document has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use.