The Sonoma orogeny was the result of suturing of a volcanic island arc system onto the west coast of North America.

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The Sonoma orogeny was a geologic event that occurred during the Jurassic period, and it involved the collision and suturing of an oceanic volcanic island arc system onto the western coast of North America. This collision resulted in the formation of the California Coast Ranges, as well as other geologic features in the region.

The Sonoma Orogeny Was the Result of Suturing of a Volcanic