GSA Today
Volume 21, Number 11 (November 2011)

About the cover:
Oblique view northwest up the Gulf of California with the Baja California peninsula on the left and mainland Mexico and Southwestern United States on the right. Note the WNW-trending transform faults and short spreading centers in the southern Gulf of California and the shallow northern Gulf of California and low elevation Salton trough regions through which faults link to the San Andreas fault. Mountains on the mainland are the Sierra Madre Occidental and smaller ranges of the Basin and Range province. Image courtesy geomapapp.org. See related article, p. 4–10.

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