GSA Today
Volume 19, Number 3 (March 2009)

About the cover:
Air oblique view of northern rim of Rangiroa atoll in Tuamotu Archipelago of French Polynesia. Visible islets cap a segment of the annular reef of the atoll rim (circumference ~165 km with ~100 total islets). Open ocean to left, with breaker line on atoll exterior. Interior atoll lagoon on right. See “Pacifi c atoll living: How long already and until when?”
by W.R. Dickinson, p. 4–10.

© The Geological Society of America, Inc.