GSA Today
Volume 23, Number 6 (June 2013)

Cover image

About the cover:
Ikonos satellite image of the Upper Geyser Basin region in Yellowstone National Park. Light colored areas are silica-rich geothermal deposits (sinter). The drainage pattern from Old Faithful appears to be mainly to the north (top) to the Firehole River. Source: DigitalGlobe.

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