Geological Society of America

HUGE LANDSLIDE SHAPED ZION NATIONAL PARK

U study dates slide to 4,800 years ago. The disaster dammed the Virgin River and created a lake that lasted 700 years until it filled with sediment, producing the canyon enjoyed by millions of visitors today.


NEW AWARD FOR OLD HAND AT YELLOWSTONE

After spending decades tromping around Yellowstone and Grand Teton national parks to study their volcanic and seismic hazards, awards keep pouring in for Bob Smith, a research and emeritus professor of geology and geophysics.