a volcanic tuff cone. A Diamond Head lookout Start your weekend by heading toward Diamond Head, the Oahu landmark that was formed by a volcanic eruption some 300,000 years ago and looms on the ...

The Seongsan Ilchulbong tuff cone has exceptional exposures of its structural and sedimentological characteristics, making it a world-class location for understanding Surtseyan-type volcanic eruptions ...

"Volcanic islands are some of the simplest landforms ... which would destabilize the tuff cone in six to seven years, leaving only a land-bridge between the two adjacent older islands.

30 January 2013, 11:30am - Small tuff cone forming; Volcanic Alert remains at level 1, Aviation Colour Code remains Orange. The ‘hot lake’ has now dried out and a small tuff cone has started ...

During a field trip to the Lava Creek Tuff near Shell, Wyoming, scientists discovered evidence of two major volcanic eruptions. | Credit: USGS/Photo by Madison Myers. Scientists in Wyoming have ...

Scientists in Wyoming have discovered evidence of two mysterious volcanic eruptions that are older than the last caldera-forming supereruption at Yellowstone. The ash deposits were buried beneath ...

The olivine here originates from nearby volcanic tuff cones, eroded over time and blended with the fine, flour-like sand. This remote shore, part of a UNESCO World Heritage site, is a sanctuary ...

Scientists have found previously undocumented ash deposits buried beneath the Lava Creek Tuff in Wyoming — and at least one of them could be from an unknown volcanic eruption, they say.