called the Tuff of Bluff Point." Such smaller eruptions could be explosive too. While they may not send an umbrella cloud of ash across the U.S., such an event would still "create a sizeable ash ...

The Hawaiian name for Diamond Head is Le'ahi. It is a tuff cone (consolidated volcanic ash) crater that was created 300,000 years ago during a single volcanic eruption that spewed ash into the air.

to the solidified ash flow at Tuff Cliff, to an overall view of the Yellowstone Caldera at the Washburn Hot Springs Overlook. Small wonder this is one of the 25 most-visited parks within the National ...