Stretching more than 4 miles long and 4,000 feet wide, the picturesque pile of blocky andesite, known as the Parkdale Lava Flow, offers panoramic, backcountry views of snow-capped mountains and ...

Several years ago, the U.S. National Science Foundation (NSF) funded the CALIPSO project ('Caribbean Andesitic Lava Island Precision Seismo-geodetic Observatory').

Domes may consist of one or more individual lava flows. An aerial view of the 600-foot lava dome in the crater of Washington's Mt. St. Helens, as seen between the May and July eruptions in 1980.

Andesitic volcanoes occur throughout the world in such places as Japan, Indonesia, the Andes, the Aleutian Islands and the North American Cascades. They often form lava domes when active.

Characteristic features of many porphyritic andesite and dacite lavas are that they are rich in crystals and display a range of disequilibrium features, including reversely zoned crystals ...

Andesitic and dacitic domes, such as the recently active Soufrière Hills volcano (Montserrat) 2, Mount St Helens (USA) 1 or Galeras (Colombia) 8, extrude lava over timescales of years to decades ...

Andesitic volcanoes occur throughout the world in such places as Japan, Indonesia, the Andes, the Aleutian Islands and the North American Cascades. They often form lava domes when active.