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Latest Volcanic arc Stories

Wilson Cycle To Impact The Atlantic Ocean
2013-10-10 05:06:34

Lee Rannals for redOrbit.com - Your Universe Online Scientists believe they have uncovered evidence that a new subduction zone may one day close the Atlantic Ocean, according to an article in EARTH Magazine. Over a period of 300 million to 500 million years, supercontinents have formed and ocean basins have opened and closed. The latest high-resolution surveys of the seafloor is the first direct evidence of the in-between phase. “Every first-year geology student learns about the...

Scientists Study Deep Rocks Under Pacific Ocean
2012-03-23 07:12:56

Scientists interested in the construction of the rock layers immediately under the Earth´s crust, the lithosphere and asthenosphere, have new tools to help analyze these layers and further understand plate tectonics. The researchers have been using seismic waves to study the lithosphere-asthenosphere boundary, or LAB. This boundary is where the hot, convecting mantle asthenosphere and the overlying cold and rigid lithosphere meet. It has been found that seismic waves move faster...

2009-06-08 09:29:41

For decades, geologists have been puzzled by the mechanisms that give rise to the kind of volcanoes that form the so-called "ring of fire" around the Pacific Ocean. These arc volcanoes, which account for about 10 to 25 percent of all volcanoes, are produced when one of the plates that make up Earth's crust plunges beneath another plate, a process called subduction.What was unclear was what factors controlled when, how and at what depth fluids and molten rock from these subducting plates are...

2aa455cf0ce1d8bf594a05bf33174fd71
2008-01-09 14:20:00

The motion, formation, and recycling of Earth's crust"”commonly known as plate tectonics"”have long been thought to be continuous processes. But new research by geophysicists suggests that plate tectonic motions have occasionally stopped in Earth's geologic history, and may do so again. The findings could reshape our understanding of the history and evolution of the Earth's crust and continents. Synthesizing a wide range of observations and constructing a new theoretical model,...

2005-06-14 17:25:31

Boulder, Colo. "“ The July-August issue of the GEOLOGICAL SOCIETY OF AMERICA BULLETIN includes several newsworthy items. Topics include: a possible 3-10-year warning mechanism for North American west-coast earthquakes; discovery of a 4600-year history of tsunamis on the Oregon coast; and present-day tilting of the Great Lakes region. Representatives of the media may obtain complimentary copies of articles by contacting Ann Cairns at acairns@geosociety.org. Please discuss articles of...


Latest Volcanic arc Reference Libraries

Pacific Ring of Fire
2013-02-19 13:18:27

The Pacific Ring of Fire, or Ring of Fire for short, is an area where a large number of earthquakes and volcanic eruptions occur in the basin of the Pacific Ocean. In a 25,000 mile horseshoe shape, it’s associated with an almost continuous series of oceanic trenches, volcanic belts, volcanic arcs and/or plate movement. The Ring of Fire contains 452 volcanoes and is home to over 75 percent of the world’s active and dormant volcanoes. It’s sometimes called the circum-Pacific belt or the...

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Word of the Day
tessitura
  • The prevailing range of a vocal or instrumental part, within which most of the tones lie.
This word is Italian in origin and comes from the Latin 'textura,' web, structure.