Current Mantle News and Events | Page 25

Current Mantle News and Events, Mantle News Articles.
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New Model Explains Venusian Land Forms
A new model of Venus shows that two predominant features, crustal plateaus and volcanic rises, were formed by a mechanism similar to hot spot plumes.The new interpretation comes from the mapping of surface faults and was published March 6 in Science. (1998-03-06)

Geologists: New California Volcano To Erupt In 400K Years
Research led by Rice University geologists estimates that within 400,000 years a new volcano could erupt in northern California, relatively soon in geologic terms. (1998-02-19)

Evidence Found For Molten Rock Two Thousand Miles Beneath Earth's Surface
Deep inside the earth, two thousand miles beneath its surface, pockets of molten rock can be found in a region where many scientists did not expect to find anything but solid rock. Researchers funded by the National Science Foundation report the finding in this week's issue of the journal Nature. (1998-02-11)

Fluid From Earth's Mantle Weakens The San Andreas Fault
Geochemist Mack Kennedy of the Lawrence Berkeley National Laboratory has discovered that the San Andreas Fault is intimately connected with processes very deep in the Earth. Ratios of helium isotopes in fluids from the fault zone show that much of the fluid can have come only from Earth's mantle. (1998-01-14)

Earth's Interior May Contain Oceans Of Water, Prof Says
The earth's interior may contain three to five oceans of water locked within billions of crystals that could help regulate the level of water on the surface of the planet, a University of Colorado at Boulder geologist says. (1997-12-12)

The Earth's Mysterious Inner Core Is Turning Independently, But More Slowly Than Previously Thought
The proposition that the Earth's little understood inner core is a frozen yet white hot globe of curiously laid out iron crystals, spinning independently of the rest of the planet, is confirmed by University of Washington geophysicist Kenneth Creager in tomorrow's Science. But he has also found that the inner core is not as agile as thought, turning four to 12 times slower than the Earth's two outer layers, the crust and the mantle, than previously estimated. (1997-11-13)

Mars Is A Peaceful Planet, Say U-M Geologists
Mars is a peaceful planet, say University of Michigan geologists. Limited plate motion, no giant impacts, and no large-scale mixing for 4.53 billion years according to an analysis of Mars rocks here on Earth. (1997-08-29)

Model May Explain "Super-Rotation" Of Earth's Core
Johns Hopkins geophysicists have developed a model that may help explain recent findings that suggest the Earth's solid inner core rotates faster than the rest of the planet (1997-01-23)

Geologists Find Unusual Origins For Plateau On Pacific Sea Floor
Geologists at the University of Cincinnati will report on the unusual origins of part of the Pacific Ocean crust during the American Geophysical Union meeting Dec. 18 in San Francisco. A detailed geochemical analysis indicates the crustal rocks formedunder unique conditions. Further studies could help geologists better understand the entire process of new crust formation (1996-12-18)

Earthquakes Illuminate Mantle Under Tibet
A new way of looking at seismic waves recorded at monitoring stations in Tibet can shed light on the structure of the mantle beneath this immense plateau, according to a Penn State researcher (1996-12-17)

Six-Year Drilling Project to Uncover One Million Years of Earth History
Scientists will drill as much as a million years into the geologic history of the Earth to study the evolution of Hawaii's Mauna Kea volcano, under a grant awarded by the National Science Foundation. (1996-10-18)

Model of Earth's Interior Predicts Size and Shape of Tectonic Plates
With a simple assumption and lots of supercomputer time, two National Science Foundation (NSF)-supported geophysicists have solved a long-standing problem in geology -- why the jigsaw puzzle of crustal plates on the Earth√Ęs surface looks the way it does (1996-10-01)

Bottom Layer Of Earth's Mantle May Be Partially Molten, According To Seismic Evidence
A peculiar type of seismic wave has unveiled a major surprise deep within the earth: The base of the planet's mantle, long assumed hard as a rock, instead may be partially molten. Researchers at UC Santa Cruz studied seismic waves that skim along the sharp boundary at earth's outer core. (1996-09-13)

3-D Model Of The Earth's Interior Predicts Size, Shape Of Tectonic Plates
With a simple but controversial assumption and lots of supercomputer time, two UC Berkeley geophysicists have solved a long-standing problem in geology -- why the jigsaw puzzle of crustal plates on the Earth's surface looks the way it does (1996-08-29)

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