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Latest geologist Stories

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2006-05-12 19:30:54

SEATTLE -- The sheer rock fin emerging in Mount St. Helens' crater lost about a third of its northern face recently, but because lava keeps pushing to the surface, the height remained the same Thursday - around 330 feet. A burst of seismic activity at the mountain Sunday night likely corresponded to the collapse. "Certainly a big piece fell off - something like 65,000 cubic yards," said geologist Dan Dzurisin at the Cascades Volcano Observatory in Vancouver, Wash., about 50 miles from the...

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2006-05-04 19:47:06

If the skies are clear as forecast, volcano watchers who turn out for the reopening of the Johnston Ridge Observatory on Friday will get a spectacular view of a hulking slab of rock that's rapidly growing in Mount St. Helens' crater. It's jutting up from one of seven lobes of fresh volcanic rock that have been pushing their way through the surface of the crater since October 2004. The fin-shaped mass is about 300 feet tall and growing 4 feet to 5 feet a day, though it occasionally loses...

2005-12-02 06:39:43

By Tiffany Wu TAIPEI (Reuters) - Seismic activity in Taipei has increased since the world's tallest building, Taipei 101, was built, raising questions over whether the Taiwan capital has become more vulnerable to earthquakes, a geologist said on Friday. Lin Cheng-horng, a geologist at the Institute of Earth Sciences at Taiwan's most prestigious think tank, the Academia Sinica, said seismic activity historically had been low in the Taipei basin, home to about 7 million people. But...

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2005-10-10 06:14:59

What's it like to walk around on Mars in a space suit? No-one knows for sure. But geologist Dean Eppler has come as close as anyone. In this interview, he talks about his experience working in the Mark III experimental suit, as part of this year's Desert RATS field season. Astrobiology Magazine -- Early in September, several dozen scientists and engineers converged on a cattle ranch in the high desert near Flagstaff, Arizona. They were there to participate in the eighth annual Desert RATS...

2005-09-29 19:30:00

A study that applied innovative techniques to previously unexamined rock formations has turned up strong evidence on the "Slushball Earth" side of a decades-long scientific argument. The study appears in the Sept. 29 Science Express. The lead author is Alison Olcott, a Ph.D. student of earth sciences in the USC College of Letters, Arts and Sciences. Geologists agree that prehistoric Earth was locked in a deep freeze during Precambrian times, about 750 to 600 million years ago. They disagree...

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2005-05-09 07:20:00

Scientists can recite a long list of the devastating environmental consequences of a large meteorite impact, but they cannot prove these effects have led to the simultaneous loss of life around the globe. Answering the question of how and why such a large variety of species died out at the same time is one of the greatest mysteries in paleontology. Astrobiology Magazine -- At least 50 percent of the world's species, including the dinosaurs, perished 65 million years ago. A large meteorite...


Latest geologist Reference Libraries

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2005-05-26 11:00:22

Gabbro is a dark, coarse-grained, intrusive igneous rock chemically equivalent to basalt. It is a plutonic rock, formed when molten magma is trapped beneath the Earth's surface and cools slowly into a hard, coarsely crystalline mass. It is dense, greenish or dark-colored and contains varied percentages of plagioclase feldspar, pyroxene, amphibole, and olivine (called olivine gabbro when olivine is present in large quantities). Quartz gabbros are also known to occur and are probably derived...

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Word of the Day
vermicular
  • Like a worm in form or movement; vermiform; tortuous or sinuous; also, writhing or wriggling.
  • Like the track or trace of a worm; appearing as if worm-eaten; vermiculate.
  • Marked with fine, close-set, wavy or tortuous lines of color; vermiculated.
  • A form of rusticated masonry which is so wrought as to appear thickly indented with worm-tracks.
This word ultimately comes from the Latin 'vermis,' worm.
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