Geology News And Research Archives Page 8

Innovative technology provides insight into what's below the Earth's surface (5/6/2008)

New technology which provides images from below the Earth's surface has been unveiled ...> Full Article

65-million-year-old asteroid impact triggered a global hail of carbon beads (5/6/2008)

The asteroid presumed to have wiped out the dinosaurs struck the Earth with such force that carbon deep in the Earth's crust liquefied, rocketed skyward, and formed tiny airborne beads that blanketed the planet ...> Full Article

Researchers Predict 59 Percent Chance Of Record Low Arctic Sea Ice In 2008 (5/5/2008)

Calculations indicate the record low minimum extent of sea ice across the Arctic last September has a three-in-five chance of being shattered again in 2008 because of continued warming temperatures and a preponderance of younger, thinner ice. ...> Full Article

Duo develops framework for Earth's interior (5/4/2008)

A new model of inner Earth constructed by Arizona State University researchers pulls past information and hypotheses into a coherent story to clarify mantle motion. ...> Full Article

An earthquake's aftermath (5/3/2008)

Class works to get Peruvian town back on its foundations ...> Full Article

Scientists Head to Warming Alaska on Ice Core Expedition (5/2/2008)

Scientists on the second leg of a multi-year mission to recover ice cores from glaciers in the Alaska wilderness ...> Full Article

Geochemist Challenges Key Theory Regarding Earth's Formation (5/2/2008)

Researcher calls into question three decades of conventional wisdom regarding some of the physical processes that helped shape the Earth as we know it today. ...> Full Article

Scientists Discover New Ocean Current (5/1/2008)

Scientists have discovered a new climate pattern called the North Pacific Gyre Oscillation ...> Full Article

Mapping Earth's soil moisture (5/1/2008)

Science team designing a NASA satellite mission to collect global soil moisture measurements and other data seen as key to improving weather, flood and drought forecasts and predictions of agricultural productivity and climate change. ...> Full Article

On Shaky Ground: Geological Faults Threaten Houston (4/30/2008)

After finding more than 300 surface faults in Harris County, a University of Houston geologist now has information that could be vitally useful to the region's builders and city planners. ...> Full Article

Formation of ice sheets 34 million years ago changed ocean acidity (4/29/2008)

Before ice first began to form in Antarctica around 34 million years ago, the Earth was a very different place - but then greenhouse conditions swiftly gave way to an icehouse climate, causing the oceans to become less acidic. ...> Full Article

'New' Ancient Antarctic Sediment Reveals Climate Change History (4/29/2008)

Recent additions to the premier collection of Southern Ocean sediment cores at will give scientists a close-up look at fluctuations that occurred in Antarctica's ice sheet and marine and terrestrial life as the climate cooled considerably between 20 and 14 million years ago. ...> Full Article

Twenty years of the Alaska Volcano Observatory (4/28/2008)

Volcanologists keep track of 30 volcanoes in Alaska ...> Full Article

Refining the date of dinosaur extinction (4/27/2008)

Improved rock-dating method pinpoints dinosaur demise with unprecedented precision ...> Full Article

Earthquake in Illinois could portend an emerging threat (4/27/2008)

To the surprise of many, the earthquake on April 18, 2008, about 120 miles east of St. Louis, originated in the Wabash Valley Fault and not the better-known and more-dreaded New Madrid Fault in Missouri's bootheel. ...> Full Article

Did a Significant Cool Spell Mark the Demise of Megafauna? (4/26/2008)

Researcher cites a need for more investigation into a mysterious disappearance of Earth's largest creatures and the humans that pursued them ...> Full Article

Arctic Ice More Vulnerable to Sunny Weather, New Study Shows (4/25/2008)

The shrinking expanse of Arctic sea ice is increasingly vulnerable to summer sunshine ...> Full Article

1600 Eruption Caused Global Disruption (4/25/2008)

The 1600 eruption of Huaynaputina in Peru had a global impact on human society ...> Full Article

Mountains reached current elevation earlier than thought (4/24/2008)

Sierra Nevada rose to current height earlier than thought, geologists say ...> Full Article

To a Fault: The Bottom Line on Earthquakes (4/23/2008)

Geologist discusses common misconceptions about earthquakes ...> Full Article

Lakes of Meltwater Can Crack Greenland's Ice and Contribute to Faster Ice Sheet Flow (4/21/2008)

Researchers Make First Observations of Surface Meltwater Cutting through the Ice Sheet to Lubricate the Bottom ...> Full Article

While stability far from assured, Greenland perhaps not headed down too slippery a slope (4/20/2008)

Lubricating meltwater that makes its way from the surface down to where a glacier meets bedrock turns out to be only a minor reason why Greenland's outlet glaciers accelerated their race to the sea 50 to 100 percent in the 1990s and early 2000s ...> Full Article

New hazard estimates could downplay quake dangers (4/19/2008)

The dangers posed by a major earthquake in the New Madrid and Charleston, South Carolina zones in the Midwestern and Southern parts of the United States may be noticeably lower than current estimates if seismologists adjust one of the major assumptions that go into calculating seismic hazard ...> Full Article

Methane sources over the last 30,000 years (4/18/2008)

New insights into natural changes in atmospheric methane concentrations ...> Full Article

Tiny tremors can track extreme storms in a warming planet (4/18/2008)

ata from faint earth tremors caused by wind-driven ocean waves-often dismissed as "background noise" at seismographic stations around the world-suggest extreme ocean storms have become more frequent over the past three decades ...> Full Article

Unearthing clues of catastrophic earthquakes (4/17/2008)

An inviting tale of destruction ...> Full Article

Absence of clouds caused pre-human supergreenhouse periods (4/14/2008)

In a world without human-produced pollution, biological productivity controls cloud formation and may be the lever that caused supergreenhouse episodes during the Cetaceous and Eocene ...> Full Article

Geologists Discover New Way of Estimating Size and Frequency of Meteorite Impacts (4/13/2008)

Meteorite linked to mass extinction 65 million years ago was four to six kilometers in diameter ...> Full Article

Journey to the Center of the Earth: Discovery Sheds Light on Mantle Formation (4/13/2008)

Geologist unearths ancient rocks from ocean floor dating back two billion years ...> Full Article

Why Is Arctic Sea Ice Melting Faster Than Predicted? NOAA Probing Arctic Pollution (4/12/2008)

Scientists are now flying through springtime Arctic pollution to find out why the region is warming - and summertime sea ice is melting - faster than predicted ...> Full Article