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Scientists dig for fossils in L.A. a century later

October 28, 2013 3:28 pm | by Alicia Chang, AP Science Writer | News | Comments

Digs over the years at the La Brea Tar Pits in the heart of Los Angeles have unearthed bones of mammoths, mastodons, saber-toothed cats and dire wolves that became trapped in ponds of sticky asphalt. But it's the smaller discoveries, like plants, insects and rodents, that in recent years are shaping scientists' views of life in the region 11,000 to 50,000 years ago.

Neutrons, electrons and theory reveal secrets of natural gas reserves

October 28, 2013 3:08 pm | News | Comments

Gas and oil deposits in shale have no place to hide from an Oak Ridge National Laboratory technique that provides an inside look at pores and reveals structural information potentially vital to the nation’s energy needs. The research could clear the path to the more efficient extraction of gas and oil from shale.

Curiosity confirms origins of Martian meteorites

October 16, 2013 2:40 pm | News | Comments

Earth’s most eminent emissary to Mars has just proven that those rare Martian visitors that sometimes drop in on Earth really are from the Red Planet. A key new measurement of Mars’ atmosphere by NASA’s Curiosity rover provides the most definitive evidence yet of the origins of Mars meteorites while at the same time providing a way to rule out Martian origins of other meteorites.

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Iron melt network helped grow Earth’s core

October 8, 2013 10:23 am | News | Comments

The same process that allows water to trickle through coffee grinds to create your morning espresso may have played a key role in the formation of the early Earth and influenced its internal organization, according to a new study by scientists at Stanford Univ.'s School of Earth Sciences.

Terahertz time-domain spectroscopy for oil and gas detection

September 12, 2013 9:49 am | News | Comments

Kerogen is a mixture of organic chemical compounds in sedimentary rocks that is a key intermediate of oil and natural gas. After five years of research, researchers in China have developed a terahertz time-domain spectroscopy method that effectively detects the generation of oil and gas from kerogen without contact or destruction of the sample material.

Scientists strike scientific gold with meteorite

September 11, 2013 11:40 am | News | Comments

An important discovery has been made concerning the possible inventory of molecules available to early Earth. Scientists at Arizona State Univ. have found that the Sutter’s Mill meteorite, which exploded in a blazing fireball over California last year, contains organic molecules not previously found in any meteorites. These findings suggest a far greater availability of extraterrestrial organic molecules than previously thought possible.

Scientists confirm existence of largest single volcano on Earth

September 6, 2013 9:25 am | News | Comments

A Univ. of Houston professor led a team of scientists to uncover the largest single volcano yet documented on Earth. Covering an area roughly equivalent to the British Isles or the state of New Mexico, this volcano, dubbed the Tamu Massif, is nearly as big as the giant volcanoes of Mars, placing it among the largest in the Solar System.

Terramechanics research aims to keep Mars rovers rolling

September 5, 2013 11:34 am | by Jennifer Chu, MIT News Office | News | Comments

In May 2009, the Mars rover Spirit cracked through a crusty layer of Martian topsoil, sinking into softer underlying sand. The unexpected sand trap permanently mired the vehicle. The mission mishap may have been prevented by a better understanding of terramechanics, which describes the interaction between vehicles and deformable terrain.

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Study: Gravity variations much bigger than previously thought

September 4, 2013 4:22 pm | by Megan Meates, Curtin Univ. | News | Comments

Using detailed topographic information obtained from the U.S. Space Shuttle, a joint Australian-German research team has created the highest-resolution maps of Earth’s gravity field to date. The maps feature more than 3 billion points and show gravitational variations up to 40% larger than previously assumed.

New research supports theory that life started on Mars

August 29, 2013 2:09 pm | News | Comments

Steven Benner of Westheimer Institute for Science and Technology will tell geochemists gathering Thursday at the annual Goldschmidt conference that an oxidized mineral form of the element molybdenum, which may have been crucial to the origin of life, could only have been available on the surface of Mars and not on Earth.

Ice that burns helps make potable water from oil and gas production

August 29, 2013 9:13 am | News | Comments

In the midst of an intensifying global water crisis, scientists are reporting development of a more economical way to use one form of the “ice that burns” to turn very salty wastewater from fracking and other oil and gas production methods into water for drinking and irrigation. The method removes more than 90% of the salt.

Cassini data from Titan indicates a rigid, weathered ice shell

August 28, 2013 2:35 pm | by Tim Stephens, UC Santa Cruz | News | Comments

An analysis of gravity and topography data from Saturn's largest moon, Titan, has revealed unexpected features of the moon's outer ice shell. The best explanation for the findings, say scientists, is that Titan's ice shell is rigid and that relatively small topographic features on the surface are associated with large roots extending into the underlying ocean.

3-D Earth model accurately pinpoints source of earthquakes, explosions

August 22, 2013 7:58 am | News | Comments

During the Cold War, U.S. and international monitoring agencies could spot nuclear tests and focused on measuring their sizes. Today, they’re looking around the globe to pinpoint much smaller explosives tests. Sandia National Laboratories and Los Alamos National Laboratory have partnered to develop a 3-D model of the Earth’s mantle and crust called SALSA3D, with the purpose to assist in locating explosions.

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Study determines rate of release for old permafrost carbon

August 21, 2013 1:10 pm | by Peter Rüegg, ETH Zurich | News | Comments

Using indicator molecules, a team of researchers working in Eurasia has for the first time assessed contributions of old carbon from permafrost soils to riverine carbon headed. They were also able to demonstrate that permafrost soils where the frozen areas are interspersed with gaps release more old carbon than those where the permafrost is uninterrupted.

Magma can survive in upper crust for hundreds of millennia

August 20, 2013 12:33 am | by Vince Stricherz, Univ. of Washington | News | Comments

Reservoirs of silica-rich magma can persist in Earth’s upper crust for hundreds of thousands of years without triggering an eruption, according to new modeling research. That means an area known to have experienced a massive volcanic eruption in the past, such as Yellowstone National Park, could have a large pool of magma festering beneath it and still not be close to going off as it did 600,000 years ago.

S.F. Bay Area building demolition fuels quake study

August 19, 2013 11:11 am | by Mihir Zaveri, Associated Press | News | Comments

With a series of quick blasts and a cloud of dust a 13-story building on the Cal State-East Bay campus crashed to the ground Saturday morning as scientists monitored the impact on the nearby Hayward Fault. U.S. Geological Survey scientists had placed more than 600 seismographs in concentric circles within a mile of the building to pick up the vibrations and verify whether their predictions were correct.

Antarctic ice core sheds new light on how the last ice age ended

August 15, 2013 3:18 pm | News | Comments

Analysis of ice samples taken by the West Antarctic Ice Sheet (WAIS) Divide drilling project reveals that warming in Antarctica began about 22,000 years ago, a few thousand years earlier than suggested by previous records. This timing shows that West Antarctica did not "wait for a cue" from the Northern Hemisphere to start warming, as scientists had previously supposed.

Deep Earth heat surprise

August 9, 2013 8:20 am | News | Comments

Researchers at the Carnegie Institution and the Univ. of Illinois have for the first time been able to experimentally simulate the pressure conditions in the Earth’s mantle to measure thermal conductivity. A new technique using the mantle material magnesium oxide allowed the team to discover that heat transfer is actually lower than what has been claimed by other predictions and amounts to about 60% used by civilization today.

Carbon under pressure exhibits interesting traits

August 8, 2013 7:44 am | News | Comments

High pressures and temperatures cause materials to exhibit unusual properties, some of which can be special. Understanding such new properties is important for developing new materials for desired industrial uses and also for understanding the interior of Earth, where everything is hot and squeezed.

Big ice may explain Mars’ double-layer craters

August 5, 2013 10:08 am | News | Comments

Brown Univ. planetary geologists have an explanation for the formation of more than 600 “double-layer ejecta” (DLE) craters on Mars. The Martian surface was covered with a thick sheet of ice at impact. Ejected material would later slide down steep crater sides and across the ice, forming a second layer.

Scientists look into Earth’s “Deep Time” to predict climate change effects

August 1, 2013 4:15 pm | News | Comments

Climate change alters the way in which species interact with one another—a reality that applies not just to today or to the future, but also to the past, according to a recent study which analyzed information about past episodes of rapid climate change from Earth's history. The researchers hope to use this finding to help predict future changes to our planet's ecosystems.

Geoscientists decipher nature's playbook, discover new mineral-making secrets

August 1, 2013 1:50 pm | News | Comments

Sugars are important sources of energy for all organisms. Virginia Tech researchers have discovered that certain types of sugars, known as polysaccharides, may also control the timing and placement of minerals that animals use to produce hard structures such as shells and exoskeletons of mollusks, lobsters, and shrimp.

Biggest extinction in history caused by climate-changing meteor

August 1, 2013 10:31 am | News | Comments

It's well known that the dinosaurs were wiped out 66 million years ago when a meteor hit what is now southern Mexico; but evidence is accumulating that the biggest extinction of all, 252.3 million years ago, at the end of the Permian period, was also triggered by an impact that changed the climate.

Simulations aiding study of earthquake dampers for structures

July 31, 2013 9:06 am | News | Comments

Researchers have demonstrated the reliability and efficiency of "real-time hybrid simulation" for testing a type of powerful damping system that might be installed in buildings and bridges to reduce structural damage and injuries during earthquakes. The magnetorheological-fluid dampers are shock-absorbing devices containing a liquid that becomes far more viscous when a magnetic field is applied.

Study: Online tools accelerating earthquake-engineering progress

July 30, 2013 12:11 pm | by Emil Venere, Purdue Univ. | News | Comments

The George E. Brown Jr. Network for Earthquake Engineering Simulation (NEES), based at Purdue Univ., includes 14 laboratories for earthquake engineering and tsunami research, tied together to provide information technology for the network. A new study has found that online tools, access to experimental data and other services provided through this "cyberinfrastructure" are helping to accelerate progress in earthquake science.

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