Extinction of giant mammals altered landscape Nov 20, 2009
What killed these large beasts in a relative instant of geologic time. A question asked less often: What happened when they disappeared. (MSNBC -- Environment)
Earthquakes Actually Aftershocks Of 19th Century Quakes; Repercussions Of 1811 And 1812 New Madrid Quakes Continue To Be Felt Nov 6, 2009
The difference, Stein explains, is that the two sides of the San Andreas fault move past each other at a speed of about one and a half inches in a year -- which is fast on a geologic time scale. This motion "reloads" the fault by swamping the small changes caused by the last big earthquake, so aftershocks are suppressed after about 10 years. (Science Daily)
Arctic Lake Sediments Show Warming, Unique Ecological Changes In Recent Decades Oct 28, 2009
27, 2009) An analysis of sediment cores indicates that biological and chemical changes occurring at a remote Arctic lake are unprecedented over the past 200,000 years and likely are the result of human-caused climate change, according to a new study led by the University of Colorado at Boulder. While environmental changes at the lake over the past millennia have been shown to be tightly linked with natural causes of climate change -- like periodic, well-understood wobbles in Earth's orbit --... (Science Daily)
20th Century Warming Unlike Natural Variation Oct 25, 2009
25, 2009) The possibility that climate change might simply be a natural variation like others that have occurred throughout geologic time is dimming, according to evidence in a Proceedings of the National Academy of Sciences paper published October 19. See also. (Science Daily)
Tsunami evacuation buildings: another way to save lives in the Pacific Northwest Oct 20, 2009
The region's geology makes an earthquake-triggered tsunami inevitable and imminent in geologic time, Wang says, yet coastal towns and cities in the northwest are woefully unprepared for such a large-scale natural disaster. In response, she is working with public officials and stakeholders to develop a series of tsunami evacuation buildings up and down the northwest coast. (EurekAlert!)
Just How Sensitive Is Earth's Climate to Atmospheric Carbon Dioxide? Oct 9, 2009
Two new studies look far back in geologic time to determine how sensitive the global climate is to atmospheric CO2 levels ... Thus reassured of the technique's accuracy, they plunged back into deep geologic time. (Scientific American)
October 2009 Geology and GSA Today highlights Oct 2, 2009
The excellent fossil record of single-celled, bottom-dwelling organisms called foraminifera enabled Buzas and Culver to pinpoint the geologic time and geographic origin of 259 species currently residing off the Atlantic seaboard. The results indicate that modern distributions are assembled from a mixture of species originating in more than one geographic region. (EurekAlert!)
Grappling with the Anthropocene: Scientists Identify Safe Limits for Human Impacts on Planet Sep 24, 2009
The scale of mankind's impact on the globe is becoming more and more apparent: We have achieved a to rival great extinction events of all geologic time as well as a rapidly acidifying ocean, dwindling ice caps, and even , a new study from scientists at the University of Colorado at Boulder reveals. No wonder then that some geologists and other scientists have dubbed the modern epoch the Anthropocene. (Scientific American)
'Rosetta Stone' Of Supervolcanoes Discovered In Italian Alps Sep 22, 2009
Sesia Valley's caldera erupted during the "Permian" geologic time period, say the discovery scientists. It is more than 13 kilometers in diameter. (Science Daily)
• 'Skin of Our Teeth' kicks off a season of optimism at Perseverance Theatre Sep 10, 2009
"The play takes place in geologic time. It's easier to be aware of that span of time in Alaska than in New Jersey (where the play takes place).". As a play within a play, "The Skin of Our Teeth," also explores the difficulties of putting a show up, which can be seen as a metaphor for the difficulty of living, Rotch said, adding, "It takes a lot of optimism to try to put on a play.". (Juneau Empire)
Escaping the nutball disease, briefly Sep 5, 2009
Instead, we were walking in deep, geologic time, where the rock walls that soared nearby were tens of millions of years old. Imagine for a moment, I said. (Buffalo Business First, NY)
After eruption life inching its way back to Kasatochi Aug 30, 2009
On that reddish rock surface, he saw a dwarf spider and a stone centipede, two tiny creatures that somehow escaped oblivion as the island reset itself in geologic time. So it appears Kasatochi was not self-sterilized during a few August days in 2008. (Anchorage Daily News)
Facts of the Matter Aug 8, 2009
Water moves downstream despite the turbulent eddies, and on our time scale the river's path is fixed, but over geologic time the river may change its course dramatically ... Water moves downstream despite the turbulent eddies, and on our time scale the river's path is fixed, but over geologic time the river may change its course dramatically. (Honolulu Star-Bulletin)
The Precambrian Supereon Aug 3, 2009
The Longest Geologic Time Division. To understand how geologists determine a rock's age and origin, we must first understand the geologic time scale. (Suite101.com)
Plants Save The Earth From An Icy Doom Jul 2, 2009
Over geologic time, large volumes of carbon dioxide have been released into the atmosphere by volcanoes. This would cause CO2 to build up in the atmosphere were it not for countervailing geologic processes of sedimentation, which bury carbon-containing minerals in the crust, sequestering it from the atmosphere. (Science Daily)
Scientists return from expedition to drill beneath frozen Russian lake May 29, 2009
This geologic time interval is fascinating, says Brigham-Grette, as a possible analog for future climate. Initial results from the drilling are still limited. (EurekAlert! -- Business News)
'PAINT ALL ROOFS WHITE TO STOP GLOBAL WARMING'... May 28, 2009
" hahahaahaha Bubba Joe Johnson on May 28, 2009 at 06:07 AM OK folks once we paint are roofs and all that heat is reflecting back up into the atmosphere with more heat so how is that cooling the planet. Charles Evans Thompson on May 28, 2009 at 12:09 AM Everyone in the world must wear a hat. It is a fact that 90% of your body heat escapes from your head. so, if you wear a hat 6 billion people keep from heating the climate. At the same time keeping this heat in saves on energy usage in the home.... (The Drudge Report)
Our Planet's Leaky Atmosphere May 12, 2009
The loss rate is currently tiny, only about three kilograms of hydrogen and 50 grams of helium (the two lightest gases) per second, but even that trickle can be significant over geologic time, and the rate was probably once much higher. As Benjamin Franklin wrote, A small leak can sink a great ship. (Scientific American)
Maybe an Asteroid Didn't Kill the Dinosaurs May 5, 2009
" Keller's and Addate's species samplings are not, of course, conclusive, and plenty of other surveys since 1978 do tie the extinctions closely to the asteroid. But since the new digs were so close to ground zero, the immediate species loss ought to be have been if anything greater there than anywhere else in the world. Instead, the animals seemed to escape unharmed. Other paleontologists, however, believe that the very proximity of El Pe;;n to the impact site makes the results even less... (Time.com)
Sea-floor sediments illuminate 53 million years of climate history May 2, 2009
"We can use the microfossils and layers of this sediment 'archive' as a yardstick for measuring geologic time," said Expedition 320 co-chief scientist Hiroshi Nishi. "This will allow us to determine the rates of environmental change, such as the rapid first expansion of large ice-sheets in the Antarctic 33.8 million years ago. This polar process had a profound impact on phytoplankton even at the equator. "We managed to retrieve several records of this important climate transition. (EurekAlert! -- Business News)
The Ranch: Timeless, changing Apr 10, 2009
And of course, geologic time has seen vast changes in the land. I do not know how far back native people have roamed or lived in the park land area. (Alpine Avalanche, TX)
Arts foundation bringing science exhibit to Butte Mar 28, 2009
Crawford said it brings home geologic time in a way children can understand. "A child can see weather erosion, wind erosion happening in hyper speed," she said. (Montana Standard, MT)
Porterville College hosts legend in anthropology Mar 21, 2009
With as many as 10 new species that lie within the geologic time frame between Lucy s time and modern time, the tree has become bushier, however, he said, her species remains at the starting point. According to newer discoveries, Lucy was determined to be an adult, a vegetarian and a forest-dwelling creature, he said. (Porterville Recorder, CA)
8 Favorite S.F. Parks Mar 8, 2009
But follow trails into the long strip of green - a boisterous picnic ground from 1907 until 1922 - and the houses on the ridges above you blur into another layer of geologic time. Mission Creek. (San Francisco Chronicle -- Travel)
