December Geology and GSA Today highlights
...mate model, is evaluated by reference to available geological evidence. Europe and the Mediterranean ca. 3 Ma can be described as both seasonally and annually warmer and wetter than present. The cause for these changes relate to reduced land and sea ice cover in the Northern Hemisphere, which in turn affected...Researchers expand dating of marine animals to brachiopods
... things. Monica Carroll, a master's student in geological sciences at Virginia Tech, and colleagues at Virginia Tech and other universities have fit one more piece into the puzzle. They have expanded the dating of marine animals beyond mollusks to brachiopods, and the method has been shown to work back to t......ighly interdisciplinary," says Michal Kowalewski , geological scientist at Virginia Tech. "We used a variety of tools to combine paleontological, biological, geochemical, and satellite image data. It was exciting to find out that we can use fossils to address environmental issues that have direct societal relev...... exposed to wood dust occupationally. Talc in some geological settings contains asbestiform fibers, and workers exposed in some talc mining and milling operations have shown increases in tumors typically associated with exposure to asbestos. This talc, containing the asbestiform fibers, has been proposed for l...Huge new hydrothermal vent system found on seafloor
...y Field was discovered unexpectedly while studying geological and hydrothermal processes that built an unusually tall, 12,000-foot-mountain at this site. In this area, deep mantle rocks called serpentinized peridotites, and rocks crystallized in subseafloor magma chambers, have been uplifted several miles from ...Changes in Australian ecosystems tied to arrival of exotic animals
...diet, said Miller, also a professor in CU-Boulders geological sciences department. High proportions of the "heavy carbon," or carbon 13, in the eggshells indicate the emus were eating primarily grasses, while lower proportions of carbon 13 indicate their primary diet was bushes and trees. To evaluate change......he previous five mass extinction events in Earth's geological history". According to the scientists participating in the IBOY, a third or more of all species could be on a path to extinction within the next few decades. Jeffrey McNeely, Chief Scientist at the World Conservation Union and also a member of the...Earlier water on Earth? Oldest rock suggests hospitable young planet
...f zircon, a mineral commonly used to determine the geological age of rocks, scientists from the University of Wisconsin-Madison, Colgate University, Curtin University in Australia and the University of Edinburgh in Scotland have found evidence that 4.4 billion years ago, temperatures had cooled to the 100-degre...Oldest crystal reveals early Earth
...f zircon, a mineral commonly used to determine the geological age of rocks, scientists from the University of Wisconsin-Madison, Curtin University in Australia and the University of Edinburgh in Scotland have found evidence that 4.4 billion years ago, a mere 100 million years or so after the accretion of the Ea...ST@T SHEET: A monthly update on science/technology @ Temple University
...onalized experience of this natural biological and geological habitat. After a series of intensive lectures at Temple's Main Campus in Philadelphia, the students embarked on a seven-day field trip to the largest, unspoiled coral reef complex in the Western Hemisphere: the Great Barrier Reef of Belize, Jan. 3-9...February media highlights: Geology and GSA today
...thquakes at the beginning of the last century, and geological evidence suggests that earthquakes frequently occurred throughout the last couple of thousand years. For the purpose of seismic hazard assessment it is important to understand the mechanisms that are responsible for triggering these earthquakes. Howe...Lake Titicaca study sheds new light on global climate change
...y in the journal Science. The report - based on geological evidence from one of South America`s largest lakes...d aridity? For an answer, the authors turned to geological climate studies of the Atlantic Ocean. It turns out that, since the last Ice Age, the North Atlantic...Pollen record from Chilean lakes indicates global "togetherness" during last ice age
...tive data set with over 500 radiocarbon dates from geological and biological samples taken from the Lake District of Chile. In the present study, Moreno tracked the expansion and contraction of forests of the cold-resistant tree types Nothofagus and Podocarpus nubigena. The researchers chose the Lake District o......he previous five mass extinction events in Earth's geological history." According to scientists participating in the IBOY one-third or more of all species could be on a path to extinction within the next few decades. Wall emphasizes how little is known about global biodiversity. "Scientists have described ...Coping with natural disasters along the Pacific Rim
...m on the social, economic and political impacts of geological and climatic catastrophes in the Pacific Rim - a vast region that includes the Pacific coasts of Australia, Asia and the Americas - during the annual meeting of the American Association for the Advancement of Science (AAAS) in San Francisco Feb. 17. ......good reason to expect these rules extend into deep geological (evolutionary) time. … [This] provides a potentially powerful tool for predicting many important properties for past as well as present day organisms and the communities in which they live," the researchers say in their report." Says Niklas, "O...Controlling greenhouse gas carbon dioxide through carbon sequestration two-day symposium, April 2-3
...s. This could be accomplished by mimicking natural geological and biological processes, according to David Beecy... ores and carbon dioxide to mimic, in the lab, the geological process in nature that creates magnesium carbonate. They now have the reaction rate time down to one...When Shewanella meets goethite: Evidence found of recognition between animate and inanimate objects
...researchers Susan Eriksson, associate professor of geological sciences; Maddy Schreiber, assistant professor of hydrology, and Chris Tadanier, research scientist with the microbe-mineral group. In addition to microbe-mineral interactions, the group is studying protein folding and biofilms. "We will continue...International scientists probe unsolved puzzles of the Earth and beyond at "Earth System Processes"
...ces, Penn State University, challenges the popular geological theory that oxygen didnt reach present levels unti...y School of the Imperial College, will address the geological debate about whether or not the early Earth behaved the same way as at present, with plate tectonics...New satellite study shows vegetation increases in North America
... a research associate in CU-Boulders department of geological sciences. A 1995 study led by CU-Boulder indicate...of a new study on the subject by Hicke, CU-Boulder geological sciences department Assistant Professor Greg Asner and the California Institute of Technologys James...