Tag: "geologic" at biology news
Global warming more common than thought, deep-sea drilling off Japan now demonstrates
...r document and understand past global warming. In geologic
time, episodes of warming began almost instantaneously -- over a span of about a thousand years, Bralower said. Warming bursts may have been triggered by large volcanic eruptions or submarine landslides that released carbon dioxide and methane, both...
December Media Mighlights: GEOLOGY and GSA TODAY
...ptance of the plate tectonics theory in the 1970s, geologic
interpretation style was transformed. More and mor...ion, the authors suggest that these rocks may have geologic
affinities to the neighboring crustal rock section. Therefore, they argue that these rocks are not f...
December media highlights - GSA BULLETIN
... Desert region of southeastern Mongolia contains a geologic
record of widespread structural extension during late Mesozoic time, as well as a significant portion of Mongolia's petroleum reserves. Understanding this record is important for reconstructing the tectonic evolution of eastern Asia and for predictin...
Antarctic mud reveals ancient evidence of global climate change
...r human endeavors elsewhere on the planet. But new geologic
evidence unearthed from deep-sea mud deposits stro...to the beginning of the Holocene - the most recent geologic
epoch. "The Antarctic Peninsula is an ideal region to investigate climate change at decadal to mill...
January media highlights: GEOLOGY and GSA TODAY
...ed) for outstanding achievement in contributing to geologic
knowledge through original research that marks a major advance in the earth sciences. The award, consisting of a gold medal and a cash prize, was endowed by Dr. and Mrs. Fred A. Donath....
January media highlights-GSA Bulletin
...tectonic and structural setting of that area. Over geologic
time, changes in sea level generate patterns of deposition and erosion that are geographically unique for the time of each transgression. Such patterns fail to persist when the basal surfaces of stratigraphic units are compared sequentially over time...
February media highlights - GSA Bulletin
...terior of Asia remains one of the least understood geologic
provinces on Earth. Our expeditions have documented the geologic
history of northwest China during the Permian period, a time immediately following an episode of pla...
Centuries-old lotus seeds germinated by UCLA scientists
...blished in 1995. The lotus plant is known from the geologic
record as early as 135 million years ago, dating from a time when dinosaurs roamed the Earth, Shen-Miller said. In China, it has been grown for at least 4,000 years. Shen-Miller said she would share her remaining ancient lotus seeds with other intere...
UCLA scientists, colleagues substantiate biological origin of earliest fossils
...ent 500 million years of the planet's history. But geologic
time covers more than 4.5 billion years, and Schopf's textbooks and professors taught virtually nothing about the Earth's first four billion years. The reason this period was neglected, Schopf learned, was that nobody knew much about it. He vowed to ...
Years of research, thought lead geologist to propose new supercontinent Columbia
...will contribute to understanding it. Magnetic and geologic
evidence for supercontinents becomes less certain and more controversial as the age of the supercontinent increases, Rogers said. For that reason, the shape of Columbia and even its existence is less certain than that of Rodinia. Originally trained...
UCLA to host free symposium April 5 on extinctions in Earths history
...olution of invertebrate animals in the Phanerozoic geologic
record. Paul Wignall, School of Earth Sciences, University of Leeds, England. An expert on the origin of marine petroleum, Wignall has also focused his research on the causes of mass extinctions particularly the major event 250 million years ago t...
Impact events' kinetic energy may be key to understanding the severity of mass extinctions
...c energy released by impacts that occur during the geologic
age of the mass extinction. Lucas will present hi...ion events. The impact energy released during the geologic
ages of each extinction event is at least 10 million megatons of TNT equivalent yield per geologic
April GEOLOGY and GSA TODAY media highlights
...uvar Mountains, Arizona, were altered in different geologic
settings, yet have very similar cathodoluminescence textures and chemistry. Analogue modeling of arc and backarc deformation in the New Hebrides arc and North Fiji Basin. W.P. Schellart et al. Epsilon Laboratory, Australian Crustal Research Centre,...
Ocean ecosystems only altered following two great mass extinctions
...ed into doubt by differences in the quality of the geologic
record, the results of the work by Knoll, Sepkoski, and Bambach, published in PNAS, demonstrate that the end Permian and end Cretaceous events did affect life in general in very important ways....
New research questions evidence for earliest life on earth
... The difficulty of identifying life the earliest geologic
record also has profound implications concerning our ability to recognize life in any Martian rock samples....
Improving water use in growing corn possible, study shows
...cted during the 1998 and 1999 growing seasons in a geologic
area near Fredericksburg, Va., known as the northern coastal plain of Virginia. "Water lost to drainage and runoff is not only lost to the corn crop, but it can also decrease surface and groundwater quality by transporting nutrients and soil into the...
Dinosaur discoveries in Montana
...0 million to 50 million fossil plants, animals and geologic
specimens. Also included in the collections are more than 1,500 catalogued specimens of dinosaurs....
Science picks - leads, feeds and story seeds
... special maps of national parks and monuments, and geologic
and hydrologic maps. The new generation of maps - The National Map - will provide digital access to current, accurate, and nationally consistent data and topographic maps derived from those data. This seamless, continuously maintained set of public...
Biologists new experiment may vindicate Darwin
...nmental differences are far more common than large geologic
events such as floods or rising mountain ranges that are necessary for full geologic
isolation so this model, if it is successful, could give biologists a new tool when piecing together...
November GEOLOGY and GSA TODAY media highlights
...s must be reevaluated. Venus: Timing and rates of geologic
activity. Alexander T. Basilvesky, Vernadsky Inst...riginal chemistry has been thoroughly altered over geologic
time. From this we can draw several important conclusions. First, it verifies that organics derive...
1 2 3 4 5 6