HOME >> BIOLOGY >> NEWS
International scientists probe unsolved puzzles of the Earth and beyond at "Earth System Processes"

ddress the geological debate about whether or not the early Earth behaved the same way as at present, with plate tectonics. Using evidence from Venus, Ghail will explain that the early Earth did not have modern plate tectonics, but did have something that looked similar to it, which explains the confusing evidence from the geological record. He will further argue that since this situation is unstable on Venus today (i.e., every so often Venus undergoes a cataclysmic resurfacing), early Earth did the same.

Grant M. Young, Department of Earth Sciences at the University of Western Ontario, explores the role of plate tectonics in bringing about dramatic climate oscillations, changes in the atmosphere and hydrosphere, and setting the stage for the "explosive" evolution of life in the Cambrian. The Proterozoic eon began and ended with unbelievable climatic changes--ancient sedimentary rocks bear silent testimony to severe glaciations on every continent. The cause of these glaciations remains one of the great unanswered questions of science, but one possibility is that they were induced by plate tectonic processes. Following continental collisions, enhanced physical and chemical breakdown of minerals from resulting mountainous land-masses would have resulted in removal of CO2 from the atmosphere, and climatic cooling. The glaciations appear to be interspersed with warm climatic episodes, when atmospheric CO2 (from volcanic eruptions) built up again because during glaciations, weathering processes are inhibited.

James C. Zachos, of the Earth Sciences Department at UCLA, notes that the current warming of global climate may not be unprecedented in terms of rate and magnitude. Some 55 mya, Earth's atmosphere and oceans warmed by more than 6C in a period of less than 20 kyrs. Geochemical evidence suggests that the warming was caused by the release of a massive quantity of methane from the destabilization of marine clathrates (frozen water and methane) in several short
'"/>

Contact: Ann Cairns
acairns@geosociety.org
303-447-2020 x 1156
Geological Society of America
24-May-2001


Page: 1 2 3 4 5 6 7 8 9

Related biology news :

1. International study findings link acne-like rash to effectiveness of new targeted cancer treatment
2. USAID, Conservation International & Starbucks launch Conservation Coffee Alliance in Central America
3. ConocoPhillips & Conservation International launch Biodiversity Action Plan in Venezuela
4. A room with a view for the International Space Station: Completion of the cupola observation module
5. International symposium on nutritional genomics
6. First International Scientific Conference on Childhood Leukaemia
7. 1st International Conference on Cell Therapy for Cardiovascular Disease
8. International research conferences at the Villa Vigoni
9. Conservation International & SC Johnson invest in Ecuadors rainforest to offset climate impacts
10. STN International launches Derwent World Patents Index First View
11. Media invited to attend International Society For Heart & Lung Transplantation meeting April 21-24

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/22/2016)... , June 22, 2016  The American College of Medical ... Show Executive Magazine as one of the fastest-growing trade ... 25-27 at the Bellagio in Las Vegas ... highest percentage of growth in each of the following categories: ... companies and number of attendees. The 2015 ACMG Annual Meeting ...
(Date:6/22/2016)... , June 22, 2016   ... management and verification solutions, has partnered with ... software solutions for Visitor Management, Self-Service Kiosks ... provides products that add functional enhancements to ... provides corporations and venues with an automated ...
(Date:6/22/2016)... On Monday, the Department of Homeland Security ... solutions for the Biometric Exit Program. The Request for ... (CBP), explains that CBP intends to add biometrics to ... United States , in order to deter visa ... Logo - http://photos.prnewswire.com/prnh/20160622/382209LOGO ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... ... June 27, 2016 , ... ... on what they believe could be a new and helpful biomarker for malignant ... Click here to read it now. , Biomarkers are components in ...
(Date:6/27/2016)... ... 2016 , ... Parallel 6 , the leading software as a service ... Virtual Patient Encounter CONSULT module which enables both audio and video telemedicine communication ... , Using the CONSULT module, patients and physicians can schedule a face to face ...
(Date:6/27/2016)... ... June 27, 2016 , ... Newly created ... services and solutions to the healthcare market. The company's primary focus is on ... sales and marketing strategies that are necessary to help companies efficiently bring their ...
(Date:6/27/2016)... Hill, N.C. (PRWEB) , ... June 27, 2016 ... ... U.S. commercial operations for Amgen, will join the faculty of the University ... serve as adjunct professor of strategy and entrepreneurship at UNC Kenan-Flagler, with a ...
Breaking Biology Technology:
Cached News: