Sentences with phrase «analyzed oxygen isotope ratios»
To better understand the cycle of magma production, the researchers analyzed oxygen isotope ratios in quartz and zircon, water - and heat - resistant minerals, from volcanic rocks in the Yellowstone caldera.
http://www.sciencemag.org/
When the researchers analyzed the oxygen isotope ratios over the past 8,000 years, they found that the jet stream became wavier — with colder Eastern winter weather and warmer Western winter weather — on about a 4,000 - year cycle.
Not exact matches
Back at their Georgia Tech lab, they analyzed the stalagmites for the ratio of oxygen isotopes contained in samples of calcium carbonate, the material from which the stalagmites were formed.
One group of students has been drilling modern and fossil teeth to obtain samples that will be analyzed to examine stable carbon and oxygen isotope ratios.
The scientists analyzed the ratio of the oxygen isotopes in the hydration water and in the calcium carbonate.