Sentences with phrase «composition of the zircons»
«One of the assumptions being made is that the composition of the zircons and the rocks in which they have formed give an accurate record of the magmas and conditions at which the zircons and magmas formed,» Associate Professor Bryan said.
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«Zircons crystallize out of molten rocks with special compositions, and their appearance signifies a profound change from silica - poor to silica - rich volcanism.
Working with Miller and doctoral student Abraham Padilla at Vanderbilt, Joe Wooden at Stanford University, Axel Schmitt and Rita Economos from UCLA, Ilya Bindeman at the University of Oregon and Brennan Jordan at the University of South Dakota, Carley analyzed about 1,000 zircon crystals for their age and elemental and isotopic compositions.