Sentences with phrase «when rock composition»
Not exact matches
Ground - based remote sensing through ultraviolet and infrared spectroscopy is used to measure the composition of a volcanic plume, the column of hot volcanic ash, gas, and rock emitted when the volcano erupts.
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These rocks» silicon dioxide composition hints at when continental rocks began diverging in makeup from oceanic rocks due to plate tectonics.
When this superheated water rises from underground, it passes and often partially melts old lava flow deposits of rhyolite, a volcanic rock of silica - rich composition.
By the end of the 1960s, when she first developed her all - over compositions of waves, rocks, and celestial bodies, she had set aside paint in favor of graphite and charcoal.