Roberta Rudnick on the Continental Crustal Composition Paradox
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Podcast Illustrations
Images courtesy of Roberta Rudnick unless otherwise noted.
Studying the Lower Continental Crust
Xenoliths
Xenoliths are rocks that have been brought up from the lower crust or the mantle as fragments in explosively erupting volcanoes or in the deep volcanic pipes called kimberlites, which also contain diamonds.