Thesiss

The arc exhumation hypothesis states that new basalt-rich sources lifted during arc-continent collisions cause atmospheric PCO\sb2 drawdown and global cooling. Drawdown lags the early release of CO\sb2 and ¹⁸⁷Os from uplifted continental margin sediments. It generally precedes r…

The late Pliocene and Pleistocene epochs have been characterized by a series of climate cycles generally referred to as ice ages. The ice ages not only involved high latitude climate oscillations as this designation implies, but also variability in low latitude tropical climate.…