Uranium thorium dating on corals Freelive voyeur camera
As tropical Pacific temperature variations have ripple effects all over the globe, as witnessed during El Nino and La Nina events, better constraints on tropical Pacific climate projections would increase the accuracy of regional climate projections in many areas of the world.
In my lab, we generate records of past tropical Pacific climate from corals, working across a broad-range of timescales that are relevant to anthropogenic climate change.
We use so-called “fossil corals”, drilled or collected from long-dead colonies scattered along beaches at our sites, to reconstruct climate of the more distant past (back 7,000 yrs so far). Thorium was discovered in 1829 by the Norwegian amateur mineralogist Morten Thrane Esmark and identified by the Swedish chemist Jöns Jacob Berzelius, who named it after Thor, the Norse god of thunder.Its first applications were developed in the late 19th century.Extensive low-lying marine deposits border the southeastern United States Atlantic Coastal Plain.Some units are fossiliferous and contain corals as isolated fragments in sediments of a detrital character.
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Thorium's radioactivity was widely acknowledged during the first decades of the 20th century.