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Contact: Christine Buckley
University of Connecticut

Carbonate Shells of the Freshwater Gastropod Viviparus lentus

Caption: Michael Hren of the University of Connecticut and his coauthors examined these carbonate shells of the freshwater gastropod Viviparus lentus from the Hampshire Basin, United Kingdom. They used a clumped-isotope thermometer technique to determine the concentration of bonded heavy oxygen and carbon isotopes in these shells, which gives a picture of land temperatures during the Eocence-Oligocene transition, about 34 million years ago. Terrestrial temperatures were determined to be closely linked to atmospheric carbon dioxide.

Credit: Photo courtesy Michael Hren.

Usage Restrictions: Image and caption embargoed for public release 3 p.m. EDT Monday, April 22, 2013.

Related news release: Geochemical method finds links between terrestrial climate and atmospheric carbon dioxide

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