Ammonite jaws provide a window into ancient climate

By Sarah Zielinski, 21:17 PM February 6, 2014

When I was searching for ammonite fossils last year, I tended to concentrate on searching out the distinctive coiled shapes that were the shells of these once-abundant marine invertebrates. Other parts of the animal that lived inside that shell could be fossilized as well, but most of us would never notice such small bits. One of those tiny parts sometimes found in ammonite fossils is the animal’s jaw. These jaws have now given scientists a peek into the temperature conditions of Cretaceous N...

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