Clare Warren on Divining the History of a Rock

Most rocks were formed many millions of years ago.  Since then, some have been largely left alone, while others have been baked at high temperatures and buried at great depths.  Clare Warren explains how we can now uncover remarkably precise histories of such rocks, even if they have been through more than one episode of such extreme treatment. Clare Warren is a Senior Lecturer in the School of Environment, Earth and Ecosystem Sciences at The Open University. For more on Geology Bites, go to geologybites.com, where you can also find diagrams and pictures that support the podcast.