Avachinsky volcano, Kamchatka (IMAGE) University of Southampton Caption The team recognised changes in the composition of rocks formed by melting of Earth's interior at subduction zones where major tectonic plates collide. The present-day subduction volcano shown here is Avachinsky, Kamchatka. Photograph: Dr Tom Gernon / University of Southampton [@TMGernon]. Credit Photograph: Dr Tom Gernon / University of Southampton [@TMGernon]. Usage Restrictions Photograph: Dr Tom Gernon / University of Southampton [@TMGernon]. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.