Cinder Cone on Mount Lassen (IMAGE) University of Oregon Caption A snowy cinder cone on Mount Lassen in Northern California, where University of Oregon researchers collected samples for their study on magma formation. They determined that the water cycle plays a key role in explosive volcanoes in the Cascade Range. Credit Photo by Marli Miller, University of Oregon Usage Restrictions Photo credit required. License Licensed 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.