0211-EARTH-fig-med [Volcano location could be greenhouse-icehouse key]

This diagram illustrates how fluctuations between continental-arc states and island-arc states could lead to episodic deposition and purging of carbon dioxide in Earth's continental crust. CREDIT: C. Lee/Rice University

About Jade Boyd

Jade Boyd is science editor and associate director of news and media relations in Rice University's Office of Public Affairs.