Geologists examined crystals in rock from four massive eruptions in the Chilean Andes.
Findings on the river’s age also have implications for past landscape change in Asia.
Evidence from volcanic crystals sheds light on magma storage under Mount Agung and helps explain this giant volcano’s frequent eruptions.
The architecture of the nation’s capital reveals a secret geologic history—take a walking tour to spot the interesting fossils and minerals in the stones used to build the halls of power.
Geologists suggest that mixing of magma melt pockets could have caused the explosion a little more than 600,000 years ago.