Earthquakes occur along fault lines between continental plates, where one plate is diving beneath another. Pressure builds between each plate, called fault stress. When this stress builds enough to ...

The landforms indicated with arrows correspond to old magmatic intrusive rocks that may have been ancient volcanoes in the northern Andes ~10-20 million years ago. A new study published in Earth and ...

Marcia Bjornerud loves rocks. Not just under a petrographic microscope, but as animated entities with properties and personalities born from their long, eventful lives. “I’ve reached a point in my ...