When this pressure is released, for example as a result of plate movement, magma shoots to the surface causing a volcanic eruption. Above the ground the liquid rock is called lava and as it cools ...

Layers of volcanic rock in eastern Oregon, the Willamette Valley and the Columbia Basin have created fertile soil for farming ...

Oregon’s state geologist is pitching a novel idea of using the region’s rocky basalt layer – born of lava that flowed ...

Bringing a novel approach to a classic problem, researchers have revealed how changes in ocean chemistry over the past 2 billion years have left an imprint on volcanic rocks formed in island arcs.

U.S. Congress created the agency to “classify the public lands and examine the geological structure, mineral ... deposits and ...

Liquid-filled rocks form when minerals trap fluids, but depending on their composition they can either be classed as enhydros ...

Chemical mixtures corresponding to volcanic rocks were placed in ... After analyzing these rocks' chemical and mineral ...

At least 10 people have been killed after an enormous volcano erupted in Indonesia last night. Mount Lewotobi Laki Laki spewed thick brown ash 6,500ft into the air as hot "ash bombs" rained down ...

Rescue workers are sifting through smoldering debris and thick mud in search of survivors a day after a volcano on ...