Imagine standing at the rim of a vast caldera, the earth beneath your feet formed by unimaginable forces millions of years ...

Visitors can explore some of the most distinctive rocks anywhere in California ... are excellent examples of a type of volcano called a "cinder cone." Cinder cone volcanoes tend to be steep ...

Rocks hurtled through the ash-filled ... Four types of volcanoes—shield, composite, cinder cone, and plug dome—can be found in Lassen Volcanic National Park, where they literally bubble ...

Volcanic cinders, or rocks, flew 1.3 kilometers. A large volume of volcanic ash is also floating northeast, meteorological officials said. The ash is expected to fall in Kagoshima, Kirishima and ...

There are two main types of volcano - composite and shield ... round hill known as a cinder cone. A lava tube may also form, beneath the surface of the ground, when low viscosity lava develops ...

The green sands come from olivine crystals from surrounding lava rocks in the Pu'u Mahana cinder cone of Mahana ... crushed shells, and volcanic deposits. While you’re there, head to the 65 ...

“We never expected to find delicate tissues such as feathers preserved in a volcanic rock.” Using electron microscopes and chemical tests, the researchers analysed samples of the fossil ...