Volcano crystal balls Magma, the super-hot molten rock which feeds volcanic eruptions, is generated many tens of kilometers below the surface in Earth's mantle. On its journey up to the surface ...

Some of the unusual rocks carry stories about water on Mars. One has hints of long-gone microbes. All tell of a dynamic, complex planet.

clues, like a tiny crystal ball” in an article for The Conversation—they could effectively compare non-mineralized rocks in the wider Benolong Volcanic Suite to the mineralization that took ...

In the middle of the Pacific Ocean, thousands of miles from any continent, Easter Island rises out of the sea. Its surface ...

J. W. Gregory in NATURE of February 19, some interest attaches to a specimen of a volcanic rock sent to the Mineral Department of the British Museum for identification in July, 1912, by Dr.

“Zeolites are minerals rich in silicon and aluminium and are common in volcanic ... crystals) or can form secondarily, during the natural alteration of volcanic glass and ash, giving the rock ...

"Zeoloites can form as primary minerals (with pretty crystals) or can form secondarily, during the natural alteration of volcanic glass and ash, giving the rock a 'mudrock-like' aspect." ...

"Zeolites can form as primary minerals (with pretty crystals) or can form secondarily ... the way to finding other fossils hidden in volcanic rocks. "The fossil record is continually surprising ...