Perlite is a volcanic rock that increases circulation and moisture ... Once the perlite is brought out of the ground it is taken to processing plants where it is crushed into small pieces.

When a large volcano erupts, as Mount Spurr appears close to doing about 80 miles from Anchorage, Alaska, it can ...

Lerma river system, the organization H2O Lerma Con Encanto is seeing results with eggshell and volcanic rock filters.

Living plants and animals take up carbon-14 along ... One of these radioisotopes is potassium-40, which is found in volcanic rock. After the volcanic rock cools off, its potassium-40 decays ...

An analysis of a 30,000-year-old fossil vulture from Central Italy has revealed for the first time that volcanic rock can preserve microscopic details in feathers -- the first ever record of such ...

Researchers found that the volcanic rock preserving the feather holds microscopic details preserved within the fossil. The team’s research—published today in Geology—found that the feathers ...