Hand-carved arrowheads and jagged spears made of obsidian, a sharp rock formed by volcanic magma, are remnants of vast ...

Along with volcanic ash, his brain and spinal cord were found to contain a mysterious archeological treasure: tiny, gleaming shards of black glass. Not till 2020, around 1,941 years after he ...

Bally’s identified the debris as non-hazardous perlite, a volcanic glass used in construction ... demolition material from entering the river. “There is no timeline for completion yet ...

"Zeolites can form as primary minerals (with pretty crystals) or can form secondarily, during the natural alteration of volcanic glass and ash." This discovery is the first time that feathers have ...

The process is called vitrification. "Obsidian glass, that is, volcanic glass, forms when lava is very quickly cooled, for example, where it enters into water," Mr Giordano added. According to ...

The tools were made from cooled-down lava called volcanic glass and were found at a workshop ... located along the upper ...

during the natural alteration of volcanic glass and ash, giving the rock a "mudrock-like" aspect." The alteration of the ash due to passage of water induced the precipitation of zeolites ...

A glass-like substance found in the skull of a person who perished in the volcanic eruption of Mount Vesuvius has helped archaeologists unravel the sequence of events that wiped out Pompeii and ...