Blue Biggs Jasper is a silicated volcanic ash. It was formed during a volcanic eruption and is part of a Miocene series of rocks called the John Day Formation, near Biggs, Oregon, USA. It is a decorative stone used for jewellery and trinkets.
Six fossils of salamanders were found embedded in volcanic ash in an ancient lake bed in western Liaoning Province, China. Photo: Mick Ellison, American Museum of Natural History/Proceedings of the National Academy of Sciences Posted on March 2012
MAMMATUS clouds are most often associated with the anvil cloud & severe thunderstorms. They often extend from the base of a cumulonimbus but may also be found under altocumulus, altostratus, stratocumulus, & cirrus clouds as well as volcanic ash clouds^
SPILL, Daniel Beltra Images from the Deepwater Horizon Oil Spill A plume of smoke rises from a burn of collected oil. A total of 411 controlled burns were used to try rid the Gulf of the most visible surface oil from the BP Deepwater Horizon wellhead.
These pictures will make you want to visit Pompeii, which was covered under a layer of volcanic ash thousands of years ago