Salt is also less dense than sandstone, so it could have created ... But the discovery of the shocked quartz crystals is the last published investigation into the origins of Upheaval Dome.

Crystalline silica can cause a range of deadly ... It's a potentially deadly dust that is thick within the sandstone which lies underneath Sydney. For the better part of the last decade, massive ...

During the recent cold front that swept through Central China, a snowstorm transformed the Wulingyuan Scenic Area in Zhangjiajie, Hunan province, into a winter wonderland, creating breathtaking scenes ...