The Marble Caves sit on the shores of a turquoise glacial lake in southern Chile. Light bounces off the water onto the walls, ...

In the arid deserts of Namibia, Oman, and Saudi Arabia, researchers have uncovered an astonishing discovery: thin, orderly tubes running through marble and limestone. These structures, which have left ...

Marble is best known for what it can be made into — incredible artworks or tacky ashtrays. But before it was that prized white-grey rock, marble was something a lot more pedestrian — limestone.

Mysterious micro-burrows in desert marble and limestone were probably made by microbes that lived millions of years ago. Exactly what kind of microbes bored into the rock remains unknown, as does ...

Mysterious micro-burrows in desert marble and limestone were probably made by microbes that lived millions of years ago. Exactly what kind of microbes bored into the rock remains unknown, as does ...

The soft rocks such as limestone, shale, marble and sandstone underlie the valleys. Based on our landscape, elevation, vegetation and drainage, we can divide York County into physiographic provinces.

Gravestones can be made from plutonic rocks, like gabbro and granite, metamorphic rocks, like slate and marble, and more rarely of sedimentary rocks, likes sandstone and limestone. The choice ...