A display in the super-scenic canyon northeast of Tucson says the granite rocks were "squeezed together and stretched like warm taffy 25 million years ago." The resulting gneiss - pronounced "nice ...

Geologists recently dated the age of Watersmeet gneiss, a type of rock in the Upper Peninsula, as the oldest in the U.S. Here ...

It is known for its beauty as an ornamental stone in buildings and monuments. The rock known as Morton gneiss started out as a gray granite, formed about 3.5 billion years ago deep beneath the ...

The mystery of Stonehenge's central stone unearthed A geochemical analysis of the Altar Stone, a partially buried slab of sandstone ... to be made of Lewisian gneiss from the Hebrides” islands ...

The Gneiss stone had been chosen so that the natural ... "We know that the buildings in the complex were roofed by stone slabs so this axe was perhaps used to cut and fashion the timber joists ...