The Eye is made up of a mixture of sedimentary and igneous rock, and erosion across the surface shows fine-grained rhyolite ...

Earth bubbles and broils beneath an underwater peak called Axial Seamount, located 480 kilometers (300 miles) off Oregon's ...

The only exception to the rule is Country Tyrone which has a bit of everything - clay, basalt, gabbro ... Although all rocks might start out as igneous rocks, some of these rocks are then broken ...