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

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

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 ...