Rhyolite Point

In strict geological terms, rhyolite is a light-coloured, fine-grained volcanic rock. It is the chemical twin to granite, but instead of cooling slowly underground, it forms when sticky, silica-rich lava erupts violently from a volcano and cools rapidly on the Earth's surface.Because it is highly related to volcanic eruptions that often bury prehistoric landscapes, rockhounds frequently look for petrified wood embedded near rhyolite and volcanic ash layers.