Dun Briste, Ireland. Sedimen-tary rock, laid down over Ms of years at the bottom of the sea, like a slice of layer cake: separ-ated from the mainland in 1393 as a result of high seas, Dun Briste is now 262' from the mainland. The cliffs in the area, including the stack, were formed in the Lower Carboniferous period about 350 Ma ago
Online interactive that covers how each type of rock is formed. Good for quick review. Use exit pass form and require one fact for each type of rock in order to exit room. Collect passes as they leave the room.
Disharmonic folds in gneiss. Gneiss is a common and widely distributed type of rock formed by high-grade regional metamorphic processes from pre-existing formations that were originally either igneous or sedimentary rocks.