Explains the law of superposition and the principle of original horizontality. Uses an animation to explain how rock layers can accumulate over time.
Evidence that Barringer Crater was formed by a meteorite impact includes high pressure minerals, overturned sedimentary rock layers, rock debris and fragments of the meteorite.
Nicholas Steno made many contributions to natural science, particularly to stratigraphy and to the idea of uniformitarianism.
Stratigraphers study sedimentary rock strata to decipher the geological history of a region or to look for natural resources.