Hutton's Unconformity is a name given to various famous
geological sites in
Scotland identified by the 18th-century Scottish
geologist James Hutton as places where the junction between two types of rock formations can be seen. This geological phenomenon marks the location where rock formations created at different times and by different forces adjoin. For Hutton, such an
unconformity provided evidence for his
Plutonist theories of
uniformitarianism and the
age of the Earth.