known as Golovkinsky-Walther's law, honoring also Nikolai A. Golovkinsky (1834-1897). A classic example of this law is the vertical stratigraphic succession that typifies marine transgressions and regressions. Metamorphic facies The sequence of minerals that develop during progressive metamorphism (that is, metamorphism at progressively higher temperatures and/or pressures) define a facies series. See also Lithofacies Metamorphic rock Sequence stratigraphy Stratum Notes References Metamorphic petrology Petrology Sedimentary rocks Stratigraphy