Sheeted dike sequences in ophiolites display the most complete record of this process, though an evolutionary gap exists between ancient deposits, whose mineral zonations increase through the zeolite and prehnite-pumpellyite lithofacies, and modern deposits, where it occurs exclusively in the lower greenschist facies. Skarns are formed when resurgent boiling in magma metasomatizes adjacent limestone in continental crust, 
Sheeted dike sequences in ophiolites display the most complete record of this process, though an evolutionary gap exists between ancient deposits, whose mineral zonations increase through the zeolite and prehnite-pumpellyite lithofacies, and modern deposits, where it occurs exclusively in the lower greenschist facies. Skarns are formed when resurgent boiling in magma metasomatizes adjacent limestone in continental crust, though this process most commonly affects gabbro and basalt, where mineral solutions recrystallize olivine and pyroxene into serpentine on the ocean floor. FTP, name this geologic process, the chemical alteration of pre-existing rocks by hot water.
Sheeted dike sequences in ophiolites display the most complete record of this process, though an evolutionary gap exists between ancient deposits, whose mineral zonations increase through the zeolite and prehnite-pumpellyite lithofacies, and modern deposits, where it occurs exclusively in the lower greenschist facies.
hydrothermal metamorphism (prompt on "metamorphism")