Message #14399

[Rebecca]

Hydrothermal Metamorphism:
>>>Low Temp./Low Pressure
>>>Typical Rocks: pegamatites, serpentinite, soapstone

     Hydrothermal metamorphism occurs when hot, chemically active, mineral laden waters interact with a surrounding preexisting rock (called the country rock). Most hydrothermal metamorphism takes place at low pressures and relatively low temperature, as the phase diagram shows. It is one of the most pervasive and widespread types of metamorphism, although most of it cannot be seen easily. There are also several distinctly differnt types of hydrothermal metamorphism.