divariant assemblage
divariant assemblage Two or more metamorphic minerals in equilibrium over a range of pressure and temperature (see METAMORPHISM). Varying the pressure or temperature within defined limits will not initiate reactions within the equilibrium assemblage of minerals. Since two independent variables, pressure and temperature, can be changed or varied without upsetting the equilibrium, the assemblage of minerals is said to be in divariant equilibrium.
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Metastable , metastable Applied to a phase which is apparently stable but is capable of reaction if disturbed, a state usually due to the slowness of a system to… Diagenesis , diagenesis All the changes that take place in a sediment at low temperature and pressure after deposition. With increasing temperature and pressure,… Thermometer , A thermometer is a device that registers the temperature of a substance relative to some agreed upon standard. Thermometers use changes in the physic… Pressure Melting , pressure melting The melting of ice in response to stress. It comes about because the freezing temperature of water falls as pressure increases, at a… Isotherm , Isotherm
Isotherms are lines that connect points of equal temperature on weather maps, so at every point along a given isotherm the temperature value… Boiling Point , The boiling point of a liquid substance is the temperature at which the vapor pressure of the liquid equals the external pressure on the liquid. Vapo…
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divariant assemblage