Hydraulic Gradient

Interlayered Clay A mixture of different clays such as illite, chlorite, and montmorillonite that are structurally interlayered and form via rock alteration at moderate temperatures in shallow zones that overlie producing geothermal reservoirs.

Lava Flow A product of an erupting volcanic cone or fissure made up of liquid molten rock that flows downhill and eventually solidifies due to cooling.

Liquid-Dominated Reservoir Typical of the large proportion of conventional geothermal resources in which wells are self-flowing or pumped depending on reservoir temperature. Self-flowing wells produce a mixture of steam and hot water from reservoirs that are close to...