Did you know… Alaska uses geothermal energy to produce electricity? It might seem highly unlikely...
Vadose Zone
A hydrogeological term that represents the volume of rock and unconsolidated materials between the ground surface and the underlying water table, in which pores and cracks are filled or partially filled with air.
Geothermal Glossary
Word of the Week – Piezometric Surface
Piezometric Surface The imaginary surface to which groundwater rises under hydrostatic pressure in wells or springs.
Word of the Week – Proppant
Proppant Sand-sized solid grains that are injected in a fluid suspension and used to hold open stimulated fractures in a geothermal reservoir.
Word of the Week – Propylitic Alteration
Propylitic Alteration A term borrowed from studies of hydrothermal ore deposits that refers to an assemblage of secondary hydrothermal minerals which forms in igneous rocks. This assemblage is made up of chlorite, illite, feldspar (both Na and K-rich varieties),...