Geothermal Geology: Understanding high temperature geologic formation; rock deformation, hydraulic fracturing/natural fractures; geothermal gradients etc. Description of a comprehensive range of Geothermal Play Types in terms of generic conceptual models of geological and tectonic settings in which geothermal systems might naturally develop or be engineered around the world. Terminology and definitions for a classification framework for Geothermal Potential (resource/reserve). Surface Geothermal Exploration: Fundamental concepts of geothermal resources exploration; remote sensing, geochemical methods. Geothermal resources exploration: geophysical methods (seismic, magnetics, magneto-tellurics, TEM, geo-electrics gravity), acquisition of existing surface/sub-surface data.