Hot dry rock geothermal energy Hot dry rock geothermal energy Hot dry rock (HDR) is an abundant source of geothermal energy available for use. A vast store of thermal energy is contained within hot - but essentially dry - impervious crystalline basement rocks found almost everywhere deep beneath the earth’s surface. A concept for the extraction of useful amounts of geothermal energy from HDR originated at the Los Alamos National Laboratory in 1970, and Laboratory researchers were awarded a U.S. patent covering it. Although often confused with the relatively limited hydrothermal resource already commercialized to a large extent, HDR geothermal energy is very different. Whereas
This Is What the Truth Feels Like Tour already collaborated on the singles "Let Me Blow Ya Mind" and "Rich Girl". This setlist was obtained from the July 12, 2016, concert, held at the Xfinity Center in Mansfield, Massachusetts. It does not represent all concerts for the duration of the tour. This Is What the Truth Feels Like Tour The This Is What the Truth Feels Like Tour was the third solo concert tour by American singer-songwriter Gwen Stefani, in support of her third solo studio album, "This Is What the Truth Feels Like" (2016). It began on July 12, 2016, in Mansfield, Massachusetts at the Xfinity Center