Hot dry rock geothermal energy as a separate state from that of the continuum of permeable rock—just as one would consider a completely closed faucet as distinct from one that is open to any degree, whether the flow be a trickle or a flood. In the same way, HDR technology should be regarded as totally distinct from EGS. A definitive book on HDR development, including a full account of the experiments at Fenton Hill, was published by Springer-Verlag in April 2012. Hot dry rock geothermal energy Hot dry rock (HDR) is an abundant source of geothermal energy available for use. A vast store of thermal
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