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
Seeds from the Underground Seeds from the Underground Seeds from the Underground is a studio album by Kenny Garrett. It was released on April 10, 2012, on Mack Avenue Records and received two Grammy nominations in Best Jazz Instrumental Album and Best Improvised Jazz Solo categories, as well as a NAACP Image Award nomination in Outstanding Jazz Album category, a Soul Train Award nomination in Best Traditional Jazz Artist/Group category, a Jazz Awards nomination for Alto Saxophonist of the Year and an Echo Award win in the Saxophonist of the Year category. The album received a 77/100 score on Metacritic, based on four reviews