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
Hot Rocks 1964–1971 Hot Rocks 1964–1971 Hot Rocks 1964–1971 is a compilation album by the Rolling Stones released by London Records in December 1971. It became the Rolling Stones' best-selling release of their career and an enduring and popular retrospective. While the album carries most of the band's biggest hits during their first decade, it does drop a few of them to include standout album tracks such as "Play With Fire", "Under My Thumb" and "Gimme Shelter" giving listeners a more well-rounded impression of the Rolling Stones' music in this era. "Hot Rocks 1964–1971" peaked at No. 4 on the Billboard 200 album