Hot dry rock geothermal energy makes use of hot fluids found naturally in basement rock; but such HWR conditions are rare. By far the bulk of the world’s geothermal resource base (over 98%) is in the form of basement rock that is hot but dry—with no naturally available water. This means that HDR technology is applicable almost everywhere on earth (hence the claim that HDR geothermal energy is ubiquitous). Typically, the temperature in those vast regions of the accessible crystalline basement rock increases with depth. This geothermal gradient, which is the principal HDR resource variable, ranges from less than 20 °C/km to over 60 °C/km,
Hot Rocks 1964–1971 works. Except for "Satanic Majesties", which isn't represented here, all of their '60s studio albums are musts." In August 2002, "Hot Rocks 1964–1971" was reissued in a new remastered CD and SACD digipak by ABKCO Records. All songs by Mick Jagger and Keith Richards, except where noted. All tracks on sides one and two were produced by Andrew Loog Oldham. All tracks on sides three and four were produced by Jimmy Miller, except "Midnight Rambler," which was produced by The Rolling Stones and Glyn Johns. Hot Rocks 1964–1971 Hot Rocks 1964–1971 is a compilation album by the Rolling Stones released