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
Orient Hotel, The Rocks single storey shop, which were the first stage of what evolved over the nineteenth century into the Orient Hotel. The residence was one of the most valuable on George Street North on its completion and fitted, according to the council assessor, with every convenience on its first entry in the rate book for Gipps Ward in 1845. Chapman by the 1840s had arguably some standing in the local community for he was a foundation councillor of the City Corporation (Council) in its first term of 1842-1845; he represented Gipps Ward that took in The Rocks. His business was evidently quite