Ocean cold as water at greater depths. Below the thermocline, water is very cold, ranging from −1 °C to 3 °C. Because this deep and cold layer contains the bulk of ocean water, the average temperature of the world ocean is 3.9 °C. If a zone undergoes dramatic changes in salinity with depth, it contains a halocline. If a zone undergoes a strong, vertical chemistry gradient with depth, it contains a chemocline. The halocline often coincides with the thermocline, and the combination produces a pronounced pycnocline. The deepest point in the ocean is the Mariana Trench, located in the Pacific Ocean
Fools Gold/What the World Is Waiting For and "What the World Is Waiting For" were recorded at Sawmills Studios in Cornwall during the late summer of 1989, with additional vocal and guitar parts recorded later at London's Battery Studios, during the autumn of 1989. The tracks had been worked on for four months, and the intention was to put "What the World Is Waiting For" as the A side; however, when Roddy Mckenna, Silvertone's A&R man, heard "Fools Gold" he urged the band to use that as the A-side. The band were not completely convinced, and it was agreed, instead, to release the two tracks as a