▁c aves ▁along ▁the ▁south ▁coast ▁of ▁Great ▁Sal te e ▁and ▁the ▁entire ▁area ▁as ▁a ▁grey ▁se al ▁habitat ▁with ▁specific ▁reference ▁to ▁both ▁islands ▁as ▁important ▁sites , ▁including ▁for ▁bre eding , ▁along ▁with ▁some ▁areas ▁further ▁out ▁also ▁of ▁interest ▁as ▁mou lt ▁and ▁rest ing ▁ha ul - out ▁sites . ▁ ▁Ge ology ▁and ▁ge ography ▁The ▁islands ▁are ▁based ▁on ▁Pre - C amb rian ▁bed rock ▁between ▁ 6 0 0 ▁million ▁and ▁ 2 ▁billion ▁years ▁old . ▁The ▁highest ▁point ▁in ▁the ▁Sal te es ▁is ▁South ▁Sum mit ▁on ▁Great ▁Sal te e ▁at ▁ 1 9 8 ▁feet ▁( 6 0 ▁metres ). ▁The ▁waters ▁around ▁the ▁islands ▁can ▁be ▁tre acher ous , ▁hence ▁the ▁area ▁is ▁known ▁as ▁the ▁" G ra vey ard ▁of ▁a ▁Th ous and ▁Sh ips ▁and ▁the ▁islands ▁their ▁tomb st ones ". ▁ ▁Dem ograph ics ▁ ▁Popular ▁culture ▁▁ ▁The ▁Sal te e ▁Islands ▁are ▁the ▁setting ▁for ▁E oin ▁Col fer ' s ▁book ▁Air man ▁as ▁a ▁powerful ▁so ver eign ▁state ▁based ▁around ▁diam ond ▁industry . ▁However , ▁the ▁book ▁is ▁a ▁work ▁of ▁fiction ▁and ▁no ▁significant ▁natural ▁resources ▁have ▁been ▁found . ▁ ▁References ▁ ▁Further ▁references ▁De ane , ▁C . D . ▁ 1 9 7 4 . ▁On ▁the ▁wild ▁island ▁kingdom ▁of ▁Great ▁Sal te e . ▁B elf ast ▁News ▁Let ter . ▁ 7 ▁December . ▁ ▁External