abkhazia advection aegean aegean sea african agigea ahtopol albena albian algae alupka alushta ammonia anapa anatolia anatolian ancient rome ancomah anoxic event anoxic sea water argonauts asia atlantic ocean avars balchik batumi black sea forum for partnership and dialogue black sea games black sea deluge theory bosporus bulgaria bulgarian black sea coast bulgarian language bulgars burgas calcium carbonate carians caspian sea caucasus colchis cold war columbia university community of democratic choice crimea crimean war danube dardanelles de facto diatom dniester eforie endemic eupatoria euphemism eurasia eurasian europe euryhaline extremophile feodosiya fluvial folk etymology guam organization for democracy and economic development gagra gelendzhik genovese geographic coordinate system georgian language giresun golden sands gonio goths greek language greigite gurzuf halocline herodotus hittites huns hydrogen sulfide indo-european languages international space station isopycnal istanbul ivan aivazovsky kavarna kerch kherson kobuleti koktebel kurgan lake lapsi laz language list of countries littoral zone mamaia mangalia mediterranean sea meromictic nasa neal ascherson nesebar new scientist nitrate novorossiysk obzor odessa ordu orogeny oxygen phytoplankton pindar pitsunda pomorie pontic poti precipitation primorsko proto-indo-european language pycnocline pyrite radiocarbon dating red sea redox resort rize robert ballard romania romanian language russia russian language russians saline salinity samsun sapropel scythians sea sea of azov sea of marmara sevastopol sochi sozopol stenohaline strabo strait strait of kerch subduction subsidence sudak sukhumi sulfate sulfide sulina sunny beach sveti vlas tatars tethys thermocline thracians topography tourism trabzon tuapse turkey turkish straits turkish language ubykh language ukraine ukrainian language urheimat vama veche varangians varna volcanic arc water water balance wikimedia commons yalta yard zonguldak