It is divided into two sub-basins, the northern one with a large shelf of over 190 kilometers wide.  
Over 90% of its volume lacks oxygen, because the upper and lower layers do not intermix, making it the largest meromictic basin in the world.  It is divided into two sub-basins, the northern one with a large shelf of over 190 kilometers wide.  The southern shelf is narrow and borders upon the cities of Samsun and Sinop, to the west emptying through the Sea of (*) Marmara.  It is separated from the Sea of Azov by the Cimmerian Bosporus, and northern cities include Odessa and Rostov.  FTP, name this inland sea separating Asia from Europe.
Over 90% of its volume lacks oxygen, because the upper and lower layers do not intermix, making it the largest meromictic basin in the world.  
{Black} Sea