Sea of Marmara
Sea of Marmara 1-777
The Sea of Marmara (in Turkish: Marmara Denizi, also known as the Sea of Marmora, also known as the Propontis according to the context of the classics of antiquity, is an inland sea, located entirely within Turkish borders, which connects the Black Sea with the Aegean Sea and thus separates Turkey's Asian and European territories. It is connected to the Black Sea Through the Bosphorus Strait and the Aegean Sea, through the Dardanelles Strait, the Bosphorus divides Istanbul into two Asian and European sides, and the Sea of Marmara is a small sea with an area of 11,350 square kilometers (4,380 square miles) and its dimensions are 280 km x 80 km (174 mi x 50 mi). To 1,370 m (4,490 ft).
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The sea took its name from the island of Marmara, which is rich in marble sources, from the Greek word “μάρμᾰρον” (marmaron), meaning “marble.” As for the ancient Greek name for the sea, Propontis, it was derived from (pro), which means (before), and “pontos,” which means (the sea). It is derived from the fact that the Greeks sailed through it to reach the Black Sea, (Pontus). In Greek mythology, a storm on the Propontis brought Argo sailors to the island they had left, leading to a battle in which Jason or Hercules killed King Cyzicus, who mistook them for enemies of Pelasgia.

Geographical location
The average sea surface salinity is about 22 parts per thousand, which is slightly higher than the Black Sea, but only two-thirds the salinity of most oceans. Its water is saltier at the bottom, with an average salinity of about 38 parts per thousand. Mediterranean style. This is high-density salt water and, like the Black Sea water, does not move to the surface. The waters of the Susurluk, Bega (Granicus) and Gonen rivers also reduce sea salinity, although their effect is less on the Black Sea. With little land draining south into Thrace, almost all of these rivers flow from Anatolia.
The sea contains the archipelago of the Princes' Islands, Marmara Island, Afca and Paş_websitesa Limani.