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Sea of Marmara

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The Sea of Marmara is a small and busy inland sea.

2010 satellite picture of the Sea of Marmara
2010 satellite picture of the Sea of Marmara

It sits entirely within the borders of Turkey. This sea acts like a bridge between two other large bodies of water. It connects the Black Sea to the Aegean Sea. It does this through two narrow paths called straits. These are the Bosporus and the Dardanelles. The sea also separates the European and Asian sides of Turkey. Some people call it the Propontis. This was the name used by the Ancient Greeks.

Gulf of Izmit, Turkey
Gulf of Izmit, Turkey

The water in the sea has a special way it works. The surface water is not very salty. Its salinity is about 22 parts per thousand. This is a little more salty than the Black Sea. However, it is only two-thirds as salty as most oceans. The water at the very bottom is different. It is much more saline there. It averages around 38 parts per thousand. This is similar to the salt levels in the Mediterranean Sea. Rivers like the Biga and Gönen flow into the sea. These rivers help to reduce the saltiness of the water.

History and myths are tied to these waters. In ancient times, Greeks called it the Propontis. This name meant "in front of" the Black Sea. They used it because they sailed through it to reach that sea. Greek myths tell of a big storm on these waters. This storm brought the Argonauts back to an island. This event led to a battle between famous heroes. The sea is also named after Marmara Island. This large island sits on the south side of the sea. It is famous because it is rich in marble.

Blooms in the Sea of Marmara (18162220028)
Blooms in the Sea of Marmara (18162220028)

There are many islands to explore in the sea. In the north, you can find the Princes' Islands. This group includes inhabited places like Büyükada and Heybeliada. People can reach these islands by ferry from Istanbul. In the south, there is another group called the Marmara Islands. This group includes the large Marmara Island and Avşa. Some islands in this group are inhabited, while others are not. Many people visit these islands for holidays in the summer. The sea is also a home for many people. About one-third of Turkey's population lives near this water.

The sea faces some very hard jobs today. A fault line called the North Anatolian Fault runs under the water. This can cause big earthquakes. In 1999, the Izmit and Düzce earthquakes happened. A large earthquake in August 1999 is called the Marmara Earthquake. Pollution is another big problem for the sea. Many cities like Istanbul are right on the coast. Rapid growth and waste have put pressure on the water. In 2021, a thick and sticky substance called mucilage appeared. It lasted for six months and made it hard for fish to live.

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🖼️ Images & Media (3)
File:2010_satellite_picture_of_the_Sea_of_Marmara.jpg
2010_satellite_picture_of_the_Sea_of_Marmara.jpg
File:Blooms in the Sea of Marmara (18162220028).jpg
Blooms in the Sea of Marmara (18162220028).jpg
File:Gulf of Izmit, Turkey.JPG
Gulf of Izmit, Turkey.JPG
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