TIL that there is a 1.5km thick layer of salt deep beneath the sea floor of the Mediterranean Sea from the near complete drying up of the Mediterranean Sea 5.5 mya. Salty!
Treasure From the Sea: The Salt Flats of Messolonghi
What Did the Continents Look Like Millions of Years Ago? - The Atlantic
The Mediterranean dried up almost completely during the Messinian Salinity Crisis.
Which is saltier: the Mediterranean Sea or the Atlantic Ocean? - Quora
The Mediterranean nearly dried up. A cataclysmic flood revived it.
Mediterranean Sea, Facts, History, Islands, & Countries
OS - Coastal high-frequency radars in the Mediterranean – Part 2: Applications in support of science priorities and societal needs
Eastern Mediterranean water outflow during the Younger Dryas was twice that of the present day
Which is saltier: the Mediterranean Sea or the Atlantic Ocean? - Quora
Atlantropa: the colossal 1920s plan to dam the Mediterranean and create a supercontinent
Strait of Gibraltar: Where Atlantic Meets Mediterranean
About Ionian Sea, facts and maps - IILSS-International institute for Law of the Sea Studies