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Encyclopedia > Mediterranean

The Mediterranean Sea is an intercontinental sea positioned between Europe to the north, Africa to the south and Asia to the east, covering an approximate area of 2.5 million kmē.

Contents

Name

The term Mediterranean derives from the Latin mediterraneus, 'inland' (medius, 'middle' + terra, 'land, earth').


The Mediterranean Sea has been known by a number of alternative names throughout human history. It was, for example, commonly called Mare Nostrum (Latin, Our Sea) by the Romans. In the Bible, it is referred to as the Great Sea or the Western Sea. In modern Hebrew, it is called הים התיכון, "the middle sea", a literal adaptation of the German equivalent Mittelmeer. In Turkish, it is Akdeniz.


Presently, "The Med" is a common English language contraction for the Mediterranean Sea and its surrounding regions when employed in informal speech.


Geography

The Mediterranean Sea is connected to the Atlantic Ocean by the Strait of Gibraltar on the west and to the Sea of Marmara and Black Sea, by the Dardanelles and the Bosporus respectively, on the east. The Sea of Marmara is often considered a part of the Mediterranean Sea, whereas the Black Sea is generally not. The man-made Suez Canal in the south-east connects the Mediterranean Sea with the Red Sea.


Tides are very limited in the Mediterreanean as a result of the narrow connection with the ocean.


The Mediterranean climate is generally one of wet winters and hot, dry summers. Special crops of the region are olives, grapes, oranges, tangerines, and cork. The region has a long history of civilization.


Large islands in the Mediterranean include:

Bordering countries

Modern states bordering the Mediterranean Sea are:

Other countries that don't border the Mediterranean, such as Portugal and parts of Bulgaria and Romania, are technically Mediterranean in their climate, fauna and flora.


Subdivisions

The Mediterranean Sea is sub-divided into a number of smaller seas, each with their own designation (from west to east):

In addition to the seas, a number of gulfs and straits are also recognised:

Geology

The geology of the Mediterranean is quite complex, involving multiple periods of drying and re-flooding from the Atlantic Ocean. Sediment samples from the bottom of the Mediterranean Sea that include evaporite minerals, soils, and fossil plants show that about 7.2 million years ago in the late Miocene period the Strait of Gibraltar was blocked and the Mediterranean Sea evaporated into a deep basin with a bottom over two miles below the world ocean level. The Sea was reduced to a couple of lakes with varying salinity and probably even dried up, leaving for quite some time a desolate salt basin. Even now the Mediterranean is relatively salty compared to the adjacent North Atlantic due to its near isolation by the Straits of Gibraltar and its high rate of evaporation.


The first solid evidence for the ancient drying out of the Mediterranean Sea came in the summer of 1970, when geologists aboard the deep sea research and drilling ship Glomar Challenger brought up drill cores containing gypsum, anhydrite, rock salt, and various other evaporite minerals that only form from drying of brine or seawater. One drill core contained a wind-blown cross-bedded deposit of deep-sea foraminiferal ooze which had dried into dust and been blown about by a sandstorm and ended up in a brine lake. These layers were alternated with layers containing marine fossils, indicating the different drying and flooding periods. Other evidence of drying comes from the remains of many (now submerged) canyons that were cut into the sides of the Mediterranean basin by river action when it was dry. The area underwent repeated flooding and dessication over a 700,000 year span. About 5.4 million years ago at the start of the Pliocene period the barrier at the Strait of Gibraltar broke, permanently reflooding the basin.


The Mediterranean Sea has an average depth of 1,500 m and its deepest point is over 5,000 m (in the Ionian Sea). The coastline extends 46,000 km surrounded by 22 countries.


In the last few centuries, humankind has done much to alter Mediterranean geology. Structures have been built all along the coastlines, exacerbating and rerouting erosional patterns. Many pollution-producing boats travel the sea that unbalance the natural chemical ratios of the region. Beaches have been mismanaged, and the overuse of the sea's natural and marine resources continues to be a problem. This misuse speeds along and/or confounds natural processes. The actual geography has also been altered by the building of dams and canals. The perfect little Sea that geology gave Western history is, in many ways, in great jeopardy.


The Mediterranean was once thought to be the remnant of the Tethys Sea, which formerly girdled the Eastern Hemisphere. It is now known to be a structurally younger basin.


Though the flooding of the Mediterranean happened long before any human being could observe it, it is sometimes referred as a possible basis for the Biblical story of Noah, or even the myth of Atlantis. The possible flooding of the Black Sea from the Mediterranean is thought to have happened near the dawn of recorded history and may provide a more recent basis for such myths.


See also

External links

  • Environment and Development in the Mediterranean Region (http://www.planbleu.org/indexa.htm)

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