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The waning days of glaciation,brought on a new worry for prehistoric people,who liked to live on the coast. This article is written in a story like sequence by region,to show that many cities that are now underwater,which were once the main cities of its day.

First is this map to show how rapid Sea level increase was in the early days of the Interglacial period, today we are in the almost flat part at the far left end of the black line.

[Image: Post-Glacial_Sea_Level.png]


That is why many cities were drowned,since they lived during the time of rapid sea level increase,very visible in their lifetime.

Here is the article about the cities that are now underwater,some as deep as 400 feed deep!

Drowned Cities


Quote:Gradually rising seas
For 4,000 years, the world’s sea level has been inching up.
This has been caused by
(a)   the melting of the post-Flood ice and
(b)  the gradual evaporation or outflow of inland basins to the sea.
The gradual rise of the oceans is thus another clear relic of the Deluge.  Flood waters left behind on the land, in the form of ice or inland lakes, have been gradually returning to the oceans.  The result has been not only a drying out of the land, but a corresponding rise in sea level.
The Hadji Ahmed map of 1559, whose original source dates back thousands of years, shows a landbridge between Siberia and Alaska, which existed when the original map was drawn.  If the ocean between these two land masses were lowered 100 feet today, there would be a dry-land path between them.
According to some oceanographers and geologists, the ocean level may have been as much as 500 feet lower than today.
Ireland was connected with England; the North Sea was a great plain;  Italy was joined to Africa, and exposed land cut the Mediterranean into two lakes.
Since then, the rising seas have engulfed coastal land and islands, turning isthmuses into straits and large islands into underwater plateaus.

Along many of the world’s shorelines are lost islands, now deep below the sea, with remains of cities, palaces and temples.
The continental shelf
In fact, most of the continental shelf, which marks the true boundaries between the ocean basins and the continental areas, now lies under a mean depth of 430 feet of water. (It ranges from 300 feet to about 1,500 feet.)
The present continental shelf probably defines the edge of the oceans as they developed during the post-Flood glacial peak.  With the ice melt and the draining or evaporation of inland basins, the seas rose, with minor fluctuations, to their present level. 
“The ocean basins can thus be characterized as overfull – water not only fills the ocean basins proper, but extends out over the low margins of the continents.”  So notes a panel of geologists. (J.V. Trumbull, John Lyman, J.F. Pepper and E.M. Thompson, “An Introduction to the Geology and Mineral resources of the Continental Shelves of the Americas”, U.S. Geological Survey Bulletin 1067, 1958, p.11)
Oceanographers and geologists generally agree that a dramatic, rapid rise of water occurred several thousand years ago.  This has slowed to about 1.5 feet per century.
Undersea canyons
Around the world’s coastlines are undersea river canyons, which were once above the ocean.  Such canyons cannot be cut underwater.
* The submerged Hudson Canyon, one hundred miles long and hundreds of feet deep, could only have been formed above water when this extension of the Hudson River was dry land.
* Off the coast of Europe are the Loire, Rhone, Seine and Tagus canyons.  The drowned Rhine Valley runs under the North Sea to disappear between Norway and Scotland – showing that the North Sea was dry land.
* Numerous other canyons were cut at the edge of the former ocean basin (now submerged) : La Plata in Argentina, the Delaware and St. Lawrence in North America, the Congo in West Africa.  Off the African west coast are submerged river canyons whose rivers no longer exist in the now-arid land.

All these canyons were cut out above water.  Now they are submerged.

LINK to the rest

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