ISLANDS
AND
CONNECTING
RIDGES
,
FROM
DEEP-SEA
SOUNDINGS
And all these things recent investigation has proved conclusively.
Deep-sea soundings have been made by ships of different nations; the United States ship Dolphin, the German frigate Gazelle, and the British ships Hydra, Porcupine, and Challenger have mapped out the bottom of the Atlantic, and the result is the revelation of a great elevation, reaching from a point on the coast of the British Islands southwardly to the coast of South America, at Cape Orange, thence south-eastwardly to the coast of Africa, and thence southwardly to Tristan d’Acunha. I give one map showing the profile of this elevation in the frontispiece, and another map, showing the outlines of the submerged land, on page 47. It rises about 9000 feet above the great Atlantic depths around it, and in the Azores, St. Paul’s Rocks, Ascension, and Tristan d’Acunha it reaches the surface of the ocean.
Evidence that this elevation was once dry land is found in the fact that “the inequalities, the mountains and valleys of its surface, could never have been produced in accordance with any laws for the deposition of sediment, nor by submarine elevation; but, on the contrary, must have been carved by agencies acting above the water level.” (Scientific American, July 28th, 1877.)
Mr. J. Starke Gardner, the eminent English geologist, is of the opinion that in the Eocene Period a great extension of land existed to the west of Cornwall. Referring to the location of the “Dolphin” and “Challenger”
ridges, he asserts that “a great tract of land formerly existed where the sea now is, and that Cornwall, the Scilly and Channel Islands, Ireland and Brittany, are the remains of its highest summits.” (Popular Science Review, July, 1878.)
Here, then, we have the backbone of the ancient continent which once occupied the whole of the Atlantic Ocean, and from whose washings Europe and America were constructed; the deepest parts of the ocean, 3500
fathoms deep, represent those portions which sunk first, to wit, the plains to the east and west of the central mountain range; some of the loftiest peaks of this range—the Azores, St. Paul’s, Ascension, Tristan d’Acunba—are still above the ocean level; while the great body of Atlantis lies a few hundred fathoms beneath the sea. In these “connecting ridges” we see the pathway which once extended between the New World and the Old, and by means of which the plants and animals of one continent travelled to the other; and by the same avenues black men found their way, as we will show hereafter, from Africa to America, and red men from America to Africa.
And, as I have shown, the same great law which gradually depressed the Atlantic continent, and raised the lands east and west of it, is still at work: the coast of Greenland, which may be regarded as the northern extremity of the Atlantic continent, is still sinking “so rapidly that ancient buildings on low rock-islands are now submerged, and the Greenlander has learned by experience never to build near the water’s edge,” (“North Amer. of Antiq.,” p. 504.) The same subsidence is going on along the shore of South Carolina and Georgia, while the north of Europe and the Atlantic coast of South America are rising rapidly. Along the latter raised beaches, 1180 miles long and from 100 to 1300 feet high, have been traced.
When these connecting ridges extended from America to Europe and Africa, they shut off the flow of the tropical waters of the ocean to the north: there was then no “Gulf Stream;” the land-locked ocean that laved the shores of Northern Europe was then intensely cold; and the result was the Glacial Period. When the barriers of Atlantis sunk sufficiently to permit the natural expansion of the heated water of the tropics to the north, the ice and snow which covered Europe gradually disappeared; the Gulf Stream flowed around Atlantis, and it still retains the circular motion first imparted to it by the presence of that island.
The officers of the Challenger found the entire ridge of Atlantis covered with volcanic deposits; these are the subsided mud which, as Plato tells us, rendered the sea impassable after the destruction of the island.
It does not follow that, at the time Atlantis was finally ingulfed, the ridges connecting it with America and Africa rose above the water-level; these may have gradually subsided into the sea, or have gone down in cataclysms such as are described in the Central American books. The Atlantis of Plato may have been confined to the “Dolphin Ridge” of our map.
ANCIENT
ISLANDS
BETWEEN
ATLANTIS
AND
THE
MEDITERRANEAN
,
FROM
DEEP-SEA
SOUNDINGS
The United States sloop Gettysburg has also made some remarkable discoveries in a neighboring field. I quote from John James Wild (in Nature, March 1st, 1877, p. 377):
