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Updated: June 6, 2025
The land seems but an undulation of the sea-bed: its highest ridges do not rise more than the height of a man above the salines on either side; the salines themselves lie almost level with the level of the flood-tides; the tides are variable, treacherous, mysterious.
Over thousands of miles of sea-bed it found me at a spot where the telegraph instruments never spoke before, and may never speak again until the end of Time. We were encamped fifteen miles from Lichtenburg, in a place made green by a clear and brimming river. I had wished to send a telegram, and the obliging orderly had undertaken to tap the temporary wire and "call up" Lichtenburg.
All round my islands the Atlantic then, as now, had a depth, as I said before, of two thousand fathoms; indeed, in some parts between the group and Portugal the plummet of your human navigators finds no bottom, I have often heard them say, till it reaches 2,500; and out of this profound sea-bed the volcanic energies pushed up my islands as a small submarine mountain range, whose topmost summits alone stood out bit by bit above the level of the surrounding sea.
But the part of the island that remained had been somewhat increased in size by ejected materials. Of the other islands and islets some had disappeared; some were partially destroyed; some were enlarged by fallen debris, while many changes had taken place in the depth of the neighboring sea-bed. Two new islands, Steers and Calmeyer, were formed.
"If he guessed wrong," finished Abe dryly. "If he guessed wrong," admitted the Seer reluctantly. "If it looked good enough for you to risk an opinion you would have some strong talking points," ventured Abe. "There must be five hundred thousand acres in that old sea-bed. The Colorado carries water enough for five times that area.
For many centuries men were puzzled over those strange growths in the sea Corals and Sponges. Were they to be classed as animals or as vegetables? It was by no means an easy question to answer. Corals, with their pretty colour, and their stems and branches growing up from the sea-bed, were said to be shrubs, but they were as hard as rock, said some people, so how could they be vegetables?
A vast amount of material was cast out of the submarine crater, forming an island 500 yards in length and rising up to nine feet above the surface, but after a few days it was broken up and dispersed over the sea-bed by the action of the waves. Volcanoes, p. 262.
Week 24 The next thing we have to account for is the bed of shale or hardened clay covering over the coal. Now we know that from time to time land has gone slowly up and down on our globe so as in some places to carry the dry ground under the sea, and in others to raise the sea-bed above the water.
The second layer shows that this sea-bed in time became dry land, and was covered with soil what had once been the seashore gradually giving place to a forest. But how do we know that such a wonderful change was wrought in process of time?
At length a great bar was formed across the northern part of the gulf, making a sort of inland sea. Then the hot climate caused the water to evaporate, while from time to time the Colorado overflowed its banks, spreading a rich sediment over the former sea-bed. Various parts of this depression, which, like Palestine, lie below the sea-level, are known as Salton, Coahuilla, and Imperial Valleys.
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