And the only manner in which the reef could extend outwards, would be by the gradual accumulation, at the foot of its seaward face, of a talus of coral fragments torn off by the violence of the waves, which talus might, in course of time, become high enough to bring its upper surface within the limits of coral growth, and in that manner provide a sort of factitious sea-bottom upon which the coral embryos might perch.
Torbay, as may well be supposed, is an admirable dredging spot; perhaps its two best points are round the isolated Thatcher and Oare-rock, and from the mouth of Brixham harbour to Berry Head; along which last line, for perhaps three hundred years, the decks of all Brixham trawlers have been washed down ere running into harbour, and the sea-bottom thus stored with treasures scraped up from deeper water in every direction for miles and miles.
He saw her lying torn and twisted upon the ochre vegetation of some distant sea-bottom, to be presently overrun and looted by some savage, green horde. He looked at Gahan. "Are you ready, San Tothis?" asked the jed. "All is ready." "Then cut away!" Word was passed across the deck and over the side to the Heliumetic warriors below that at the third gun they were to cut away.
Lake began inventing and building submarines he has been interested in the possibilities which submarines offer for the exploration of the sea-bottom and for the discovery of wrecks and recovery of their valuable cargoes. His first boat, the Argonaut, as we have heard, possessed a diving chamber for just such purposes.
Beyond this depth the sounding-lead rests, not upon the wall-like face of the reef, but on the ordinary shelving sea-bottom. And the distance to which a fringing reef extends from the land corresponds with that at which the sea has a depth of twenty or five-and-twenty fathoms.
Long enough ago, in Trinidad at least, to allow water probably the estuary waters of the Orinoco to saw all the upheaved layers off at the top into one flat sea-bottom once more, leaving as projections certain harder knots of rock, such as the limestones of Mount Tamana; and, it may be, the curious knoll of hard clay rock under which nestles the town of San Fernando.
Indeed, it is very questionable whether any earthquake waves are ever produced in the ocean, except when the sea-bottom undergoes a permanent vertical displacement. Lake Tahoe. From inquiries made of the inhabitants of the shores of Lake Tahoe, I was not able to discover that any rhythmical oscillations of the level of its waters have ever been noticed.
Other earthquakes have indeed been followed by oceanic disturbances; but these have been accompanied by terrestrial motions, so as to suggest the idea that they had been caused by the motion of the sea-bottom or of the neighboring land.
So they determined to seek her out. "We will go to her, like children to a grandmother, etc. The others have no delicacy of sentiment, etc. And she will thus learn who really remember, really love her, etc." Provided with congratulatory bouquets, they set forth. It is very hard to find a dweller on the very sea-bottom of poverty. Perhaps that is why the effort is so seldom made.
Thus, not only is it certain that the chalk is the mud of an ancient sea-bottom; but it is no less certain, that the chalk sea existed during an extremely long period, though we may not be prepared to give a precise estimate of the length of that period in years. The relative duration is clear, though the absolute duration may not be definable.