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One reason is, that the carse of Stirling has been upheaved some twenty feet, and thereby more or less drained, since the time of the Romans. The alluvium of the fens, on the other hand, has very probably suffered a slight depression. But the main reason is, that the silt brought down by the fen rivers cannot, like that of the Forth and its neighbouring streams, get safe away to sea.
If then the stream of the Nile should turn aside into this Arabian gulf, what would hinder that gulf from being filled up with silt as the river continued to flow, at all events within a period of twenty thousand years? indeed for my part I am of the opinion that it would be filled up even within ten thousand years.
Cap'n Amazon Silt, it seemed, had been everything on sea and land that a mariner could be. No romance of the sea, or sea-going, was too remarkable to be capped by a tale of one of Cap'n Amazon's experiences. Some of these stories of wild and remarkable happenings, the storekeeper had told over and over again until they were threadbare.
The Mississippi, for example, transports each year 113,000,000 tons of dissolved rock to the Gulf. THE VISIBLE LOAD OF STREAMS. This consists of the silt which the stream carries in suspension, and the sand and gravel and larger stones which it pushes along its bed.
And I made up he went to sea when he was twelve like I told ye, my dear. Ye-as. I did hate to lie to ye, an' you just new-come here. But I'd laid my plans for a long while back just to walk out, as it were, an' let these fellers 'round here have a taste o' Cap'n Am'zon Silt that they'd begun to doubt was ever comin' to Cardhaven.
Silt, who must have sent tales of him to your aunt. It's you who've turned him out of Cadover. It's you who've ordered him to be ruined today." Now Herbert arose. "Out of my sight, sir! But have it from me first that Rickie and his aunt have both behaved most generously. No, no, Agnes, I'll not be interrupted. Garbled versions must not get about.
Five of them lay buried in silt under the streets of Glasgow, one in a vertical position with the prow uppermost as if it had sunk in a storm. In the inside of it were a number of marine shells.
This was instructive. Passing to the freezing of salt water, he was not very clear. Then on to glaciers and their movements, theories for same and observations in these regions. There was a good deal of disconnected information silt bands, crevasses were mentioned. Finally he put the problems of larger aspect.
The blocks or pillars of stone would, he contends, check the lateral currents so as to compel them to let fall all their pebbles and gravel in the main channel where they would be rolled along until ground down to sand or silt and the transverse obstructions would detain the water upon the soil long enough to secure the deposit of its fertilizing slime.
And at every successive upheaval of the western mountains the displaced waters of the ocean swept over the lower lands, filling the valley of the Thames and of the Wey with vast beds of drift gravel, containing among its chalk flints, fragments of stone from every rock between here and Wales, teeth of elephants, skulls of ox and musk ox; while icebergs, breaking away from the glaciers of the Welsh Alps, sailed down over the spot where we now are, dropping their imbedded stones and silt, to confuse more utterly than before the records of a world rocking and throbbing above the shocks of the nether fire.
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