Geology Its Past And Present Being a Lecture Delivered to the Members of the G
Geology Its Past And Present Being a Lecture Delivered to the Members of the G
George Douglas Campbell Argyll
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If any one should ask whether we have any evidence of similar effects being produced by water now if sands, and clays, and gravels are being now arranged in similar fashion by the rivers or by the sea, the answer is easy we have such evidence in abundance. A large sum is annually expended by this city, or at least by the trustees of your river, in removing the deposits which the Clyde is yearly forming ; and so rapid is the process, so great is the quantity of material which its waters annually... bring down from the country through which it passes, that un- less your steam-dredge were constantly at work, our own lives would probably suffice to see the channel destroyed, and the river cease to be navigable by vessels of any considerable size. And what the Clyde is doing now, we know that it had been doing during the unknown period of time which has elapsed since it began to flow. During that time the Clyde has brought down and depo- sited a very large part of the ground on which this city is built ; and we have the means of measuring the depth of the strata it has formed since our rude forefathers first began to navigate its waters.
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