United States or Mozambique ? Vote for the TOP Country of the Week !
As improbable as is this theory it is as plausible as the erosion theory, but both theories appear to be equally absurd. At some remote period of time the entire southwest was rent and torn by an awful cataclysm which caused numerous fissures and seams to appear all over the country.
But much more than this is demanded by the advocates of glacial erosion.
For, like a flowing river, the Church's thought of her Lord shaped itself to the intellectual banks of the generation through which it moved, even while, by its construction and erosion, it transfigured them. Nor did this movement cease with New Testament days.
Two more days of calm, interrupted with occasional gusts. Yesterday, Friday evening, Taylor gave an introductory lecture on his remarkably fascinating subject modern physiography. These modern physiographers set out to explain the forms of land erosion on broad common-sense lines, heedless of geological support. They must, in consequence, have their special language.
But, on the other hand, since he did not know the manner in which these perched stones are deposited in our days by glacial action, he had recourse to another explanation: He supposes that the rock was worn away around its base by the continual erosion of water and air, while the portion of the rock which served as the base for the granite had been protected by it.
Owing to the irregular erosion of the bed rocks, and to the yet more irregular deposition of the detritus, there are very numerous lakes which are only slowly filled up or by erosion provided with drainage channels.
What a sight for these men of a world so old that age long erosion had washed away the last traces of hills, and filled in all of the valleys!
A more striking object-lesson in erosion by rain would be hard to find. There were no naked rocks; short, thick vegetation covered even the steepest slopes, and the vegetable acids which this generated, and the perpetual rains, weathered the mountains down. It soon became so wet that we stopped far short of the head of the valley, and turned back.
Its surface of naked, sun-flayed rock is broken here and there with gigantic heaps of piled stone, with caves and caverns, with sombre marshes which sometimes become gloomy and forbidding lakes, and with peculiar crater-like depressions called dolinas, formed by centuries of erosion.
ANCIENT VOLCANIC ROCKS. It is in these materials and structures which we have described that volcanoes leave some of their most enduring records. Even the volcanic rocks of the earliest geological ages, uplifted after long burial beneath the sea and exposed to view by deep erosion, are recognized and their history read despite the many changes which they may have undergone.
Word Of The Day