This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 Excerpt: ...and this material becomes scratched as it is dragged onward, in contact with the sharp sand held by the glacier. 'The sand and stones also scour the floor of the valley and its walls. If the glacier from any cause retreats, the rocks are seen to be polished and moulded by the rasping action, and to be beautifully ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 Excerpt: ...and this material becomes scratched as it is dragged onward, in contact with the sharp sand held by the glacier. 'The sand and stones also scour the floor of the valley and its walls. If the glacier from any cause retreats, the rocks are seen to be polished and moulded by the rasping action, and to be beautifully marked with the scored lines and grooves that were observed by Sir James Hall in Scotland. 5. The Lost Glaciers Of The British Isles It is now time to see how the views of the Swiss geologists came to be applied to explain the mysterious scratched surfaces and the accumulations of boulder-clay and gravel in our own islands. In 1832, Louis Jean Rodolphe Agassiz, who was destined to become a distinguished naturalist, was made Professor of Natural History at the Academy of Neuchatel. He was only twenty-five, but such confidence was felt in him that his salary was defrayed by a special subscription among the citizens. Agassiz came under De Charpentier's influence, and was soon convinced of the former extension of European glaciers. He took, indeed, an exaggerated view of the mantle of ice that, as he believed, once wrapped about the world; but his local studies in the Alpine valleys furnished him with evidence of great importance. He specially observed the rounded surfaces of rock, moulded and scratched by glaciers in old days, and these became generally known by the name of roches moutonnees. De Saussure had invented this quaint term at the end of the eighteenth century, but he did not recognize that his hummocky rocks had anything to do with ice-smoothing. In the second volume of his Voyages dans les Alpes, he wrote: "Behind the village of Juviana or Envionne the modern Evionnaz in the valley of the Ehone we see rocks with the form that I call m...
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Add this copy of The Changeful Earth; an Introduction to the Record of to cart. $65.41, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2016 by Palala Press.
