Reports and Papers Volume 10

Reports and Papers Volume 10

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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. 1900 edition. Excerpt: ...road beds and on side hills. The materials of this drift are porous bowlder clay interspersed with pockets of gravel and sand. The color varies little from the dark yellow several feet below the surface to the light FK 4U A field of lowan bowlders In northwestern Lincoln township. immediately beneath the soil layer. It is rich in calvitttt -rbonate and effervesces with dilute hydrochloric acid even in the surface layer of soil. Perhaps the most conspicuH- surface feature is the large granite bowlders. Where none bwn removed these often present an appearance not to a distant flock of sheep, and many acres are with rock fragments from one or two feet to many feet The prevailing type is the red granite. These ustiUv coarse-grained, and sometimes show striated or glacial planed surfaces. A large rock of this species is itt the northern part of section 14, Kensett township. sdtuost directly upon the limestone. It is made of crystals of orthoclase feldspar with quartz. were not accurately determined, but it is aaore than twelve feet high, twenty feet long and ten to twelve feet wide. Among a certain class of inhabitants of the immediate neighborhood the question whether or not a large deposit of gold might be found in the interior of this monster is a prevalent one. Gray granites are common, and specimens of the darker basic rocks are not exceptional. WISCONSIN DRIFT. It was during the latest ice epoch recorded in Iowa that the hills of the Altamont moraine were built, and the glacial material strewn over western Worth county. So short a time have the agents of degradation acted that the existing land forms are essentially those fashioned by the retreating glacier. Modification of the material thus laid down has progressed to only a slight...
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Product details

  • Paperback | 192 pages
  • 189 x 246 x 10mm | 354g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236518411
  • 9781236518415