Book Description

Excerpt from The Zinc Deposits of Northeastern Tennessee Topography and drainage - The controlling surface features of the area within which the zinc deposits occur are northeast-southwest ridges, with their intervening valleys. The ridges, which lie in the middle part of the area, stand up from a few hundred to more than feet above the surrounding country, and many are properly called moun tains. Beginning with the south and naming them in their order north ward, the principal streams are Holston, Clinch, and Powell rivers. All these have a southwesterly course and empty into the Tennessee. The valley of the Holston is wide and open, and is occupied by well rounded hills from to feet above sea level. Clinch River flows through and follows the course of the ridgy part of the area, winding its way from one ridge to another, or through ridges, forming water gaps, and for the most part lying in a narrow valley. Powell River lies between the ridges of the area and Cumberland Plateau to the northwest. Southwest of Tazewell, the water divide between Clinch and Powell rivers is poorly defined. The area between these streams is much broken, the hills being promiscuously arranged, with steep, tough soil-covered slopes, and with crests from 200 to 500 feet above the intervening val leys. A striking feature of this area is the great number of large sink-holes. Many of these have the usual funnel-shaped form common to such de pressions, and may be expected upon either flats or Slopes; but there are many that assume the shape and size of erosion valleys. The length of such is measured in miles. They are several hundred feet deep, and have large tributary valleys entering from the sides. These are all depressions of solution, formed by the work of ground-water upon the limestone of the area, and the drainage into them passes ofi underground. Even in the formation of the valleys which open out into the streams, solution has been a factor at least equally important with erosion. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.