The Norfolk Sand (Classic Reprint)
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| Partner: | buecher.de |
| Hersteller: | Forgotten Books (Bonsteel, Jay A.) |
| Stand: | 2015-08-04 03:50:33 |
Produktbeschreibung
Excerpt from The Norfolk Sand This difference in coloration of the same material arises chiefly from slight differences in the amount of organic matter present and represents variations in the condition of its decomposition. Where drainage has been most complete and the soil has been most perfectly aerated, there is a tendency toward the destruction of organic matter in the loose, incoherent surface soil and a resultant tendency toward the lighter gray or nearly white color. In the lower lying areas, where there is a greater amount of moisture and where complete decomposition of organic matter is not the general rule, the colors become gradually darker with increasing humidity in the surface soil, until a brown, somewhat loamy covering is formed at the surface of the soil, showing its gradation toward other swampy and lower lying types. The subsoil to a depth of 36 inches or more is typically a medium to somewhat coarse, incoherent yellow sand. In small areas where the Norfolk sand occurs in connection with other types the deeper subsoil is often modified in color from the usual pale yellow to orange, red, or even mottled yellow and red. Such variations in the color frequently occur where the Norfolk sand is found in small patches and in close association with types of the other series. They usually mark a thin development of the Norfolk sand associated with soils of the Orangeburg or Sassafras series. Even in localities where the Norfolk sand is typically developed to a considerable extent it is not unusual to find near the margins of each of the areas of this type locations where borings at the greater depths show sandy yellow clay, or yellow friable clay, which characterize such types as the Norfolk sandy loam and the Norfolk fine sandy loam. These constitute the gradation into another type of the same series. A characteristic difference between the Norfolk sand and other sandy soils of the Coastal Plain is a yellow subsoil to the complete depth of 36 inches. In the case of the Sassafras and the Orangeburg sand, respectively, the subsoil is either orange sand or orange loamy sand grading into red sandy clay. Thus the Norfolk sand is easily distinguished from all other soils of similar texture within the region in which it occurs. Surface Features And Drainage. The surface topography of the Norfolk sand varies to some degree in the different areas within which it is found. In general the surface is level to slightly undulating, with no steep slopes and no pronounced stream channels or drainage ways within the area of the type itself. It is so easily permeated by atmospheric water that no large amount of erosion occurs, and consequently no pronounced topographic relief is formed. 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.
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