By Ghillean T. Prance, Scott A. Mori
Read or Download Lecythidaceae - Part I. The Actinomorphic-flowered New World Lecythidaceae (Asteranthos, Gustavia, Grias, Allantoma, & Cariniana) (Flora Neotropica Monograph No. 21(I)) PDF
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Extra resources for Lecythidaceae - Part I. The Actinomorphic-flowered New World Lecythidaceae (Asteranthos, Gustavia, Grias, Allantoma, & Cariniana) (Flora Neotropica Monograph No. 21(I))
Example text
12 Chapter 1 The permanence of the methods used for soil stabilization never came into question for two reasons: 1) many of the methods were needed only during the construction phase, and 2) the materials used (such as cement and lime) were considered permanent. The first use of cement as a grouting material was about 160 years ago, and never raised any questions about permanence because of the past history of the use of concrete. The first use of chemical grout (sodium silicate, about 120 years ago) left no record of questions about its permanence (although there certainly must have been some) and there are no questions now.
Sedentary soils None Geological class 1. Residual 2. Cumulose B. Transported 1. Water soils (a) Alluvial (b) Marine (c) Lacustrine 2. Ice 3. Wind 4. Gravity 5. ) (a) Dunes (b) Loess (a) Colluvial Remarks Formed by rock weathering in place. Examples: Silty sand, sandy clay, or silty clay derived from sandstone. Marsh or swamp deposits (peats and mucks). River deposits—soils mixed, sorted, and deposited according to size. Fine-grained deposition in salt water. Fine-grained deposition in fresh water lakes.
Marsh or swamp deposits (peats and mucks). River deposits—soils mixed, sorted, and deposited according to size. Fine-grained deposition in salt water. Fine-grained deposition in fresh water lakes. Unstratified heterogeneous mixture of boulders, gravel, sand, silt, and clay. Stratified, usually granular. Sand. Windblown silt. Talus—accumulation of fallen rock and rock debris at base of steep slopes. Organic Matter—Organic matter consists of either partly decomposed vegetation, as in peats, or of finely divided vegetable matter, as in organic silts.