| Preface Staff How to Use the Dictionary Fields and Their Scope Pronunciation Key A-Z Terms Appendix Equivalents of commonly used units for the U.S.Customary System and the metric system,metric system,and International System Geologic column and scale of time Some historical volcanic eruptions Principal regions of a standard earth model Physical properties of some common rocks Approximate concentration of ore elements in earth's crust and in ores Soil orders Elemental composition of earth's crust based on igneous and sedimentary rock World's estimated water supply Cloud classification based on air motion and associated physical characteristics Simplified classification of major igneous rocks on the basis of composition and texture Average chemical composition of igneous rocks Dimensions of some major lakes Characteristics of some of the world's major rivers The 100 highest mountain peaks |
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