CHAPTER I.. Preliminary Outline.

PRELIMINARY OUTLINE.

Subdivisions, 1. Dominant processes, 2.

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+Astronomic Geology+ 2 The earth as a planet, 2. Its satellite, 3. Dependence on the sun, 4. Meteorites, 4.

+Geognosy+ 5 I. The Atmosphere 5

Mass and extent, 6. Geologic activity, 6. A thermal blanket, 7. II. The Hydrosphere 7 Oceanic dimensions, 8. Geologic activity, 8. Chief horizons of activity, 9. III. The Lithosphere 9

Irregularities, 10. Epicontinental seas, 11. Diversities of surface, 12. The surface mantle of the lithosphere, 12. The crust of the lithosphere, 13. The interior, 14. Varieties of rock in crust, 14. Stratified rocks, 14. Conformability, 15. Relative ages, 15. The crystalline rocks, 16. Four great sedimentary eras, 17. The Archean complex, 18.

+General Table of Geologic Divisions+ 19