features clear graphics and simple field-guide procedures to guide hikers through the great outdoors. A revised and updated edition of a best-seller, this helpful resource offers readers ready access to the subject. This new edition features 200 new, two-color illustrations (more than 750 in all), updated graphs and tables, as well as two new chapters titled "Monitoring the Earth's Changes" and "Geologists of Note." This volume's lucid, easy-to-follow text covers all the key rudiments of geology and will provide nature lovers with a useful reference to various geological phenomena. The topics covered include: Air currents; Composition; Desertification; Greenhouse effect; Ice changes; Seafloor profiling; Seismic activity; Submersibles; Tides; Waterflow; and more.

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