This manual was written primarily to assist undergraduate students in field training. It also offers some specialized procedures and data to advanced students and professional geologists. To keep the book a reasonable length, the more specialized materials are presented by brief descriptions, outlines, and diagrams. I have tried, however, to describe basic procedures in enough detail so that students can follow them with little if any supervision. It is assumed that the reader can identify common rocks and minerals and is acquainted with geologic structures and the basic principles of stratigraphy. Although a knowledge of petrography is desirable for some of the studies described in the last four chapters, it is not essential for the field procedures them selves. The first eleven chapters deal primarily with techniques and basic concepts of field work. Although each of these chapters can be used independently, they are organized as a unit to help guide the student from one stage of his training to another. Chapter 1, for example, describes note taking and collecting for general field work, and also provides suggestions foe students who want to collect data and specimens before starting a formal course in field geology. chapter 2 describe the basic uses of the compass, clinometer, and hand level. Chapter 3 introduces traversing by pace and compass methods and describes a complete field project suitable for the beginner. Procedures for plotting geologic features on base maps and aerial photographs are given in Chapter 4 and 5, which also include a general discussion of rock units and contacts. The next four chapters comprise a related sequence, describing first the instrumental methods used in making maps of areas for which there is no suitable base, and then suggesting consecutive steps for plane table and aerial photograph projects. chapter 10 introduces techniques used in detailed geologic studies, and includes a discussion of systematic sampling. chapter 11 concludes the first group of chapters with suggestions on report writing.

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