Petrography - Introduction to the Study of Rocks in Thin Sections

406 Pages Indexed. Tan boards with black on gold lettering on the spine and front. Small round decoration also on front. Tight square book with no defects noted and flawless interior text pages. This book is concerned more with the description of rocks than with problems of genesis, more with petrography than with the broader field of petrology. Considerable space is devoted, nevertheless, to the mode of origin of igneous and metamorphic rocks, and even more is given to discussion of how sedimentary rocks are formed. It is assumed that the reader has already learned how to identify rocks by means of the hand lens, and is already acquainted with the principles of optical mineralogy. If he has this background, the present subject matter may be covered adequately by a year's course of six hours' laboratory work a week; indeed, by proper selection of rock types, the student may obtain a satisfactory basis of thin-section petrography within a semester.