shallow processes and for the pursuit of more Sediments are now known to undergo deforma tion in a wide variety of geological circumstances. quantitative relationships. With these goals in The deforming processes can happen on a vast mind, workers are increasingly drawing on the scale and at all stages before the material be principles and methods of the well-established comes fully lithified. In fact, as exploration of the engineering discipline of soil mechanics. earth continues, the widespread extent and im All this is beginning to attract wider geological portance of sediment deformation...

A recent national survey of geology students indicated that, In a subject so fundamental and yet so varied, every although they saw the need for a basic training in map- geologist will have his own views on geological maps - the work, the three-dimensional aspects involved formed the matters needing emphasis, the best methods of interpreta- single most difficult part of an introductory geology tion, good examples of maps, and so on. Instructors may course, and that it was generally taught in a way both ab- therefore urge in their taught courses different priorities stract and dull. At the...