Description
List of Plates Preface to the current edition Preface to previous editions Key to maps Chapter 1 Strata – the ground rules Chapter 2 Horizontal strata Contours Horizontal and vertical strata in the landscape Geological maps Chapter 3 Dipping strata Structure contours (strike lines) Construction of structure contours True and apparent dip Calculation of the thickness of a bed Width of outcrop Inliers and outliers Exercises using geological survey maps Chapter 4 Three-point problems Construction of structure contours Depth in boreholes Insertion of outcrops Chapter 5 Unconformities Overstep Overlap Sub-unconformity outcrops Exercises using geological maps Chapter 6 Folding Anticlines and synclines Asymmetrical folds Way-up criteria Similar and concentric folding Two possible directions of strike Exercise on published geological survey map Chapter 7 Map solution without structure contours 1 Chapter 8 Faults Normal and reversed faults The effects of faulting on outcrops Classification of faults Calculation of the throw of a fault Faults and economic calculations Wrench or tear faults Pre- and post-unconformity faulting Structural inliers and outliers Posthumous faulting Isopachytes Exercises on published geological survey maps Chapter 9 Map solution without structure contours 2 Chapter 10 More folds and faulted folds Plunging folds Calculation of the amount of plunge The effects of faulting on fold structures Displacement of folds by strike-slip (wrench) faults Calculation of strike-slip displacement Faults parallel to the limbs of a fold Sub-surface structures Posthumous folding Polyphase folding Bed isopachytes Exercises on geological survey maps Chapter 11 Igneous and impact features Pyroclastic rocks Concordant intrusions Disordant intrusions Impact features Exercise on geological survey map Impact features Chapter 12 Economic problems Chapter 13 Complex structures Nappes Thrust faults Axial plane cleavage Description of a geological map The geological history of Map 45 Exercise on geological survey map Appendix Glossary Index
