XJi CONTENTS 



PAGE 



The different deposits of ocean, lake, and river Special marks of 

 littoral deposits The order of deposition during a transgression of 

 the sea The basins of deposition of earlier ages The deposits of the 

 deep sea Reading references 30 



CHAPTER V 

 CONTORTIONS OF THE STRATA WITHIN THE ZONE or FLOW 



The zones of fracture and flow Experiments which illustrate the frac- 

 ture and flow of solid bodies The arches and troughs of the folded 

 strata The elements of folds The shapes of rock folds The over- 

 thrust fold Restoration of mutilated folds The geological map and 

 section Measurement of the thickness of formations The detection 

 of plunging folds The meaning of an unconformity Reading refer- 

 ences 40 



CHAPTER VI 

 THE ARCHITECTURE or THE FRACTURED SUPERSTRUCTURE 



The system of the fractures The space intervals of joints The dis- 

 placements upon joints: faults Methods of detecting faults The 

 base of the geological map The field map and the areal geological 

 map Laboratory models for study of geological maps The method 

 of preparing the map Fold vs. fault topography Reading references 55 



CHAPTER VII 



THE INTERRUPTED CHARACTER OF EARTH MOVEMENTS : EARTH- 

 QUAKES AND SEAQUAKES 



Nature of earthquake shocks Seaquakes and seismic sea waves The 

 grander and the lesser earth movements Changes in the earth's 

 surface during earthquakes : faults and fissures The measure of 

 displacement Contraction of the earth's surface during earthquakes 



The plan of an earthquake fault The block movements of the 

 disturbed district The earth blocks adjusted during the Alaskan 

 earthquake of 1899 . . '." . . . . . . .67 



CHAPTER VIII 



THE INTERRUPTED CHARACTER OF EARTH MOVEMENTS : EARTH- 

 QUAKES AND SEAQUAKES (concluded) 



Experimental demonstration of earth movements Derangement of water 

 flow by earth movement Sand or mud cones and craterlets The 

 earth's zones of heavy earthquake The special lines of heavy shock 



Seismotectonic lines The heavy shocks above loose foundations 

 Construction in earthquake regions Reading references ... 81 



