±35) 



G • /"~71 



Figure 9 Faults. A Normal fault; F foot wall; H hanging 

 wall ; /./. fault line ; f.p. fault plane or surface ; bac the hade ; ac 

 vertical displacement or throw; be horizontal displacement or 

 heave. Arrow shows direction of movement. B Reverse fault. 

 C Strike fault (normal) with slip along the dip. D The same 

 after erosion, showing repetition of strata. E Strike fault 

 (reverse) with slip along dip. F The same after erosion, show- 

 ing omission of strata. G Horizontal fault (dip fault with strike 

 slip) : ac horizontal displacement or heave. HJ, Thrust fault : H 

 section of folded area with position of thrust plane indicated by 

 dotted line; / area after thrusting showing older beds resting 

 upon younger ; ff thrust fault line. 



