Geology 



A comparison of the amount of rise and fall of the 

 tide in different places will make this clear- 

 Open Ocean 5 to 6 feet. 



Liverpool . . 34 



Morecambe Bay .... 45 



Bay of Fundy . . . . . 50 to 60 



The rise and fall of the tide causes, in the case of 

 narrow inlets and straits, very strong currents which, as 

 we shall see in a later chapter, have considerable effect 

 upon many geological processes now in progress, and 

 there is no reason to believe that many things to be 

 found in the solid rocks are not due to the action of 

 the tides during periods of the Earth's history now long 

 passed. 



