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THE NATIONAL GEOGRAPHIC MAGAZINE 



ILLUSTRATIONS OF A UNIQUE POT HOLE WORN IN A GRANITE BOULDER ON THE 

 SHORES OF MONTEREY BAY, CALIFORNIA 



The pot hole is above the level of low tide, but is submerged at middle to high tides. 

 The first photograph gives a near view of the boulder, which has a rounded top and is about 

 4x5x3 feet. It also shows the pebble or "nest egg" which has eroded the crevice. The 

 second photograph shows the size of the hole. Photos from B. X. Tucker, Richmond, 

 California. 



