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University of California Publications in Geology [You 13 



GEOGRAPHY 



The term 1 ' Cuyamaca Mountains" applies to three prominent peaks, 

 lying along a north-south line, within the main mountain range of 

 San Diego County. The highest of these peaks, South or Cuyamaca 

 Peak, is the loftiest mountain in San Diego County, rising to 651 5 feet 

 ahove sea level. The other peaks, Middle and North peaks, have 

 elevations of ahout 5800 and 6000 feet respectively. 



Pig. 1. Index Map. 



The term "Cuyamaca Region" is applied to the area of the 'Cuya- 

 maca Mountains, together with those portions of the surrounding 

 country which stand at considerable elevation, yet do not belong to 

 other mountain groups, such as Volcan Mountain to the north and 

 Laguna Mountain to the southeast. The area mapped includes about 

 eighty square miles, lying in the southeastern portion of the Ramona 

 Quadrangle and the northeastern portion of the Cuyamaca Quad- 

 rangle of the U. S. Geological Survey. 



The town of Julian, in the northern part of the area studied, lies 

 sixty miles by road northeast of San Diego City. In past years it 

 was the principal town of the Julian gold mining district. Its present 

 importance is as a trade center for the farmers of the neighboring 

 mountain valleys and as a stage station on one of the routes between 

 San Diego and the Imperial Valley. 



