270 Pii'sxon and Bice — Geology of Tripyramid Mountain. 



it, sometimes called Fourth Pyramid. On the south it 

 descends to a bench, or roughly level area, known as Flat 

 Mountain, whose elevation is about 2500 feet above sea level 

 and which in turn again descends into the valley of Cold 

 River. North Pyramid is about 4200 feet above the sea, the 

 other pyramids are a little lower. The mass, as thus defined, 

 is over two miles long, by about one and a half broad ; the 



Fig. 1. 



Fig. 1. View of Tripyramid Mountain. 



Looking east from above the Swazeyfown Dam. The North Slide and 

 Eavine of Avalanches are seen to the left, the South Slide on the right. 



distance between the North and South Pyramids about a mile 

 along the crest. The details of the topography are shown on 

 the accompanying map, which has been compiled from various 

 sources, the approximate expression of the topography of the 

 older map of the Hitchcock Geological State Survey being cor- 

 rected in details by later maps of parts of the area made by 

 the Yale School of Forestry under the direction of Mr. Henry 

 Gannett and Prof. II. H. Chapman, by Mr. C. W. Blood, and 

 one of trails and stream courses by Mr. A. L. Goodrich, and to 



