PHYSICAL FEATURES OF HUCKLEBEEBY MOUNTAIN. 167 



Creek, which finally adds its waters to those of the Snake soon after the 

 latter stream crosses the southern boundary of the area mapped. 



The physical features of the country present strikingly varied outlines 

 of mountain, ridge, valley, and upland, with abrupt changes in configuration. 

 Constantly changing rock formations, with accompanying modifications of 

 topographic forms, make the region singularly picturesque, and the alterna- 

 tion of gently undulating and roughly accidented areas causes the region 

 to stand out in sharply defined contrast to the more monotonous Park 

 Plateau. 



Much of the country, especially the more elevated portions, are timber- 

 less, but large areas of mountain slope present a diversified park-like 

 appearance, covered with a vigorous growth of coniferous forest. Faulting 

 and folding of strata, with frequent changes in the inclination of beds, have 

 produced conditions favorable to the flow of springs, the many mountain 

 torrents making- the region a highly favored one in its water supplv. 



The region is well adapted to the haunts of wild animals, and the 

 dominant ridge of the country, characteristically named Big Game Ridge, 

 in former years furnished abundant sport for the hunter in search of bear, 

 elk, deer, and mountain lion. 



Unlike the areas of sedimentary beds which make up the Gallatin 

 Range and form the slopes of the Teton or Snowy ranges, the sedimentary 

 rocks of this region do not rest directly upon any exposed bod v of Archean 

 rocks, nor do they dip away in any one direction from a central mass. 

 Within this region no Archean rocks are known. Southward, in the Wind 

 River Range, the Archean presents a bold unbroken mass of pre-Cambrian 

 rocks, but its geological relations with the uplifted sediments of this region 

 can not be determined, owing to the accumulated volcanic material, which 

 conceals everything beneath it in the intervening country. In much the 

 same manner the breccias of Two Ocean Plateau and the rhyolites of the 

 Park Plateau prevent any precise interpretation of the structural relations 

 of this region with the country to the north and east. 



It is evident that the powerful forces which uplifted this mountain mass 

 acted from several different centers and produced a somewhat intricate 

 structure. The uplifting of the mass was accompanied by profound fault- 

 ing and folding, and in places by marked compression of strata. Subse- 

 quent orographic movement produced secondary faulting, adding much in 



