TENNESSEE PARK. 189 



the summit of Mount Zion, is an included sheet, about one hundred feet 

 thick, of sandstones and shales of the Weber formation, which can be traced 

 down the south slopes to the East Arkansas Valley. 



Tennessee Park. From Little Zion northward the Lower Quartzite beds 

 form a flat shoulder along the lower slopes of Mount Zion facing Tennessee 

 Park for a distance of several miles. Below this shoulder the steeper slopes, 

 scored by shallow ravines, are in the granite of the Archean, while above 

 are successively White Limestone, Blue Limestone, and Gray Porphyry, 

 with Weber Grits capping the whole and covering all the hills to the east 

 and north. Between No Name and Tennessee gulches there is a discrep- 

 ancy in the outcrops of the lower beds, which can only be explained by 

 a fault, approximately as shown on the map, by which their northern con- 

 tinuation is thrown more to the westward. All these western slopes are 

 thickly covered with timber, and it is not always possible to determine 

 accurately the outlines of the formations. Tennessee gulch heads on the 

 western slopes of Buckeye Peak and, flowing first westward past Coop- 

 er's Hill, takes a bend to the southward, afterwards bending again west- 

 ward into the open valley of Tennessee Park, beyond the limits of the 

 map, where it joins the main branch of the Arkansas, which descends from 

 the slopes of Homestake Peak. Between the south bend of Tennessee gulch 

 and the main Tennessee Valley, just west of the map, is a low ridge of 

 granite, gradually covered, as one goes north, by nearly horizontal beds of 

 Lower Quartzite. These beds can be traced across Tennessee pass west- 

 ward to the northern flanks of the Sawatch Range, where they cover the 

 spurs extending northwards to the valley of Eagle River. 



Along the western borders of the map northwards from Tennessee 

 gulch a fringe of outcrops of lower Paleozoic beds follow the foot of Cooper's 

 Hill and cross the upper valley of Piney Creek, which flows into Eagle 

 River through Tennessee pass. The body of Gray or Eagle River Por- 

 phyry overlying the Blue Limestone becomes very much thicker in this 

 region, and on the slopes of Buckeye Hill rises in horizon, leaving a portion 

 of the Weber Grits formation, consisting of shaly beds, beneath it. On El 

 Capitan Creek there is also a portion of the Weber Grits included in the 

 body of porphyry. On Taylor Hill, north of the head of Piney Creek and 



