444 p. B. WEEKS STRATIGRAPHY OF THE UNITA RANGE 



In plate 48, the high peak near the center background is mount 

 Lovenia. From this point to the right side of the photograph the direc- 

 tion is nortli-south, and shows the position of tlie anticlinal fold on the 

 north side of the highest portion of the range. In mount Lovenia the 

 beds dip south 4 to 5 degrees ; in the high ridge between the two peaks the 

 dip is 10 to 15 degrees north; in Tokewanna peak the dip is 25 degrees, 

 and still farther down the ridge to the north of Tokewanna peak the dip 

 increases to 45 degrees north, and continues at this dip until covered by 

 the overlap of Tertiary strata. 



On the Tidge at head of the East fork of Smiths fork and on the ridge 

 leading up to Gilbert peak, the strata dip south 5 degrees. A fault or 

 sharp fold in the strata is here developed and the beds dip 30 degrees 

 north, increasing to 45 degrees, well exposed on the east side of Smiths 

 fork. 



The area between the crest of the range and the prominent limestone 

 ridge drained by' the headwaters of Beaver creek and Burnt fork is 

 formed of heavily forested morainal ridges which completely mask the 

 structure. From Leidy peak the axis of the anticline follows closely the 

 ridge forming the divide between Ashley and Brush creeks on the south 

 and Carter creek on the north, crossing the Green river and terminating 

 in the faulted and flexed strata of 0-wi-yu-kuts plateau. Throughout 

 this area the beds of the "Uinta" formation dip to the north 3 to 10 

 degrees. 



Near the headwaters of Sheep creek a fault develops which brings the 

 nearly horizontal "Uinta" beds against the steeply upturned beds of the 

 Weber formation. From the horseshoe bend of Green river east to and 

 including the 0-wi-yu-kuts plateau the fault becomes a series of sharply 

 compressed folds, with occasional faultscarps having a general east or 

 southeast trend. The upper beds of the "Uinta" formation are involved 

 in this plication, the beds being metamorphosed into schists and quartz- 

 ites, and comprise the Bed Creek quartzite of King, Emmons, and Powell, 

 and referred by them to the Archean. East of 0-wi-yu-kuts plateau 

 the beds dip steeply northeast, with a northwest-southeast strike. 



On the opposite (south) side of the range there are several anticlinal 

 folds also indicating a compression at right angles to the major fold of 

 the range. The stratigraphy and structure of the eastern end of the 

 range have been described in detail by Emmons (2, pages 262-298). 



EXTENT OF MAJOR FOLD 



The general anticlinal structure of the Uinta range extends from the 

 west face of the Wasatch range to the foothills of the Park range in Colo- 



