ATTITUDE OF THE STRATA. 



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Part II — Structure. 



IXTRODUCTIO.X. 



In the first part of this paper the geo- 

 logic formations of the Taylorville region 

 were briefly discussed, so far as their com- 

 position is concerned. It is now proposed 

 to consider their geologic structure. 



One section 17 miles in length, and four 

 smaller parallel sections, varying in length 

 from three-fourths of a mile to one and 

 one-half miles, were carefully measured 

 with atape. The thicknesses of the forma- 

 tions determined by these measurements 

 are given in the tabular view i >f the geologic 

 column on page 372, and the structure is 

 indicated in the accompanying figures. 



The long section (figure 1) throughout 

 its whole extent was measured almost con- 

 tinuously in the direction north 70° 30' 

 east. Beginning on the southwest at an 

 elevation of 3,100 feet on Spanish creek, 

 it crosses Hough peak at 7,254 feet, and 

 reaches Indian creek, one and one-halt 

 miles above Taylorville, at an altitude of 

 3,500 feet. Continuing in thesame course, 

 it crosses mount Jura at 6,000 feet about 

 one-third of a mile south of the summit. 

 The upper portion of 1 1 ineliman ravine 

 and other small ravines are crossed to 

 reach Hosselkus creek, two and three- 

 fourth miles above Genesee, at an elevation 

 of t,050 feet. From thence,a1 an elevation 



of 6,500 feet, it passe- oVef the northern 

 portion of Bornfels point, and skirts along 

 the top of the southern slope of the monu- 



tain. whose summit is three miles directly 

 north of Flournoy's. 



The strike of the n.eks throughout the 

 region is north 5° to 65° west, and the dip, 



I.I Bum.. i . -■" . Am., Vol. : ; 



