586 



GEOLOGY OF CENTRAL WISCONSIN. 



In Lorti and Westpoint, T. 10, R. 8 E., and T. 10, R. 7 E., rock exposures are very 

 frequent along the bluff sides, but only a few prominent points can be described. 

 Kingsley's bluff, on the edge of the high country in the N. E. qr. of Sec. 26, and S. E. 

 qr. of Sec. 23, T. 10, R. 8 E., has the structure shown in Fig. 40. The succession of 

 layers is indicated in the following, beginning above : 



Feet 



I. Drift- covered slope with^ 



out exposure 20 



II. Lower Magnesian lime- 



stone: in quarry; 

 thin-bedded, top gla- 

 ciated 5 



III. Drift- covered slope: 



without exposure . . . 100 



IV. Madison sandstone: 



white, incoherent; on 

 the edge of a flat 

 bench in the hillside. 5 



V. Mendota limestone: yel- 



lowish, regularly bed- 

 d e d , fine - grained; 

 containing: silica, 

 44.57; alumina, 8.68; 

 iron peroxide, 1.18; 

 iron protoxide, 0.22; 

 lime carbonate,2&.()9; 

 magnesia carbonate, 

 17.97; water, 1.28= 

 99.83; exposed in a 



i~ 



(22 



< _s 

 a" s 



53 



3 .. small quarry 10 



** o VI. Flat drift-covered slope 



without exposure 40 



n 5 VII. Potsdam sandstone: 

 white, fine-grained, 

 * | loose; alternating 



g g with harder, yellow, 



_ calcareous bands; 



-3 forming the edge of 



* a bench 40 



.1 VIII. Steep slope without 

 exposure, the rock 

 covered by sand from 

 its own disintegra- 

 tion 90 



Total 



310 



The Mendota is quarried again 

 on the side of the hill just west 

 of the depot at Lodi, where it 

 presents the typical yellow color 

 and reddish stains,- and is over- 

 laid at the top of the hill by 



