586 



GEOLOGY OF CENTKAL WISCONSIN. 



In Lodi and Westpoint, T. 10, R. 8 K, and T. 10, R. 7 E., rook 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 iai the following, beginning above : — 



1. Drift-covered slope with- 

 out exposure. . • 



JFeet 



20 



11. 



III. 



8 " 



u .a 





.. 100 



Lower Magnesian lime- 

 stone: in quarry; 

 thin-bedded, top gla- 

 ciated ■ 



Drift- coveret 

 without exposure 



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; 

 contaiaing: silica, 

 44.67; alumina, 8.68; 

 iron peroxide, 1.18; 

 iron protoxide, 0.22; 

 lime carbonate,2-6-.b9; 

 magnesia carbonate, 

 17.97; water, 1.28= 

 99.83; exposed in a 

 small quarry 10 



VI. Flat drift-covered slope 

 without exposure. ... 40 



S VII. Potsdam sandstone: 

 ° white, fine-grained, 



g loose; alternating 



Q with harder, yellow, 



calcareous bands; 

 forming the edge of 



a bench 40 



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 hiU just -^'est 

 of the depot at Lodi, where it 

 presents the typical yellow color' 

 and reddish stains, and is over- 

 laid at the top of tlie hill by 



