QUATERNARY F03,}/[ATI0N3-THE DRIFT. 203 



ing striffi, the rock ridges and drift ridges of flowing outline have a 

 westerly or southwesterly trend. On the west side of the Eange and 

 adjacent to it, they have a southerly or southeasterly inclination. In 

 ■ the upper portion of the Eock Eiver valley, they are often exceedingly 

 conspicuous in their southerly, southeasterly or southwesterly trend 

 according to their position within, on the east, or on the west of the 

 main line of glacial movement. The persistency and uniformity of 

 this arrangement in Dodge and Jefferson counties is something re- 

 markable. As will be observed, in all these cases, the arrangement 

 of this class of drift hills corresponds to the direction of the glacial 

 grooves. 



In this conneetioTi we need to consider some peculiar phenomena 

 that occur at Mr. Smith's quarry, near Burlington, and at Mr. Cas- 

 tleman's, in East Troy. The position of these quarries is such as to 

 make the following facts of much interest in relation to the Kettle 

 Eange, aside from that jj^ 4 



which attaches to them in- yy --^^.igi^jgi -:^- _, -"n^mii Lf^_. ■_ ti^.nr 

 dependently. The accom- 

 panying sketch represents 

 a vertical section along the 



east side of Smith's quarry. «■ '%°}}^ "^^^^ oflimestone. ». Shaly beds. c. Thick Uyer, 

 ^ "^ of limestone fractured at the left. d. Drift containing 



The iipper four or five feet tuted blocks of limestone, 

 consist of soil and debris resting upon the regularly bedded argilla- 

 ceous limestone. The upper portion of the loose material is a marly 

 clay of dark reddish brown color, and partly stratified. The lower 

 portion is made up of fragments of the limestone that forms the body 

 of the quarry, imbedded in sand, clay, and gravel. The blocks of 

 limestone are angular and unworn, and sometimes not even separated 

 from the layers with which they were contiguous before disturbance. 

 They are almost uniformly tilted, so as to dip at high angles toward 

 the south or southwest, as represented in the figure. The number of 

 the titled blocks is so great, and their position so constant, that the 

 phenomena cannot be regarded as a mere chance occurrence. 



The surface of the undisturbed rock is frequently smoothed, but 

 no distinct striiB could be found. On the opposite side of White 

 river, five or six rods distant, the surface is thoroughly smoothed, but 

 presents no striae, and although planed to a general level, undulat- 

 ing portions are smoothed in a way not readily attributable to ice. 

 Taken altogether, the phenomena seem to point to original polishing 

 by glacial agencies, and subsequent modification by water. 



In the northern part of the quarry, the strata are removed to a 

 lower level. The upper layer represented in tlie sketch is firm and 



