628 GEOLOGY OF CENTRAL WISCONSIN. 



between the bowlder and its parent rock, on top of Kingsley's bluff, 

 near the southeast corner of Sec. 23, the Lower Magnesian is observed 

 polished and striated in a due west direction. Several of the valleys 

 of southern Lodi coincide with this direction. It has been stated as 

 a peculiar fact that bowlders of the quartzite that make up the Bnra- 

 boo ranges are not found, except sparingly, to any distance south of 

 these ranges, although of large size and abundant on both flanks of 

 the main range, and even on its higher portions, as also in the Devil's 

 Lake gorge, and in the valley between the two ranges. The explana- 

 tion evidently lies in the fact -that the east and west trend of the 

 quartzite blufi's has coincided with the direction of the drift move- 

 ment, which is proved to have been nearly due west by the bearings 

 of the grooves and strice observed. The little southing that appears 

 in these bearings would not carry the bowlders any distance south 

 before reaching the eastern limit of the driftless region. Bowlders 

 of dark colored quartz-porphyry are found along the road between 

 Montello and Kingston, Marquette county, having traveled 4 to 5 

 miles a little south of east from the large outcrops on Sees. 2 and 3, 

 T. 15, K. 11 E. In the eastern part of the town of Marion, T. 18, K. 

 11 E., Waushara county, are several mounds of granite, and in the 

 country for several miles to the west and south of west, bowlders of 

 the same rock are abundant. One of these, of extraordinarily great 

 size, and already mentioned as occurring on the S. E. qr. of Sec. 16, 

 has traveled in a direction of about W. 10 S., three miles from the 

 outcrop on the east line of Sec. 12. A number of angular bowlders 

 of Lower Magnesian limestone on the S. E. qr., Sec. 13, T. 17, R. 7 

 E., Adams county, have been carried in a similar direction from the 

 isolated limestone bluffs on Sees. 5 and 7, T. 17, R. 8 E., Marquetto 

 county. A large bowlder, 30.5 feet in circumference, of very coarse 

 granite, with large surfaces of brilliant felspar, rests on top of tho 

 hill at Waupaca, Waupaca county, having been brought eight miles 

 from a mound-like outcrop of the same rock on Sec. 32, T. 23, R. 12 

 E., in a direction of about S. 60 "W. 



But these bowlders, w T hose origin is so near their present positions, 

 are but few in number, compared with those that have corne from 

 great distances. Most of the latter have been brought from points 

 100 to 300 miles to the north, and possibly from places still further 

 north. It appears probable that the region of the northern peninsula 

 of Michigan has afforded a large proportion of them, though it is 

 quite possible that many have come from the north shore of Lake 

 Superior. The native copper fragments we may suppose to have been 

 chiefly brought from Keweenaw Point, for a distance of 300 niiles 



