LATER MORAINES OF LAKE MICHIGAN, SAGINAW, AND HURON-ERIE LOBES. 271 



than parts of an esker, but it is in all probability a part of the same formation as the Lamotte 

 esker. 



KOYLTON ESKERS. 



In the eastern part of Koylton Township two finely formed eskers run southwest and 

 end in a swampy trough which runs south to Clifford. The eastern esker is on the line between 

 sees. 14 and 23, Koylton Township; after following a winding course for over one-half mile 

 west, it turns southwest for 1J miles and becomes considerably higher and more bulky. It is 

 an excellent type of esker, 40 to 50 feet high and with very steep sides and narrow undulating 

 top composed of coarse gravel and pebbles. 



The western esker, which is not so well developed, runs about 1J miles to the same swampy 

 trough. A chain of gravelly knolls running south and curving southwest for about 1J miles 

 from Kingston seems like a broken and poorly developed esker. 



OTTER LAKE ESKER. 



The great gulf in the morainic deposits in the western part of Watertown Township, Tuscola 

 County, contains many kames and some short esker-like ridges. At its southern end, where it 

 emerges on the higher ground, an esker of large size and typical form runs south from the middle 

 of sec. 29 about to the middle of sec. 32. The ridge is 100 to 200 feet wide on top and 70 or 

 80 feet high, and the troughs on the two sides are ponds of considerable depth. South of this 

 fragment the symmetrical form of the esker is broken for nearly a mile to the middle of sec. 5, 

 Marathon Township, Lapeer County, the break appearing to mark the front of the Otisville 

 moraine at the time the ridge to the north was made. At the break there is some offsetting, 

 for when the esker begins again it runs to the southeast. For about a mile it is not so strong 

 and high and is broken abruptly by a pond in the middle of sec. 9. At the east side of the 

 pond the esker rises sharply to a height of 70 or 80 feet and continues southeastward into a 

 jumble of kames and ridges and morainic knolls which fills a considerable area in sees. 10, 11, 

 14, and 15. At the east end of this area another short gravelly ridge runs southeast in sees. 14 

 and 13 to the bank of the Imlay channel, half a mile distant. 



OREGON ESKER. 



In sec. 13, Richfield Township, Genesee County, a finely developed esker, 50 or 60 feet 

 high with deep troughs along its sides, runs south and, turning southeast across the county 

 line, crosses sec. 19 into sec. 29, Oregon Township, Lapeer Comity. This esker is remarkable 

 for the way hi which it terminates. It passes thixmgh the Fowler moraine to the trough in 

 front and there merges abruptly into a small gravelly delta fan, which measures about three- 

 quarters of a mile by half a mile and is typically developed in its relation to the esker. 



MISCELLANEOUS SMALL ESKERS. 



About 3 miles northwest of Imlay a large gravel ridge nearly a mile long hi the trough of 

 Mill Creek resembles much hi form and situation an esker, although it is in some respects like 

 a kame. It is higher and wider at its western end where it emerges into the Lum channel. A 

 number of smaller eskers are situated in various parts of this district. Several short, finely 

 formed eskers are associated with the Mayfield kames. 



DEANVILLE KAMES. 



A mile and a half west of Deanville, hi Burnside Township, Lapeer County, stands Dean- 

 ville Mountain, a cluster of high kames composed principally of gravel. Many bowlders, 

 mostly small ones, appear in the gravel, and stony till is seen in it in some places, especially 

 toward the base. Like most other kames, these are irregular in outline and have many knobs 

 and basins at different levels. 



