1 2 6 CHA RLES R. DR YER 



and 75 feet, falling to 30 feet at one point where a ditch has 

 been cut through it. The crest is usually sharp, and the lateral 

 slopes are as steep as the material will permit. A small pit which 

 has been opened on the southeast slope shows coarse rounded 

 gravel without definite stratification. The ditch is cut through 

 sand and fine gravel. At one point near the lake shore there is 

 an outcrop of cemented gravel. These are the only exposures, 

 and since the whole ridge is covered by a heavy growth of oak 

 timber, investigation is difficult. 



A mile and a half to the north the gravel ridge just described 

 is paralleled by an equally massive ridge of till which rises 50 

 to 60 feet above lake level and 30 to 40 feet above the general 

 level of the country. It is broad and flat-topped with steep and 

 symmetrical slopes, and pitted with numerous small kettles. It 

 extends westward three fourths of a mile and then, bending 

 sharply to the west of south, is prolonged an equal distance in 

 that direction to the northwest corner of High Lake. The 

 southern half of this portion, however, is composed of gravel ; 

 the transition from till to gravel being abrupt and marked only 

 by a slight change in the trend. The gap between the ends of 

 the two gravel ridges above described is almost closed by a 

 series of broken ridges of sand, generally less than ten feet high, 

 but rising in one sharp peak to forty feet. 



From the central mass of the till-ridge two short spurs pro- 

 ject toward the south. One of these is separated by only a 

 small gap from a ridge of sand which continues in the same 

 direction to the northeast corner of High Lake and along its 

 eastern border. On the north it is broad, rounded, and 40 feet 

 high, but narrows and falls toward the south to a height of 5 

 feet, then widens and rises to 35 feet at the southern end. The 

 lowest part of this ridge is a pile of angular bowlders up to a 

 foot in diameter, with the interstices filled with sand. 



The till-ridge is prolonged a mile or more to the northeast 

 by a broad elevation of complex structure and topography. The 

 greater portion of its mass seems to be composed of sand, which 

 forms the highest peaks, 65 and 70 feet above lake level. An 



