402 PLEISTOCENE OF INDIANA AND MICHIGAN. 



blown. Up to the south line of Huron County the beaches of tins district were studied in 

 considerable detail. 



To a point within about S miles of the north line of Sanilac County the Lundy beach runs 

 parallel with the Grassmere and generally a mile or less from it. Both are distinct individuals 

 throughout and may easily be traced continuously. 



Westward from a point west of Port Sanilac the Grassmere beach is perceptibly wider than 

 for some miles south of that place. About 2 miles southwest of Richmondville it divides into 

 two distinct ridges, which separate rapidly, and at a distance of 6 miles are fully a mile apart. 

 Farther north they draw in again to about half a mile. The lower and easternmost ridge appears 

 to be the stronger, continuing north for 5 or 6 miles with about the same strength as the undi- 

 vided beach. About 2 miles west of Forestville the upper ridge splits into two slender strands 

 which are nearly a quarter of a mile apart at the county line. 



Five miles south of the north county line the lower or main ridge divides again into two 

 ridges which at the county line are a mile apart. 



Three miles south of the county line the lower ridge splits once more into two strands 

 which are about half a mile apart at that point. The upper ridge of this pair is considerably 

 the stronger, the lower being weak and fragmentary. The weakness of this lower strand would 

 lead one to expect that any further splitting would appear in some of the higher, stronger 

 strands. 



A distinct gap between the lowest of the Grassmere strands and the Lundy beach, with 

 apparently no tendency to beach formation, is taken to represent a lowering of the outlet and 

 to correspond to the interval between the two beaches farther south where they are both single. 



About 3 miles north of Lexington the Lundy beach becomes wider than for some miles to 

 the south. In sees. 35 and 26, Sanilac Township (T. 11 N., R. 16 E.), the beach is very wide, 

 and for 2 miles is partly cut away along the shore in a fresh lake cliff. It happens that just 

 about at this place the Lundy beach begins to rise above its level in the area of horizontality. 

 It seems probable that the beach splits at this point, but to determine this fact accurately level- 

 ing is needed. Nearly all the measurements made by the writer in this region were by aneroid 

 barometer, with a few by hand level. Between Port Sanilac and Richmond ville a fragment of 

 beach, which has recently been extensively cut away both to the north and to the south, lies 

 half a mile to a mile east of the main line of the Lundy, which runs north from Black River. 

 The aneroid measurements of altitude indicate that this is a part of the Algonquin beach, but 

 it is barely possible that the measurements are inaccurate and that this is in fact a lower, 

 undisturbed strand of the Lundy. This is suggested further by the fact that a beach fragment 

 about a mile long on the bluff 4 miles north of Richmondville and another 1 to 3 miles north 

 of Forestville appear to have the altitude of the Lundy in the area of horizontality. 



From the bluff 6 miles north of Lexington the main ridge of the Lundy runs north as a 

 distinct and rather wide beach to about 3 miles north of Richmondville, where it splits into 

 two distinct, lighter ridges. These run about 5 miles north to the county line and are gener- 

 ally a quarter of a mile or less apart. Thus, at the north line of Sanilac County, the Grassmere 

 beach is represented by five beach strands in place of one south of Richmondville, and the 

 Lundy is represented by two and possibly three strands in place of one south of Lexington. 



Huron County. — Lane recognized the increase in the number of beaches in Huron County, 

 but he did not trace any of them continuously. The writer's studies in this county have been 

 confined mainly to the Port Huron morainic system and associated drainage channels, to the 

 Warren beach, and to the Algonquin and Nipissing beaches close along the present shore, and 

 these studies were made mainly in 1896, only four days having been spent in the county since 

 that time, mainly on the lower beaches. 



A series of beaches lies above the Algonquin in Gore, Huron, Bloomfield, and northwestern 

 Sigel townships. Nearly all are faint. One rather stronger than the rest was followed con- 

 tinuously for a number of miles in Huron and Bloomfield townships. Below this in Huron 

 and Gore townships there are 8 or 10 light gravelly ridges above the Algonquin. 



