The Second Lake Ahjouqidn. — Taylor. 105 
exceptional strength of a beach at an altitude of about 45 
feet on Mackinac island was briefly mentioned. It is the one 
upon which the higher parts of the village are built. It ap- 
pears again in the ridge near British landing, as mentioned 
in the sixth paper; and it is continued in the great cut ter- 
race which extends across the north end of the island. 
Passing over to the north mainland, it is this same beach 
which disjDlays the immense gravel beds so conspicuous at St. 
Ignace and all around the flanks of Gros Cap. It was the 
beach drift of this time that shut in the ponds and swamps 
northwest of St. Ignace, and formed Brevoort lake near the 
Michigan shore twelve miles northwest. This beach is also 
well developed along the shore northward from St. Ignace, 
and it was the wave-cutting of that time which made the 
steep precipice of St. Louis rock two miles nortii. 
On the south side of Mackinac straits it appears again as the 
lower terrace at McGulpin's point. The lighthouse is built 
upon it and it appears as a cut terrace at the foot of a steep 
bluff extending around the entire point to Cecile l)ay ; and 
still farther to the long Waugoshance point, M'hich is partly 
a spit of this age. Round island and Bois Blanc southeast of 
Mackinac rise only a little above it and their tops look as 
though they had been largely planed down to that level. The 
tops of the Cheneaux islands are apparently limited by the 
same plane. 
Still farther south in the vicinity of Little Traverse bay 
this beach reappears in magnificent form, mainly as a cut ter- 
race. But its hight there is reduced to about 25 feet above 
the lake. It is upon this shelf that the villages of Harbor 
Springs and Wequetonsing are built. The blutf at its back is 
75 feet high and very steep. The long spit which makes the 
beautiful little harbor there was probably begun at that time, 
although it has been largely extended since. Across the bay 
this beach appears at Petoskey as the lower terrace down 
near the lake, and again at Bay View in the same relation. In 
the eastern part of the latter village and beyond it becomes 
very wide with a high steep blufl' at its back. But its strength 
of development becomes greatest at the head of the bay. The 
breadth between the higher hiiuls at that place is upwards of 
two miles. The old channel tlin»ugli to the east was not deep. 
