THE 
AMERICAN GEOLOGIST. 
Vol. XIV. NOVEMBER, 1894. No. 5. 
THE LIMIT OF POSTGLACIAL SUBMERGENCE IN 
THE HIGHLANDS EAST OF GEORGIAN BAY. 
By F. B. Taylor, Fort Wayne, Ind. 
(Plate VII.) 
The region described in this paper extends from the south- 
west end of lake Simcoe through the highlands east of Geor- 
gian bay to the hills south of lake Nipissing. After making 
some preliminary observations at points farther south, but 
which do not relate to the particular subject of this paper, the 
exploration was begun at Barrie on the shore of lake Simcoe. 
Most of the observations were made in August, 1893, when I 
was accompanied by Dr. Pearce, who had been with me in the 
previous trips to Green bay and the coast of lake Superior 
(described in the last May and June numbers of the American 
Geologist). I returned alone in September on my way to the 
Adirondacks and revisited some of these places and also 
explored some new ones. 
Barrie. Within the limits of this town and the village of 
Allandale, which adjoins it on the south, the Algonquin beach 
of Dr. J. W. Spencer* was found clearly developed. In the 
eastern part of Barrie the beach is a cut terrace at the back 
of the lots on the north side of Blake street. It extends in 
this form westward through the town to a point east of the 
court house, where a valley opens to the northwest. Here it 
changes to a gravelly beach ridge and projects about an eighth 
of a mile westward along the north side of Collier street as a 
high, narrow spit. This spit is in the old part of the town. 
* "Deformation of the Algonquin Beach, and Birth of Lake Huron," 
Am. Jour. Sci., III. vol, xli, pp. 12-21, with map, Jan., 1891, 
