1 6 The American Geologist. July, 1899 
It is a finely formed landlaid moraine on the thumb and is 
easily traceable continuously in its waterlaid form across both 
the St. Clair and Saginaw valleys. Indeed, in both these val- 
leys it may be taken as a type specimen of a waterlaid moraine. 
It runs south from Ubly, forming the divide between Black 
river and lake Huron, and passes close west of Port Huron, 
its crest crossing the St. Clair river about a mile north of St. 
Clair Springs. Three miles northeast of Ubly it turns an anele 
of 75° or 8o° and runs thence southwest along the north side 
of Cass river, forming the divide between it and Saginaw bay. 
Then it curves westward, passing through the city of Saginaw, 
and then northward and northeast to the An Sable river, mak- 
ing the entire circuit of the bay about twenty miles back froi:! 
the present shore. Its influence upon the drainage is remark- 
able and is well shown in the courses of the Maitland and 
Sable rivers in Ontario and the Black, Cass, Tittibawassee and 
An Sable in Michigan. Where it crosses the last named river 
it turns toward the northwest and passes farther inland. This 
has been called the Port Huron or Port Huron-Saginaw mo- 
raine. There appears to be no other moraine between it and the 
present lake shore in Michigan until after passing north of the 
An Sable river. 
Another strongly developed moraine appears to be cut off 
at the shore in the vicinity of Harrisville and Alcona and runs 
thence northwest. This has been called the Alcona moraine. 
Farther north another, which runs in the same direction from 
near Alpena through Hagenville and past Rogers City on the 
south, is called the Hagenville moraine. 
Another moraine north of the straits of Mackinac runs 
through Les Chenneaux islands and a range of hills about 
five miles north of Hessel, its course from the shore being 
about west-northwest. It is not known at present whether 
this is the next moraine in series or whether there may not be 
another between it and the Hagenville. No evidence of such 
a moraine, however, has yet been found. Two other moraines 
farther north are doubtfully identified, one passing through 
Drummond, Cockburn and St. Joseph islands and the other 
skirting the shore a few miles back of the North channel of 
lake Huron. Not counting the last three, the series is be- 
lieved to be complete as far as the Hagenville moraine, which 
is the fifth north of the Toledo, counting the latter as first. 
