THE MIAMI SERIES OF SOILS. 5 
lows an irregular course to the north as far as the northern boundary 
of Gladwin County, thus extending around the shore line of Saginaw 
Bay at a distance varying from 25 to 50 miles inland. 
From the southwestern corner of Ogemaw County, Mich., the 
boundary of the area within which the soils of the Miami series are 
chiefly developed extends southwestward to the vicinity of Newaygo, 
Mich., and thence southerly near the shore of Lake Michigan to St. 
Joseph. It will thus be seen that a large total area in the southern 
part of the lower peninsula of Michigan is occupied by the soils of 
this series, although soils of the Coloma and other series derived 
from the glacial outwash are closely associated with the soils of the 
Miami series, and that in some localities, as along the southern 
boundary of Michigan between Hillsdale and Three Rivers and 
thence northward to Kalamazoo, the soils of the Miami series occupy 
only a small part of the territory. 
A disconnected area of soils of the Miami series is also encountered 
in the Traverse Bay region. It occurs as a narrow belt of elevated 
land along the eastern shore of Lake Michigan, extending from the 
vicinity of Manistee to Traverse City, Mich., and as a broader belt 
between Great Traverse and Little Traverse Bays. 
In eastern Wisconsin the western boundary of the area dominated 
by soils of the Miami series extends from the immediate vicinity of 
Beloit northwestward through Madison and thence northward to the 
vicinity of Portage, Wis. Thence it extends irregularly northeast- 
ward to a point west of Oshkosh. Nearly all of the. territory lying 
between this line and the western shore of Lake Michigan is occupied 
by the soils of the Miami series, although large areas of other im- 
portant soils are intimately associated with them. This section is 
separated from a more northern area of Miami soils by the glacial 
lake deposits and by other soils of glacial origin covering a consider- 
able area in the lowlands which surround the southern end of Green 
Bay, and extend south and west of Winnebago Lake. 
While the regions as outlined contain all of the larger areas of 
soils of the Miami series which have been mapped in the progress 
of soil-survey work, it is probable that small local areas of the soils 
of this series may be encountered to the west of the territory indi- 
cated. There is little possibility of any extensive areas occurring 
in more southern and eastern localities. It should be held in mind 
that a wide variety of other soils of different origin and of different 
characteristics is associated with the soils of the Miami series within 
the area where these soils constitute the most extensive types, and 
the most important in agriculture. The detailed soil surveys of the 
individual county areas only can show the relative extent of the 
Miami and other soils and their intricate geographical distribution. 
