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can ice sheet invaded Indiana it sent forward advance columns along the 
lines of low depression. Of these lines, the principal ones, a southward- 
moving lobe from the Lake Michigan depression, a southwestward-moving 
lobe from the Saginaw-Huron depression, and a west southwestward-movyv- 
ing lobe from the Erie depression, converged in northern Indiana, became 
confiuent and moved southward to central Indiana. The climate then 
became warmer and the ice sheet began its retreat in an order the 
inverse of its advance. It melted away on the divides first and persisted 
much later in the lines of depression. Immense quantities of water from 
the melting ice, the accumulated precipitation of countless ages set free 
from its long bondage by the Frost King gathered in lakes in the depres- 
sions of the vacated regions, or swelled to immense size the streams that 
ran from the ice front. A new topography was imposed upon the region 
of glacial action. It is as a detail in the general scheme that the region 
described finds its explanation. 
The converged lobes before mentioned moved down to the Shelbyville 
moraine extending from northern Vigo County northeast through Parke, 
east through Putnam and thence southeast. This moraine extends as a 
continuous plain, trenched by streams, bearing on its surface the weak 
dome-shaped swells that mark it as morainic in character to the northern 
part of Montgomery County, extending northwestward to and across the 
Wabash, which was one of its great terminal drainage lines, into which 
fiowed Raccoon and Sugar creeks, mighty streams from the ice border 
further east. As the ice retreated to the present divide between Sugar 
and Coal creeks, the slope descending to the north was gradually uncoy- 
ered, and a lake began to form along the southern border of the glacier, 
which overflowed south across the divide by Potato, Lye and Black creeks 
to Sugar Creek. Later, Coal Creek took its way west along the ice border 
and finding an outlet stream running south, or a southward bend in the ice 
front, it turned south at the elbow. This being lower than the outlets 
further east caused their abandonment, the water flowing through the 
sags in the Independence-Darliugton Kame Moraine. This moraine is a 
weak frontal moraine of the Erie lobe and it was laid down in the lake 
and perhaps afterwards much dissected by wave action. The ice sheet 
halted for a long time at the West Point, or what is better known as the 
High Gap Ridge, the drainage then being by Flint Creek along its front 
across the divide to Shawnee, thence west into the Wabash, the terminal 
drainage stream of the Michigan lobe, the Wea-Coal Creek outlet being 
