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Marseilles moraine
The Marseilles Moraine is a terminal moraine that encirles the southern tip of the Lake Michigan in North America. It begins near Elgin, Illinois and extends south and west of Greater Chicago, turning eastward to south of the lake in Knakakee and Iroqouis counties, entering Indiana. It formed during the Wisconsin glaciation. The glacier had been in retreat when it stopped for an extented period of time, depositing glacial till and sandcreating the hills of the moraine.
==Distribution==
The Marseilles moraine was preceded by the Bloomington morainic system. The name is taken from the village of Marseilles, located where the Illinois River cuts through the moraine. The moraine is readily traced as far north as South Elgin, south of the city of Elgin, where it is lost in a composite of other materials.〔The Illinois Ice Lobe; Frank Leverett; U.S. Geological Survey, Monograph, #38; Government Printing Office; Washington, D.C.; 1899, pg 290-316〕 For south it combinew with a till ridge called the Minooka Ridge. This follows the east side of Fox River, past St. Charles, Geneva, Batavio, and Aurora. The east side of each city occupies the outer face of the moraine. The width of the belt is or . The moraine continues south along the line of Will and Kendall counties. It runs about or beyond the river. The Marseilles moraine turns west, at the bluff between Oswego and Yorkville. The Minooka Ridge continues southward to the Illinois River. The Marseilles moraine follows nearly the southeast bluff of Fox River to the mouth of the stream, its outer border being nowhere more than and usually less than from the stream. The width in Kendall County is only 2 or 3 miles, but increases to 5 or 6 miles in northeastern LaSalle County, near the north bluff of the Illinois River.〔
At the Illinois Valley it changes from southsouthwest to a south-southeast course. It maintains a to width through southeastern Lasalle and northern Livington counties. It is associated with Farm Ridge, in Livingston County. The Farm Ridge is an inner ridge of the Bloomington system. In the vicinity of Odell the moraine turns eastward, and near the line of Livingston and Ford counties takes a course northeast, in broad curve of or wide. Reaching the vicinity of Ste. Anne where it turns southeast.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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