Fracture patterns and their origin in the Upper Devonian Antrim Shale gas reservoir of the Michigan basin: A review

Robert T. Ryder

Open-File Report 96-23

Figure 9 Structure contour map on top of the Lachine Member of the Antrim Shale in a four-township area in southern Otsego County, Michigan (Manger and others, 1990). See figure 8 for the location of the area

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