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 8 Structure contour map on top of the Traverse Group across a 28-township area of the Antrim Shale gas-producing trend in Otsego County and adjoining Antrim and Montmorency Counties, Michigan. Also shown is the average gas productionr ate (MCFGPD) per quarter township (Decker and others, 1992).

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U.S. Department of the Interior, U.S. Geological Survey
URL: http://pubs.usgs.gov/of/1996/of96-023/figure8.htm
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