Economics and the 1995 National Assessment of U.S. Oil and Gas Resources
 Emil D. Attanasi

  U. S. Geological Survey Open-File Report 95-75-M

Figure 4. Assessed continuous-type plays of the USGS 1995 National Assessment for which the predominant reservoir rock is sandstone, siltstone, shale, or chalk. Figure 4A shows gas plays and figure 4B shows oil plays. Tables B-2 and B-3 of Appendix B list provinces and play names associated with play numbers.

Figure 4A. - Gas Plays

Figure 4B. - Oil Plays

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