Original type log, Amerada Petroleum Corporation, H.O. Bakken No. 1, SW NW Sec. 12, T.157N., R.95W., North Dakota (modified after LeFever, 1991).
Original type log, Amerada Petroleum Corporation, H.O. Bakken No. 1, SW NW Sec. 12, T.157N., R.95W., North Dakota (modified after LeFever, 1991).