1999  Meeks & Manger, p.141, upper Fayetteville shale,
           entire 57 feet thickness, bounded by exposed Wedington
           Sandstone Mb. at its base and exposed Pitkin Limestone
           at its top was excavated for Interstate Highway 540
           immediately west of West Fork, Washington Mountain (SW
           1/4, SW 1/4, sec. 29, T 15 N, R 30 W, West Fork 7 1/2
           quadrangle, Washington Co.