An exploration oil well was drilled at the point shown on Fig. G-10 and the units encountered are shown on the structure section. The oil-bearing Eagle Bluff Limestone was encountered at a depth of 7200 ft. Using the arc method, draw a structure section. Indicate the point on the map where you, as a consulting geologist, would recommend drilling for oil. How deep must a well be drilled at this point to penetrate the upper surface of the Eagle Bluff Limestone?

Fig. G-10

Feet 0 1000 2000 3000 4000 5000 6000 7000 8000 +29 oil + Well Oil Well -13 Winters Dolomite Watkins Shale Twin Bridges Sandstone Stateline Limestone Turtle Creek Mudstone *Eagle 114 Bluff Limestone 37-4 734 38-4 1-33 +67 +11 --22 0 1000 - 2000 - 3000 +4000 - 5000 6000 -7000 8000