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1-2 miles northeast 40 feet accumulation of oil Allen County Altitude anticlinal folds anticline beneath the black Bethpage black Chattanooga shale black shale Bledsoe Creek brachiopod calcareous chert clay shale coral Corniferous Creek anticline crinoid depth Drake Creek drilled Driller's log Dry hole Dutch Creek exposed exposures feet thick fields of Allen Fork of Drake fossils Garretts Creek geologist gray Highland Rim Plateau Highland Rim portion Kentucky key beds Laurel limestone locality Louis limestone Louisville limestone Macon County miles north Mississippian Nashville Basin northwest of Sugar numerous oil and gas oil fields oil pool oil reservoir oil sand oil-bearing Ordovician outcrops overlying pay sands pebbles porosity porous Providence shale region reservoirs for oil Richmond group rocks sandstone serve as reservoirs shaly show of oil Silurian Silurian limestones species strata stream Sugar Grove summit Sumner County syncline Tenn Tennessee tion Trammel Fork Ulrich underlying upper Warsaw formation Westmoreland
Page 12 - out in this area, are exposed nearer to the center of the Nashville Basin. Near the bottom of the Ordovician system is a persistent sandstone which is regarded as equivalent to the extensive and widely known St. Peter sandstone of the upper Mississippi. basin, or the "Calciferous" of the southern Appalachian region. The St. Peter sandstone does not crop out within the
Page 35 - areas where prospecting for oil is warranted, there is much more likelihood of discovering new pools in localities where the structure is anticlinal than elsewhere. The search for new fields will therefore be expedited by a knowledge of the areas where anticlines or domes.
Page 16 - in Allen County and it is impossible to determine its lower limit in the well records. Trammel Fork, east of Adolphus, has cut 12 feet into the "Corniferous" without exposing its base. Long Creek has penetrated it to a depth of 40 feet, and Barren River near Holland has cut 56 feet below its top without exposing underlying strata. Presumably the formation
Page 12 - feet below the valley bottoms, and in Wayne County it is 1,500 to 1,600 feet below the base of the black Chattanooga shale. The JW Cook well, near Rhoda, Edmonson County, Ky., about 35 miles north of
Page 20 - half an inch to 1 inch thick, is composed of dark-brown or black sand grains and pebbles with numerous fragments of fossilized plant and animal organisms. Many of the sand grains and pebbles are phosphatic, and the rock gives off a strong bituminous odor when broken. The larger pebbles approximate a quarter of an inch in diameter, and some of them consist of
Page 13 - bryozoans, and the limestone is doubtless to be referred to the Richmond group, and possibly in whole or in part to the Fernvale formation. A collection of fossils from these beds along the west slope of Bledsoe Creek valley immediately above the Jackson Highway, between Bledsoe and Bransford, contains, according
Page 15 - of this formation are admirably suited to serve as reservoirs for oil and gas. This conclusion is further borne out by the fact that in a large number of the wells in
Page 20 - Ulrich for determination. Mr. Ulrich reports that in addition to the quartz pebbles there are also some phosphatized clay pebbles, but most of the lark-colored "pebbles" are of organic origin, being more or less beach-worn fossilized bones and teeth of large fishes. One of the teeth is of a species of
Page 18 - possibly represent the Hardin sandstone member of the Chattanooga shale as developed in southern Tennessee. It may be best observed in the channel of the stream that joins Bledsoe Creek at Bethpage, at the point, 4 miles west of Bransford, where this stream leaves the Highland Rim to flow southward into the Nashville Basin. The sandstone bed is there about