Field notes, central Kentucky, 1898
Page 19
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Transcription
bedding. Where not brecciated it has a more distinctly blue color and often is well bedded. At one point in the cut the middle of this bed is well bedded and shows fun ctidal markings. The weath- ered surface shows numerous small quartz concretions. Crinoid stems and coals oc- cur in the rock. Fish teeth apparently occur, but they are not well preserved. The total thickness of De-vonian limestones ac-cording to these notes is nearly 20 feet. Only 15 to 20 feet of black shale are exposed in the cut, but in the hill south-west of the cut more black shale is seen. About 60 feet above the base of the black shale, near the top of the hill, is a layer of phos-phatic nodules or con-cretions including Estheria? and other fossils. This layer can here be made out with difficulty. But at the Blue Lick, just north of Lionetta Springs, at the north-western edge of the town, this nodule bedger is well exposed. It is only 2 to 4 inches thick but the nodules are very abundant. The nodules occur at the top of the very black shale, and are overlaid by many feet of a pure greenish thin shale. This change in color is a guide locating the phos-phatic nodule bed. The nodules can't contain a variety of fossils, and was explori-ted about 3 or 4 years ago by a Princeton student. About 15 feet above the nodule bed is a very red, ferriferous, sandy bed, 2 to 4 inches thick, appar-ently also fossiliferous at times. The highest exposures at the Blue Lick are sandy contain sandy beds with good fossils, Othinea, Spirifera, etc. Blue Lick Blue Lick 32