Geology of the Clay Deposits in the Olive Hill District, Kentucky

Cambridge University Press (CUP) - Tập 7 - Trang 178-194 - 1958
Sam H. Patterson1
1U. S. Geological Survey, Beltsville, USA

Tóm tắt

AbstractTHE Olive Hill fire clay bed of Crider (1913) is the principal source of the raw material used in the refractory industry of eastern Kentucky. The bed is a discontinuous underclay from 1 to 20 ft above a prominent unconformity which separates Mississippian and Pennsylvanian rocks. Upper Mississippian rocks consist of ten marine limestone and shale units all truncated by the unconformity. Pennsylvanian rocks are chiefly: (a) massive deltaic sandstone; (b) cut-and-fill deposits of shale, siltstone and sandstone which contain several beds of coal and underclay including the Olive Hill fire clay of Crider (1913); and (c) dark-gray shale beds.The Olive Hill fire clay of Crider consists of approximately one-third flint clay, two-thirds semiflint clay, and minor amounts of plastic clay. The clay mineral content ranges from nearly pure kaolinite to kaolinitic clay containing about 40 percent illite and mixed-layer clay. The kaolinite ranges from highly crystalline to very poorly crystalline “fireclay” kaolinite. The degree of crystallinity of the kaolinite and hardness of the clay vary inversely with the amount of illite and mixed-layer clay present. The nearly pure kaolinite is believed to have formed by removal of silica and alkalies from mixtures of kaolinite, illite and mixed-layer clay by leaching shortly after deposition.An isopach map shows that Crider’s Olive Hill fire clay occurs in irregular, lens-shaped deposits. Fossil plant rootstocks with rootlets attached in the clay clearly indicate it supported plant growth. The overlying coal and presence of some organic material in the clay suggest that the Olive Hill fire clay was deposited under a reducing environment in swamps.

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Tài liệu tham khảo

10.1086/626369

Keller, 1954, Clays and Clay Minerals, 7

10.1130/0016-7606(1955)66[159:SOSCON]2.0.CO;2

Reed, 1958, The mineral industry of Kentucky, Minerals Yearbook, 3, 493

Twenhofel, 1939, Principles of Sedimentation, 610

10.1130/0016-7606(1948)59[91:COTMFO]2.0.CO;2

10.1130/0016-7606(1958)69[363:POU]2.0.CO;2

Bates, 1955, Clays and Clay Minerals, 395, 1

Brindley, 1951, X-ray Identification and Crystal Structures of Clay Minerals, 32

Grim, 1953, Clay Mineralogy, 384

McFarlan, 1956, Some old Chester problems—correlations along the eastern belt of outcrop, Kentucky Geol. Surmy Bull., 20, 36

Crider, 1913, The fire clays and fire clay industries of the Olive Hill and Ashland districts of northeastern Kentucky, Kentucky Geol. Survey, ser. IV, I, 589

10.2113/gsecongeo.51.6.541

McConnell, 1956, Study of some chemically analyzed Ohio clays by x-ray diffraction and differential thermal analysis, Ohio J. Sci., 56, 275

McMillan, 1956, Petrology of the Nodaway underclay (Pennsylvanian), Kansas, Kansas Geol. Survey Bull., 119, 187

10.1086/626346

Wilson, 1957, Paleogeography during deposition of Pennsylvanian sand bodies in Tennessee, Bull. Geol. Soc. Amer., 68, 1812

Brindley, 1947, An x-ray study of some kaolinitic fireclays, Trans. Brit. Ceram. Soc., 40, 49

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Cambridge University Press (CUP)

Tập 7

178-194

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