Breathitt Formation

USA Appalachian Kentucky Leslie county Breathitt Formation Fire Clay coal bed 11 samples... 

Ruppert, L.F., Hower, J.C. and Eble, C.F. (2005) Arsenic-bearing pyrite and marcasite in the fire clay coal bed, middle Pennsylvanian Breathitt Formation, eastern Kentucky. International Journal of Coal Geology, 63(Special Issue 1-2), 27-35. 

Figure 7 Replacement driven by force-of-crystal-Uzation is characterized by authigenic phases that develop euhedral faces that are not plausibly constmed as crystal growth within pore spaces (a) sphalerite replaces albitized detrital feldspar and adjacent portions of clay-rich matrix, Frio Formation, Oligocene, South Texas and (b) siderite crystal (s) attacks a detrital K-feldspar (K) in sandstone, Breathitt Formation, Pennsylvanian, eastern Kentucky.

Flint Clay parting in the Hazard No. 4 (Fire Clay) coal bed of the Breathitt Formation in Eastern Kentucky Guidebook, Geol. Soc. Am. Annual Meeting, Coal Div. Field trip. Coal and Coal-Bearing Rocks of Eastern Kentucky, Kentucky Geol. Survey, p. 49-54. 

Seiders, V.M., 1965, Volcanic origin of flint clay in the Fire Clay coal bed, Breathitt Formation, Eastern Kentucky in Geological Survey Research, Chapter D U.S. Geological Survey... 

Ferroan dolomite (including some ankerite, > 20 mol% FeC03) (Fig. 7) is widely distributed in the Breathitt Formation. One sample of relatively early... 

Esterle, J.S. and Ferm, J.C. 1986. Relationship between petrographic and chemical properties and coal seam geometry, Hance seam, Breathitt formation. Southeastern Kentucky. International Journal of Coal Geology, 6 199-214. 

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