Geologic units in Bell county, Kentucky

Additional scientific data in this geographic area

Breathitt Formation, lower part (Pennsylvanian) at surface, covers 67 % of this area

lower part which includes Livingston Conglomerate Member of Lee Formation in eastern Rockcastle County

Lee Formation (Mississippian to Pennsylvanian) at surface, covers 14 % of this area

Lee Formation

Breathitt Formation, middle part (Pennsylvanian) at surface, covers 13 % of this area

Breathitt Formation, middle part

Pennington Formation, Newman Limestone, Fort Payne Chert, Grainger Formation, Sunbury Shale, Berea Sandstone, and Bedford Shale, undivided; Pennington Formation locally includes sandstone tongue of Lee Formation (Devonian to Pennsylvanian) at surface, covers 3 % of this area

Pennington Formation, Newman Limestone, Fort Payne Chert, Grainger Formation, Sunbury Shale, Berea Sandstone, and Bedford Shale, undivided; Pennington Formation locally includes sandstone tongue of Lee Formation

Alluvium (Pleistocene to Holocene) at surface, covers 2 % of this area

Alluvium; includes glacial deposits along the Ohio River and its tributaries west of Cannelton locks

Chattanooga and Ohio Shales, undivided (Devonian to Mississippian) at surface, covers 0.8 % of this area

Chattanooga and Ohio Shales, undivided; along and south of the Pine Fault

Lee Formation (Pennsylvanian - Mississippian) at surface, covers < 0.1 % of this area

Lee Formation (Campbell, 1893). Quartzarenite, conglomerate, sandstone, shale, siltstone, and coal. Quartzarenite, white, very-light- to light-gray, fine- to coarse-grained, locally conglomeratic, quartz-pebble conglomer te lenses, cross-bed ded, channel-fill deposits. Sandstone, feldspathic, micaceous, light-gray, fi ne- to medium-grained. Shale and siltstone, medium-dark-gray to dark-gray, interbedded; coal in several beds and zones. The quartzarenites terminate eastward by intertonguing and grading into fi ner grained and less quartzose rocks (Englund and DeLaney, 1966). Miller and Roen (1973) believe the lower three quartzarenites are Mississippian and intertongue with the Pennington Group. These die out northeastward from southwestern Lee County (Mill er, 1969). The quartzarenites in the upper part of the Lee tongue out or grade into fi ner clastic rocks of the Norton and Pocahontas Formations successively from highest to lowest southeastward (Englund, 1979; Miller, 1974). These quartzarenites consist of five tongues in northern Buchanan County (Lovett and others, 1992); but to the east only the lowest tongue exists (Whitlock, 1989; Nolde, 1989), and that grades eastward into sandstone in the New River Formation in eastern Buchanan, northeastern Russell, and western Tazewell counties. Formerly rocks east of the quartzarenites were considered Lee (Harnsberger, 1919; Virginia Division of Mineral Resources, 1963), but now are designated New River Formation (Englund, 1981) and correlative to the lower part of the Norton Formation. The Lee Formation thickens and truncates progressively older rocks northwestward (Miller, 1974). The intertonguing and unconformable relationship accounts for the great range in thickness for the Lee Formation. It ranges in thickness from 0 in southern Buchanan County (Meissner and Miller, 1981), to 1680 feet in Lee County (Miller and Roen, 1973).

Mississippian Formations Undivided (Mississippian) at surface, covers < 0.1 % of this area

Pennington Group, Bluefield Formation, Greenbrier Limestone, Maccrady Shale, and Price Formation; includes Newman Limestone, Fort Payne Chert, and Grainger Formation in western Lee County. Refer to individual units for descriptions.

Pennington Formation (Mississippian) at surface, covers < 0.1 % of this area

Highly variegated clay shale distinctive; contains siltstone beds and locally gray, fine-grained sandstone. Thickness 300 to 500 feet near Cumberland Plateau; maximum of about 1,250 feet to the east.