Cannel coal (upper Cannel City-Amburgy Coal Zone, Pikeville Formation, Middle Pennsylvanian; Jackson North roadcut, Breathitt County, Kentucky, USA) 3 : 無料・フリー素材/写真
Cannel coal (upper Cannel City-Amburgy Coal Zone, Pikeville Formation, Middle Pennsylvanian; Jackson North roadcut, Breathitt County, Kentucky, USA) 3 / James St. John
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | Cannel City-Amburgy Coal Zone in the Pennsylvanian of Kentucky, USA.This exposure is part of a relatively new roadcut along new Route 15, north of the town of Jackson, Kentucky, USA. The exposure has Pennsylvanian-aged cyclothemic sedimentary rocks of the Breathitt Group (formerly the Breathitt Formation). Shown above is the upper part of the Cannel City-Amburgy Coal Zone. The black-colored horizon is cannel coal, a scarce, fossil spore-rich variety of coal. Cannel coal is hard, has a velvety to satiny luster, little to no stratification, and a conchoidal fracture.This cannel coal horizon was economically significant in the early 20th century, and the unit was extensively mined in eastern Kentucky. Published info. about the locality shown above (see Greb & Eble, 2014) indicates that the cannel coal is 33% ash and 1.6% sulfur. The macerals in the cannel coal include liptinite (~47%), inertinite (~31%), and vitrinite (~22%). Plant microfossils from the cannel coal are principally lycopsid tree spores and calamite sphenophyte spores. The cannel coal horizon itself represents an ancient lake formed in a basement fault-generated depression.The light gray-colored, cliff-like unit at the top is a channel sandstone. The gray to brown unit below the cannel coal is shale.Stratigraphy: upper Cannel City-Amburgy Coal Zone, upper Pikeville Formation, Breathitt Group, lower Atokan Series (Duckmantian), lower Middle PennsylvanianLocation: Jackson North outcrop - large roadcut on the eastern side of new Rt. 15, just south of southbound old Rt. 15-new Rt. 15 split, north of Jackson, north-central Breathitt County, eastern Kentucky, USA (37° 34’ 53.95” North, 83° 23’ 07.99” West)------------------Reference cited:Greb & Eble (2014) - Cannel coals of the Cannel City-Amburgy Coal Bed (Pikeville Formation, Middle Pennsylvanian); evidence for possible fault-generated lakes. Geological Society of America Abstracts with Programs 46(6): 604. |
| 撮影日 | 2015-01-08 09:12:55 |
| 撮影者 | James St. John |
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