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Kentucky River Palisades
The Kentucky River Palisades are a series of steep, scenic gorges and limestone outcroppings that stretch for approximately 100 mi (160 km), along the Kentucky River in central Kentucky in the United States.
==Geology==
The Kentucky River Palisades is a cliff-lined entrenched meander. The meanders originally formed on the Lexington Peneplain. As sea-level lowered during the Quaternary Period, base level lowered and the meander-form river eroded downward into Ordovician-age limestones, shales, and dolostones in the Central Bluegrass Region. The Lexington Limestone, which covers most of this area, is composed of interbedded shales and thin limestones. Erosion of these lithologies usually form gentle to moderate slopes. However, the Kentucky River Fault system, part of which runs along the Palisades provided another controlling factor. Movement along the fault was largely vertical. Strata on the north side of the fault were raised several hundred feet relative to those on the south side. The thick dolostones and limestones of the High Bridge Group (Tyrone, Oregon, and Camp Nelson formations) are resistant to erosion and tend to be cliff forming. As downward erosion hit the Camp Nelson Group rocks, meander-shaped cliffs were formed. Daniel Boone's Fort Boonesborough was sited close to the fault and the eastern end of the Palisades.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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