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The geology of Kentucky formed beginning more than one billion years ago, in the Proterozoic eon of the Precambrian. The oldest igneous and metamorphic crystalline basement rock is part of the Grenville Province, a small continent that collided with the early North American continent.
USGS physiographic map of Kentucky showing the location of the Knobs. The Knobs Region or The Knobs is located in the US state of Kentucky. It is a narrow, arc-shaped region consisting of hundreds of isolated hills. The region wraps around the southern and eastern parts of the Bluegrass region in the north central to northeastern part of the state.
Kentucky's regions (click on image for color-coding information) Kentucky can be divided into five primary regions: the Cumberland Plateau in the east, which contains much of the historic coal mines; the north-central Bluegrass region, where the major cities and the state capital (Frankfort) are located; the south-central and western Pennyroyal Plateau (also known as the Pennyrile or ...
The Kentucky Geological Survey (KGS) is a department of the University of Kentucky that provides information on the geology of Kentucky, but has variously over the course of its history been a state level office, or a sub-division of a state combined geology and forestry department, at times its official State Geologist being prohibited by law from being associated with the University of Kentucky.
Regions of Kentucky, with the Pennyroyal Plateau shown in light brown (labeled as the Mississippi Plateau) The Pennyroyal Plateau or Pennyroyal Region, often spelled Pennyrile, [1] is a large physiographic region of Kentucky that features rolling hills, caves, and karst topography in general.
Fossils from the Ordovician are commonplace in the geologic formations which make up the Cincinnati Arch and are commonly studied along man made roadcuts. The Nashville Dome of Tennessee and the Jessamine Dome or Lexington Dome [ 1 ] of central Kentucky make up the central portion of the arch.
The Cumberland Plateau is a deeply dissected plateau, with topographic relief commonly of about 400 feet (120 metres), and frequent sandstone outcroppings and bluffs.. At Kentucky's Pottsville Escarpment, which is the transition from the Cumberland Plateau to the Bluegrass in the north and the Pennyrile in the south, there are many spectacular cliffs, gorges, rockhouses, natural bridges, and ...
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 dolomites in the Central Bluegrass Region.