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The Lexington Limestone is a prominent geologic formation that constitutes a large part of the late Ordovician bedrock of the inner Bluegrass region in Kentucky. Named after the city of Lexington , the geologic formation has heavily influenced both the surface topography and economy of the region.
The main area of Jurassic deposition in Yorkshire was the North York Moors. Lower Jurassic At the beginning of the Jurassic period shales, clays and thin limestones and sandstones were deposited in a shallow sea.
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, provides another controlling factor. Movement along the fault has been largely ...
The Camp Nelson Limestone along the Kentucky River gorge between Frankfort and Boonesboro dates to the Middle Ordovician and is the oldest rock exposed at the surface in the state. Additional mudstone and shale formation from the Late Ordovician indicates a shift to a shallower sea, which supported extensive marine life.
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Carboniferous Limestone – Limestone deposited during the Dinantian Epoch of the Carboniferous Period; Coquina – Sedimentary rock that is composed mostly of fragments of shells; Coral rag – Limestone composed of ancient coral reef material; Chalk – Soft carbonate rock; Fossiliferous limestone – Limestone containing fossils
The Boyle Group, also known as the Boyle Limestone or Boyle Dolomite is a geologic group found in Kentucky. It dates back to the Devonian period. The Boyle is bound by two unconformities. The one at the top is the Taghanic unconformity and the one at the bottom is the Wallbridge Unconformity. The New Albany Shale uncomfortably lies on top of ...
North Vernon Formation and Sellersburg Limestone: Overlies: Clear Creek Chert and Louisville Limestone: Thickness: 20 feet (6.1 m) at Louisville, KY, [2] 0 to 200 feet (0 to 61 m) in southwest Indiana [1] Lithology; Primary: limestone: Location; Region: Cincinnati Arch: Country: United States: Extent: Indiana, Kentucky: Type section; Named for ...