This part of Kentucky is relatively flat lying, with numerous lakes, ponds, sloughs, and swamps. Since it is made up of mostly sediment, the soils are easily eroded. . The Jackson Purchase is the lowest spot in the commonwealth at only 260 feet above sea level.. ID: 658907
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The Jackson Purchase is located in western Kentucky and is the northeastern part of the upper Mississippi River Valley. This part of Kentucky is relatively flat lying, with numerous lakes, ponds, sloughs, and swamps. Since it is made up of mostly sediment, the soils are easily eroded. The Jackson Purchase is the lowest spot in the commonwealth at only 260 feet above sea level.Slide2
(also know as Pennyroyal & Mississippian Plateau)
Region consists of a limestone plain characterized by tens of thousands of sink holes, sinking streams,
valleys, springs, and caverns. The term "karst" is used to define this type of terrain.
The limestones are soluble (i.e. will dissolve) under the right conditions, which means they can easily be eroded by waters moving through the ground. These groundwaters can form miles of passages beneath the surface, from tiny paths only inches wide, to large caverns and rooms more than 100 feet wide. The Mammoth Cave-Flint Ridge cave system is the longest cave in the world (by far), and is formed in Mississippian-age limestones in the Mississippian Plateau Region. Farmland in the Pennyrile region supports many different crops and livestock.Slide3
Western Coal Fields
This area is the southern edge of a larger geologic feature called the Illinois or Eastern Interior Basin, which includes the coal fields in Indiana and Illinois. It includes Pennsylvanian sandstones.The border of the Western Kentucky Coal Field along the Pennyrile area is commonly marked by long, steep slopes, because thick Pennsylvanian-age sandstones are resistant to erosion.
This area is rich in many natural
"The Knobs" is a region that borders the Bluegrass. It consists of hundreds of isolated, steep sloping, often cone-shaped hills formed by many years of erosion. Many of the knobs are still capped by limestones or sandstones. That are resistant to erosion.Slide5
The Bluegrass physiographic region is restricted to the central part of the commonwealth where aged limestone rocks are exposed at the surface. Weathering of the limestones produces sink holes, sinking streams, springs, caves and soils. The soils are fertile because the limestones contain phosphate minerals, which are natural fertilizers.
The inner part of the Bluegrass has gently rolling hills and rich, fertile soils, which are perfect for raising horses and cattle.
The outer Bluegrass has deeper valleys, with little flat land, because the bedrock is more easily eroded.Slide6
Eastern Coal Fields
The Eastern Kentucky Coal Field is part of a larger region called the Cumberland Plateau (which extends from Pennsylvania to Alabama.) The manner in which the sandstones in this region weathered and are eroded resulted in sheer cliffs, steep-walled gorges, rock shelters, waterfalls, natural bridges and arches, and some of the most scenic areas in Kentucky.The interior of the Eastern Kentucky Coal Field is dominated by forested hills and V-shaped valleys. In general, the elevations of the hills are highest in southeastern Kentucky where the highest elevation in the State, 4,145 feet (before mining), was at Black Mountain in Harlan County.
Pine Mountain is another important physiographic feature of the region. Pine Mountain is best described as a 125-mile long ridge that extends from southwest of Jellico, Tennessee to Elkhorn City, Kentucky. It is 3,200 feet high in Letcher County.Slide7Slide8