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The Ozarks cover a significant portion of northern Arkansas and southern Missouri, extending from Interstate 40 in Arkansas to the suburbs of St. A portion of the Ozarks extends into northeastern Oklahoma and southeastern Kansas.There are two mountain ranges within the Ozarks: the Boston Mountains of Arkansas and the St. Buffalo Lookout, the highest point in the Ozarks, is located in the Boston Mountains.In the later 17th and early 18th centuries, French cartographers mapped the Arkansas and Mississippi Rivers.The large, top most arc or bend in this part of the Arkansas River was referred to as the aux arcs—the top or most northern arc in the whole of the lower Arkansas.Both are rife with karst topography and form long, flat plains.
Many Ozark waterways have their headwaters in the uplands of the Boston formation, including the Buffalo, King’s, Mulberry, Little Red and White rivers.
A major unconformity in the region attests that the Ozarks was above sea level for several hundred million years from the time of the volcanism in the Precambrian until the mid-Cambrian with an erosionally produced relief of up to 1500 feet.
The seas encroached during the late Cambrian producing the Lamotte Sandstone, 200 to 300 feet (61 to 91 m) thick, followed by carbonate sedimentation.
Although much of the Springfield Plateau has been denuded of the surface layers of the Boston Mountains, large remnants of these younger layers are present throughout the southern end of the formation, possibly suggesting a peneplain process.
The Saint Francois Mountains in the northeastern Ozarks are the eroded remnants of an ancient range which form the geological core of the highland dome.
Geographic features include limestone and dolomite glades, which are rocky, desert-like area on hilltops.