<Tr> <Th_colspan="2"> Geology </Th> </Tr> <Tr> <Th> Age of rock </Th> <Td> Paleozoic to Proterozoic </Td> </Tr> <P> The Ozark Plateaus, simply referred to as the Ozarks, are a mountainous region in the U.S. states of Arkansas, Missouri, Oklahoma, and Kansas . The Ozarks cover a significant portion of northern Arkansas and southern Missouri, extending from Interstate 40 in Arkansas to the suburbs of St. Louis . A portion of the Ozarks extends into northeastern Oklahoma and extreme southeastern Kansas . </P> <P> Though often referred to as the Ozark Mountains, the region is technically the Ozark Plateaus . There are, however, two mountain ranges within the Ozarks: the Boston Mountains of Arkansas and St. Francois Mountains of Missouri . Buffalo Lookout, the highest point in the Ozarks, is located in the Boston Mountains . Geologically, the area is a broad dome with the exposed core in the St. Francois Mountains . The Ozarks cover nearly 47,000 square miles, making it the most extensive highland region between the Appalachians and Rockies . Together with the Ouachita Mountains, the area is known as the U.S. Interior Highlands . </P>

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