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  2. Illinois River (Arkansas–Oklahoma) - Wikipedia

    en.wikipedia.org/wiki/Illinois_River_(Arkansas...

    It passes under Arkansas 16 again and Arkansas Highway 59 to the southeast of Siloam Springs. The stream leaves Arkansas at the southwest corner of Benton County and enters Lake Frances in Oklahoma. [7] It flows west into northeast Oklahoma, then southwest and south through the mountains of eastern Oklahoma, past Sparrowhawk and Tahlequah.

  3. Ozarks - Wikipedia

    en.wikipedia.org/wiki/Ozarks

    A rural Ozarks scene. Phelps County, Missouri The Saint Francois Mountains, viewed here from Knob Lick Mountain, are the exposed geologic core of the Ozarks.. The Ozarks, also known as the Ozark Mountains, Ozark Highlands or Ozark Plateau, is a physiographic region in the U.S. states of Missouri, Arkansas, and Oklahoma, as well as a small area in the southeastern corner of Kansas. [1]

  4. Verdigris River - Wikipedia

    en.wikipedia.org/wiki/Verdigris_River

    From just north of Catoosa, Oklahoma to the river's confluence with the Arkansas, barge traffic is supported on the river via the McClellan-Kerr Navigation System. This consists of a series of locks and dams on the Arkansas and the Verdigris rivers; this system enables commercial navigation between the Tulsa, Oklahoma , area and the Mississippi ...

  5. List of principal and guide meridians and base lines of the ...

    en.wikipedia.org/wiki/List_of_principal_and...

    Primarily from the United States Government Printing Office Style Manual. [1] State names usually signify only parts of each listed state, unless otherwise indicated. Based on the BLM manual's 1973 publication date, and the reference to Clarke's Spheroid of 1866 in section 2-82, coordinates appear to be in the NAD27 datum.

  6. Arkansas River Valley - Wikipedia

    en.wikipedia.org/wiki/Arkansas_River_Valley

    The Arkansas River Valley, also known as the Arkansas Valley, is a region in Arkansas defined by the Arkansas River in the western part of the state. Generally defined as the area between the Ozark and Ouachita Mountains, [1] the River Valley is characterized by flat lowlands covered in fertile farmland and lakes periodically interrupted by high peaks.

  7. Arkansas River - Wikipedia

    en.wikipedia.org/wiki/Arkansas_River

    The Kansas–Oklahoma Arkansas River Basin Compact was created in 1965 to promote mutual consideration and equity over water use in the basin shared by those states. The Kansas–Oklahoma Arkansas River Commission was established, charged with administering the compact and reducing pollution.

  8. Arkansas Valley (ecoregion) - Wikipedia

    en.wikipedia.org/wiki/Arkansas_Valley_(ecoregion)

    The Arkansas Valley is a Level III ecoregion designated by the Environmental Protection Agency (EPA) in the U.S. states of Arkansas and Oklahoma.It parallels the Arkansas River between the flat plains of western Oklahoma and the Arkansas Delta, dividing the Ozarks and the Ouachita Mountains with the broad valleys created by the river's floodplain, occasionally interrupted by low hills ...

  9. Geography of Oklahoma - Wikipedia

    en.wikipedia.org/wiki/Geography_of_Oklahoma

    Partial plains interrupted by small mountain ranges like the Antelope Hills and the Wichita Mountains dot southwestern Oklahoma, and transitional prairie and woodlands cover the central portion of the state. The Ozark and Ouachita (pronounced Oh-Wa-Sheet-ah) Mountains rise from west to east over the state's eastern third, gradually increasing ...