| Carboniferous volcanism, occurring at converging plates margins, both at the Appalachian and at the Ouachita margins, was decidedly not tholeiitic. |
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| Environmental variables interact across spatial scales to structure trichopteran assemblages in Ouachita Mountain rivers. |
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| Another knife blade, almost opaque, is made from Novaculite, which is found in the Ouachita National Forest area of Arkansas. |
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| Sharp then executed a third consecutive onside kick so Ouachita could run out the clock. |
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| Additional distributional records of the Ouachita Mountain crayfish, Procambarus tenuis, in Arkansas and Oklahoma, with notes on ecology and natural history. |
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| Meanwhile, South America had collided with southern Laurentia, closing the Rheic Ocean and forming the southernmost part of the Appalachians and Ouachita Mountains. |
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| The Ozark Plateau is a broad uplifted area which resulted from the Permian Ouachita Orogeny to the south in the states of Arkansas, Oklahoma and Texas. |
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