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Western Cross Timbers

Ecoregion on Great Plains in TX, OK

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The rolling hills, cuestas, and ridges of the Western Cross Timbers are naturally covered by oak savanna, scrubby oak forest, and prairie and are underlain by interbedded sandstone, shale, and clay. Blackjack oak and post oak are dominant on sandy soils, but finer soils support grasses. Ecoregion 29c is physiographically and floristically unlike the Grand Prairie (29d) and Broken Red Plains (27i), and lithologically and physiographically distinct from the Arbuckle Mountains (29i). Tree height and density are less than in the moister Eastern Cross Timbers (29b). Today, land use is a mixture of livestock farming and cropland. Main crops are small grains, sorghum, and peanuts. Growing season is longer than to the north of the Arbuckle Mountains (29i). Oil production occurs.

— EPA

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