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Broken Red Plains

Ecoregion on Great Plains in TX, OK

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The grass- and shrub-covered Broken Red Plains ecoregion is mostly underlain by Permian-age sandstone and shale. It is more irregular than Ecoregions 27d, 27h, and 27m, but has much less relief than Ecoregion 27k. Upland natural vegetation is mesquite – buffalograss. The density of mesquite increases southward into Texas, where its prevalence may be the result of grazing pressure and climate. Ecoregion 27i lacks the upland tree cover found on sandier soils in Ecoregions 27o, 29b, and 29c; native vegetation is also distinct from Ecoregions 27d, 27k, 27l, 27q, and 29h. Today, Ecoregion 27i is a mosaic of rangeland and cropland; rangeland is more common than in Ecoregions 27d, 27h, and 27m. Its growing season is longer than north of the Wichita Mountains in Ecoregion 27d.

— EPA

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Broken Red Plains

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