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WEATHER
Semiarid Canadian Breaks
Ecoregion
in
NM
,
TX
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The Semiarid Canadian Breaks ecoregion is similar to the Canadian Breaks (26a) to the east in Texas with its deep valley trough and moderate-relief tablelands, but it is drier. This ecoregion also has large areas of Triassic mudstones and shales exposed, whereas Ecoregion 26a in Texas has a more homogeneous substrate of the Tertiary Ogallala Formation. The mudstones and shales create badlands that are not productive, and plant growth is sparse, increasing the look of aridity to the landscape. Some of the taller grasses and eastern riparian species found in the Canadian Breaks (26a) also tend to disappear towards the west in Ecoregion 26d as conditions become drier and the soils become less productive. The shrub and midgrass prairie vegetation includes one-seed juniper, sand sagebrush, skunkbush sumac, and yucca, along with sideoats grama, little bluestem, western wheatgrass, blue grama, buffalograss, galleta, and alkali sacaton.
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