This epoch of relative uplift and active erosion is sometimes called the Sierran or Ozarkian epoch. [Please select]
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Of the three sierran faunas, those of the Sierra Madre Oriental and the Sierra de Tamaulipas have most in common. [Please select]
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Forming a hiatus between the Pacific and the desert slope is the Sierran Biotic Province consisting of coniferous forests on the crest of the range. [Please select]
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Therefore the shrews were able to traverse the Great Basin, while the Sierran red squirrels were of necessity derived from the coastal population. [Please select]
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