The loess covers both the watersheds and the valleys. [Please select]
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Its feeders reach the Andes, draining watersheds within a hundred miles of the Pacific ocean. [Please select]
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Streams from which we report hybrids probably were affected by overgrazing of their watersheds; overgrazing was unusually severe in the drought. [Please select]
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It dominated two watersheds, was accessible only on one side, and then by a ridgeway; from it the valley roads and rockstrewn hillsides could be seen for many leagues. [Please select]
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