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Late Quaternary sedimentation and paleoecologic history of Chaco Canyon, New Mexico

Citation

Hall, Stephen A, Late Quaternary sedimentation and paleoecologic history of Chaco Canyon, New Mexico: .

Summary

A stratigraphic and pollen analytical study of a thick sequence of alluvium at Chaco Canyon National Monument has provided a detailed history of late Quaternary alluviation, channel trenching, vegetation, and climate for the eastern Colorado Plateau. The alluvium at Chaco Canyon consists of five informal units, each separated by an erosional unconformity: Fajada (late Pleistocene), Gallo (7000 to 2400 B.P.), Chaco (2200 to 850 B.P.), Post-Bonito (600 B.P. to 1860 A.D.), and Historic (1935 to present). The Fajada paleosol occurs throughout northwestern New Mexico and is radiocarbon dated as older than 6,700 yr. Pollen analysis of the four younger alluvial units provides evidence for a mid-Holocene interval of aridity that occurs later [...]

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Author :
Hall, Stephen A

Communities

  • Upper Colorado River Basin

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Provenance

From Source - Mendeley RIS Export <br> On - Wed Sep 19 08:12:57 MDT 2012

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Title Citation Late Quaternary sedimentation and paleoecologic history of Chaco Canyon, New Mexico

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