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Late Quaternary arroyo formation and climate change in the American Southwest

Michael R. Waters and C. Vance Haynes
Late Quaternary arroyo formation and climate change in the American Southwest
Geology (Boulder) (May 2001) 29 (5): 399-402


Arroyos, entrenched ephemeral streams that form in desert environments, first appeared in the arid and semiarid American Southwest after 8000 (super 14) C yr B.P. For at least 7 k.y. prior to that time, climate, vegetation, and groundwater conditions were not conducive for arroyo formation along the floors of desert valleys. After a hiatus in arroyo formation, the frequency of arroyo cutting and filling increased dramatically after 4000 (super 14) C yr B.P. The early Holocene arroyos and increased frequency of arroyo incision after 4000 (super 14) C yr B.P. are related to the establishment and changes in postglacial vegetation, climate, and groundwater conditions. As a result, arroyo sequences preserve a record of large-scale climate change and small-scale climatic perturbations that occurred during the Holocene. Human modification of valley flood plains is an additional factor that contributed to mid-nineteenth and early twentieth century arroyo cutting.

ISSN: 0091-7613
EISSN: 1943-2682
Serial Title: Geology (Boulder)
Serial Volume: 29
Serial Issue: 5
Title: Late Quaternary arroyo formation and climate change in the American Southwest
Affiliation: Texas A&M University, Department of Anthropology, College Station, TX, United States
Pages: 399-402
Published: 200105
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 35
Accession Number: 2001-038562
Categories: Quaternary geology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: With GSA Data Repository Item 2001044
Illustration Description: sects., sketch map
N31°19'60" - N32°22'60", W110°28'00" - W109°04'00"
N26°00'00" - N37°00'00", W114°45'00" - W93°30'00"
N32°30'00" - N33°30'00", W112°13'60" - W110°28'00"
N31°23'60" - N32°30'00", W113°22'00" - W110°28'00"
Secondary Affiliation: University of Arizona, Tucson, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 200112
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