干旱区生态环境知识资源中心(Arid): Erosion and deposition on the Pajarito Plateau, New Mexico, and implications for geomorphic responses to late Quaternary climatic changes

Arid

DOI	10.2172/215311
报告编号	LA-UR--96-582
来源ID	OSTI_ID: 215311
	Erosion and deposition on the Pajarito Plateau, New Mexico, and implications for geomorphic responses to late Quaternary climatic changes
	Reneau, S.L.; McDonald, E.V.; Gardner, J.N.; Longmire, P.A. [Los Alamos National Lab., NM (United States)]; Kolbe, T.R. [Woodward-Clyde Federal Services, Oakland, CA (United States)]; Carney, J.S. [Kent State Univ., OH (United States). Dept. of Geology]; Watt, P.M. [New Mexico Univ., Albuquerque, NM (United States). Dept. of Earth and Planetary Sciences]
英文摘要	The Pajarito Plateau of northern New Mexico contains a rich and diverse record of late Quaternary landscape changes in a variety of geomorphic settings that include gently-sloping mesa tops, steep canyon walls, and canyon bottoms. A broad range of investigations during the past decade, motivated by environmental and seismic hazard concerns, have resulted in examination of the characteristics, stratigraphy, and age of sediments and soils at numerous locations throughout the Plateau. Geochronologic control is provided by >140 radiocarbon dates supplemented by soil characterization and tephrochronology. In this paper we first summarize some of the results of recent and ongoing work on late Quaternary deposits on the Pajarito Plateau, illustrating both the complexity of the geomorphic record and some common elements that have been observed in multiple locations. We then use these observations, in combination with other work in the Southwest, to make some inferences about the local geomorphic response to regional climatic changes. Because the geomorphic and paleoclimatic records are fragmentary, and because the relations between large scale climate changes and local variations in precipitation, vegetation, and geomorphic processes are not fully understood, many uncertainties exist concerning the response of the local landscape to past climatic fluctuations. In addition, variations in local landscape sensitivity related to prior erosional history and spatial variations in vegetation, and the localized nature of many storms, probably contribute to the complexity of the geomorphic record. Nevertheless, the work discussed in this paper suggests a strong relation between regional climatic changes and local geomorphic history, and provides a framework for considering relations between modem processes, the record of past landscape changes, and future erosion and deposition on the Plateau and in surrounding areas.
出版年	1996
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	54 ENVIRONMENTAL SCIENCES ; CLIMATIC CHANGE ; ENVIRONMENTAL IMPACTS ; GEOLOGY ; MORPHOLOGICAL CHANGES ; EROSION ; PLANTS ; SEISMIC EFFECTS ; STRATIGRAPHY ; HISTORICAL ASPECTS ; CARBON 14 ; ISOTOPE DATING
URL	http://www.osti.gov/scitech/servlets/purl/215311
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/266528
推荐引用方式 GB/T 7714	Reneau, S.L.,McDonald, E.V.,Gardner, J.N.,et al. Erosion and deposition on the Pajarito Plateau, New Mexico, and implications for geomorphic responses to late Quaternary climatic changes,1996.