干旱区生态环境知识资源中心(Arid): Processes of Paleoindian site and desert pavement formation in the Atacama Desert, Chile

Arid

DOI	10.1017/qua.2020.39
	Processes of Paleoindian site and desert pavement formation in the Atacama Desert, Chile
	Ugalde, Paula C.; Quade, Jay; Santoro, Calogero M.; Holliday, Vance T.
通讯作者	Ugalde, PC
来源期刊	QUATERNARY RESEARCH
ISSN	0033-5894
EISSN	1096-0287
出版年	2020
卷号	98 页码:58-80
英文摘要	A distinct feature of many of the earliest archaeological sites (13,000-11,200 cal yr BP) at the core of the Atacama Desert is that they lie at or just below the surface, often encased in desert pavements. In this study, we compare these sites and undisturbed desert pavements to understand archaeological site formation and pavement development and recovery. Our results indicate these pavements and their soils are poorly developed regardless of their age. We propose that this is because of sustained lack of rain and extreme physical breakdown of clasts by salt expansion. Thus, the core of the Atacama provides an example of the lower limits of rainfall (<50 mm/yr) needed to form desert pavements. At site Quebrada Mani 12 (QM12), humans destroyed the pavement. After abandonment, human-made depressions were filled with eolian sands, incorporating artifacts in shallow deposits. Small and medium-sized artifacts preferentially migrated upwards, perhaps due to earthquakes and the action of salts. These artifacts, which now form palimpsests at the surface, helped - along with older clasts - to restore surface clast cover. Larger archaeological features remained undisturbed on top of a deeper Byzm horizon. The vesicular A horizons (Av horizons) have not regenerated on the archaeological sites due to extreme scarcity of rainfall during the Holocene.
英文关键词	Paleoindian Desert pavements Atacama Desert Vesicular horizons Hyperaridity
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000589068400005
WOS关键词	CENOZOIC CLIMATE-CHANGE ; EASTERN LIBYAN PLATEAU ; CIMA-VOLCANIC-FIELD ; STONE PAVEMENTS ; MOJAVE-DESERT ; HYPERARID CORE ; NORTHERN CHILE ; SOIL FORMATION ; ALLUVIAL FANS ; SURFACE
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
来源机构	University of Arizona
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327484
作者单位	[Ugalde, Paula C.; Quade, Jay; Holliday, Vance T.] Univ Arizona, Sch Anthropol, Tucson, AZ 85721 USA; [Quade, Jay; Holliday, Vance T.] Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA; [Santoro, Calogero M.] Univ Tarapaca, Inst Alta Invest, Arica, Chile
推荐引用方式 GB/T 7714	Ugalde, Paula C.,Quade, Jay,Santoro, Calogero M.,et al. Processes of Paleoindian site and desert pavement formation in the Atacama Desert, Chile[J]. University of Arizona,2020,98:58-80.
APA	Ugalde, Paula C.,Quade, Jay,Santoro, Calogero M.,&Holliday, Vance T..(2020).Processes of Paleoindian site and desert pavement formation in the Atacama Desert, Chile.QUATERNARY RESEARCH,98,58-80.
MLA	Ugalde, Paula C.,et al."Processes of Paleoindian site and desert pavement formation in the Atacama Desert, Chile".QUATERNARY RESEARCH 98(2020):58-80.