气候变化领域集成服务门户(CCPortal): The Texas Creek landslide, southwestern British Columbia: new ages and implications for the culture history and geomorphology of the mid-Fraser River region

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DOI	10.1139/cjes-2023-0049
	The Texas Creek landslide, southwestern British Columbia: new ages and implications for the culture history and geomorphology of the mid-Fraser River region
	Friele, Pierre; Blais-Stevens, Andree; Gosse, John C.
发表日期	2024
ISSN	0008-4077
EISSN	1480-3313
起始页码	61
结束页码	3
卷号	61 期号:3
英文摘要	The Texas Creek rock avalanche is a prehistoric deposit in the Fraser River Canyon, 17 km south of Lillooet, southwestern British Columbia, Canada. Original mapping suggested that the debris consisted of two landslides: a 45 Mm3 event deposited after the Mazama tephra but before about 2 ka ago, and a 7.2 Mm3 event about 1.1 ka ago. The proposed timing of the younger landslide was correlated with a decline in the First Nations population and was proposed as an agent of cultural collapse driven by its impact on salmon returns vital to the population's sustenance. We provide six surface exposure ages using 10Be from boulder tops, with three samples from each surface that were originally posited to be older and younger debris. The six samples yielded similar ages suggesting the landslide deposit represents a single event with an average age of 2.28 +/- 0.19 (2 sigma external error) ka before 1950 AD. Evidently, the landslide played no role in the cultural collapse. Fraser River Holocene incision rates, estimated pre- and post -landslide are between 13 and 24 mm/yr, consistent with previous estimates for the midFraser River region. Landslide timing is coincident with the explosive eruption of Mount Meager, 120 km to the northwest, and with a possible landslide at Mystery Creek 85 km to the west and 65 km south of Mount Meager. The landslide may have been seismically triggered, but attribution is speculative.
英文关键词	landslide; river interruption; paleo-demography; British Columbia; Fraser River; Texas Creek
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001161463800001
来源期刊	CANADIAN JOURNAL OF EARTH SCIENCES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/300928
作者单位	Natural Resources Canada; Lands & Minerals Sector - Natural Resources Canada; Geological Survey of Canada; Dalhousie University
推荐引用方式 GB/T 7714	Friele, Pierre,Blais-Stevens, Andree,Gosse, John C.. The Texas Creek landslide, southwestern British Columbia: new ages and implications for the culture history and geomorphology of the mid-Fraser River region[J],2024,61(3).
APA	Friele, Pierre,Blais-Stevens, Andree,&Gosse, John C..(2024).The Texas Creek landslide, southwestern British Columbia: new ages and implications for the culture history and geomorphology of the mid-Fraser River region.CANADIAN JOURNAL OF EARTH SCIENCES,61(3).
MLA	Friele, Pierre,et al."The Texas Creek landslide, southwestern British Columbia: new ages and implications for the culture history and geomorphology of the mid-Fraser River region".CANADIAN JOURNAL OF EARTH SCIENCES 61.3(2024).