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Late quaternary deposits of the Christchurch metropolitan area

 

作者: R. P. Suggate,  

 

期刊: New Zealand Journal of Geology and Geophysics  (Taylor Available online 1958)
卷期: Volume 1, issue 1  

页码: 103-122

 

ISSN:0028-8306

 

年代: 1958

 

DOI:10.1080/00288306.1958.10422799

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

Deep wells sunk for artesian water beneath Christchurch penetrate three formations. The youngest, the Christchurch Formation, consists of marine, estuarine, and fluviatile deposits of which at least the upper part was formed during the post-glacial rise of sea-level. It extends down to more than 200 ft below present sea-level, and radiocarbon dates record part of the rise of sealevel, from — 73 ft 9400 years ago (S83/501) to — 12 ft 6100 years ago (S84/523). Other dates, together with topographic and soil evidence, are interpreted as indicating the 'Subsequent period of development by the Waimakariri River of a fan of gravel over the Christchurch area, probably completed about 2,000 years ago when sea-level was a little higher than at present. The aggradation surface of this fan is termed the Yaldhurst Surface.

 

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