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(Article of periodic en Anglais - 1983)

Document title

Development of a chenier plain, Firth of Thames, New Zealand

Authors(s) and Affiliation(s)

WOODROFFE C. D. ; CURTIS R. J. ; McLEAN R. F. ;

Abstract

Subsurface data from the Miranda coastal plain, Firth of Thames, confirm that shell ridges between Kaiana and Miranda are true cheniers. Surveys of a modern chenier indicate that coarse sediment and shell form sand-bars on the foreshore and that these migrate landwards through swash action. The continuity of the shell layer, radiometrically dated to 3650 60 yrs BP to landward and 1260 50 yrs BP to seawards implies that there have not been oscillations of sea-level during this regressive coastal phase while the shell ridges have developed. Mactra were also found in situ at the north and south of the coastal plain dated to 4510 70 and 200 60 yrs BP respectively.

Source

Article of periodic

published at : Marine geology Amsterdam

Editor :

Millesime : 1983, no53 [pp. 1-22]

Bibliographic references : 43 réf.

Language

Anglais

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