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|Title:||Macrofossils in Raraku Lake (Easter Island) integrated with sedimentary and geochemical records towards a palaeoecological synthesis for the last 34,000 years|
|Author:||Cañellas Boltà, Núria|
Rull del Castillo, Valentí
Margalef Marrasé, Olga
Giralt Romeu, Santiago
Pueyo Mur, Juan José
Birks, Hilary H.
Birks, H. J. B. (Harry John Betteley)
|Abstract:||Macrofossil analysis of a composite 19 m long sediment core from Rano Raraku Lake (Easter Island)was related to litho-sedimentary and geochemical features of the sediment. Strong stratigraphical patterns are shown by indirect gradient analyses of the data. The good correspondence between the stratigraphical patterns derived from macrofossil (Correspondence Analysis) and sedimentary and geochemical data (Principal Component Analysis) shows that macrofossil associations provide sound palaeolimnological information in conjunction with sedimentary data. The main taphonomic factors in fluencing the macrofossil assemblages are run-off from the catchment, the littoral plant belt, and the depositional environment within the basin. Five main stages during the last 34,000 calibrated years BP (cal yr BP) are characterised from the lithological, geochemical, and macrofossil data. From 34 to 14.6 cal kyr BP (last glacial period) the sediments were largely derived from the catchment, indicating a high energy lake environment with much erosion and run-off bringing abundant plant trichomes, lichens, and mosses into the centre of Raraku Lake.|
|Note:||Versió postprint del document publicat a: 10.1016/j.quascirev.2011.12.013|
|It is part of:||Quaternary Science Reviews, 2012, vol. 34, p. 113-126|
|Appears in Collections:||Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)|
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