Mineralogy, stratigraphy, and provenance of soil coverbeds in the Kumara district, Westland

Autor:	Vincent E. Neall, M. C. Williams, Robert B. Stewart, R. C. Wallace, G. Mew
Rok vydání:	2001
Předmět:	Provenance Geophysics Loess Rhyolite Outwash plain Earth and Planetary Sciences (miscellaneous) Mineralogy Geology Silt Quaternary Quartz Isotopes of oxygen
Zdroj:	New Zealand Journal of Geology and Geophysics. 44:205-218
ISSN:	1175-8791 0028-8306
DOI:	10.1080/00288306.2001.9514935
Popis:	The sand and silt mineralogy of four soils preserved on fluvioglacial outwash terraces at Kumara indicates that the main soil body is developed in up to 1 m of loessial coverbeds that accumulated subsequent to cessation of gravel terrace formation. Oxygen isotope abundances of the dominant mineral quartz in these soils show a higher temperature origin for the >250 |4.m fraction, consistent with derivation from local granodiorites. Finer quartz is of a mixed provenance origin consistent with the variety of rock types in the region. The finest quartz
Databáze:	OpenAIRE
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