Sea-rafted pumice on the Australian east coast: numerical classification and stratigraphy
Titel:
Sea-rafted pumice on the Australian east coast: numerical classification and stratigraphy
Auteur:
Ward, W. T. Little, I. P.
Verschenen in:
Australian journal of earth sciences
Paginering:
Jaargang 47 (2000) nr. 1 pagina's 95-109
Jaar:
2000-02
Inhoud:
Sixteen elements (Ca, K, Mg, Na, Al, Fe, Mn, P, Co, Cu, Li, Ni, Rb, Sr, Ti, Zn, determined by atomic absorption) were identified in 453 pumice fragments recovered from Holocene strandplains in southeast Queensland and New South Wales. Eight pumice groups and 13 subgroups are recognised by numerical analysis. Some pumices record known eruptions. Others come from known centres in Tonga and Vanuatu. Several pumice eruptions have occurred from some centres, but there are instances of single episodes. The numerical analyses, combined with carbon dating and soil identification, identify marker horizons in the development of the strandplains. These horizons provide a time-scale for soil development. Pumice that occurs in middens has an archaeological value. Coke was found with recent pumice. It conveniently identifies the modern industrial age.
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