Fabric Code: tpr256

Banks volcanic

Poorly sorted, subangular to subrounded volcanic sand temper probably representing natural temper embedded in sandy clay bodies collected from slightly reworked colluvium or ravine fillings on inland flanks of island volcanoes. Contains clinopyroxene and plagioclase feldspar typical of sands derived from bedrock volcanic assemblages of basalt and mafic andesite. Abundant polycrystalline lithic fragments.

Fabric Class:

Igneous Feldspathic: Dominated by igneous lithic inclusions with feldspars.

Andesitic Arc: Dominated by andesite and basalt lithic fragments, with microlitic, felsitic and vitric textures, and the andesite minerals (plagioclase, clinopyroxene and sometimes hornblende).

Sites:

Ceramic Wares

Post-Lapita Banks (2700 - 2000 BP)

Mineral and Rock Abundances

None (0) Minor (1) Few (2) Common (3) Frequent (4) Major (5) Very Dominant (6)
0% 0-5% 5-15% 15-30 % 30-50% 50-70% 70-100%

Name Cal. QuartzFeldspar Pyroxene Amphibole Opaques OlivineBiotite Muscovite Epidote Garnet/ SpinelIg./Met. Rocks Sed. Rocks Grog Lithics/ Region
Max 0 0 5 3 1 2 0 0 0 0 0 5 0 0 microlitic, vitric
Min 0 0 3 1 0 1 0 0 0 0 0 3 0 0 Vanuatu

Representative slides:

Slide Site Possible OriginWareCal. QuartzFeldspar Pyroxene Amphibole Opaques OlivineBiotite Muscovite Epidote Garnet/ Spinel Ig./Met. Rocks Sed. Rocks Grog Lithics
WD_52_3 Pakea Islet (Kwakea) Banks Post-Lapita Banks (2700 - 2000 BP) 0 0 3 1 0 2 0 0 0 0 0 5 0 0 vitric, microlitic
WD_48_25 Pakea Islet (Kwakea) Banks 0 0 5 2 1 2 0 0 0 0 0 3 0 0 microlitic, vitric

WD_52_3

Pakea58_3 Pakea58_3
Sherd 58-3 from Pakea Islet (Kwakea). Slide WD_52_3 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image (user: Guest pwd: Guest) or full slide in VIMIPO. Imaged by K. Hardy and M. Leclerc, ANU.

Poorly sorted, subangular to subrounded volcanic sand temper probably representing natural temper embedded in sandy clay bodies collected from slightly reworked colluvium or ravine fillings on inland flanks of island volcanoes, contains clinopyroxene and plagioclase feldspar typical of sands derived from bedrock volcanic assemblages of basalt and mafic andesite. Abundant polycrystalline lithic fragments of: (a)microlitic grains with plagioclase laths or microlites, and (b) vitrics.


WD_48_25

Banks18 Banks18
Sherd 18 from Pakea Islet (Kwakea). Slide WD_48_25 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image in VIMIPO (user: Guest pwd: Guest). Imaged by K. Hardy and M. Leclerc, ANU.

Volcanic sand, brown vitric.


References:

261 Banks, Vanuatu, 2007 (Dickinson, W.)