Fabric Code: tpr181a

Northcoast PNG volcanic

Dominant plagioclase feldspar and hornblende varieties are the only ferromagnesian silicate grains, some rock fragments with glassy to felsitic internal textures, moderately sorted, subangular to subrounded, fine to medium volcanic sand of probable fluvial origin.

Sites:

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 0 0 1 0 0 0 0 0 4 0 0 vitric, felsitic
Min 0 0 5 0 0 1 0 0 0 0 0 4 0 0 PNG

Representative slides:

Slide Site Possible OriginCal. QuartzFeldspar Pyroxene Amphibole Opaques OlivineBiotite Muscovite Epidote Garnet/ Spinel Ig./Met. Rocks Sed. Rocks Grog Lithics
WD_80_10 Watinglo (Aitape Coast) unknown 0 1 5 0 0 1 0 0 0 0 0 4 0 0 vitric, felsitic

WD_80_10

WATC_5 WATC_5
Sherd WATC-5 from Watinglo (Aitape coast). Slide WD_80_10 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image in VIMIPO. Imaged by K. Hardy and M. Leclerc, ANU.

Non-hornblendic volcanic sand temper.


References:

279 Watinglo, Lachitu, PNG, 2009 (Dickinson, W.)