Fabric Code: tpr181

Northcoast PNG hornblendic

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.

Fabric Class:

Feldspathic Igneous-Amphibolic: Dominated by feldspar inclusions, with igneous lithics and amphiboles.

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 1 5 0 4 1 0 0 0 0 0 2 0 0 vitric, felsitic
Min 0 1 5 0 3 1 0 0 0 0 0 2 0 0 PNG

Representative slides:

Slide Site Possible OriginWareCal. QuartzFeldspar Pyroxene Amphibole Opaques OlivineBiotite Muscovite Epidote Garnet/ Spinel Ig./Met. Rocks Sed. Rocks Grog Lithics
WD_80_2 Watinglo (New Guinea) unknown 0 1 5 0 4 1 0 0 0 0 0 2 0 0 vitric, felsitic
WD_80_18 Lachitu (New Guinea) unknown 0 1 5 0 3 1 0 0 0 0 0 2 0 0 vitric, felsitic
WD_80_16 Lachitu (New Guinea) unknown 0 0 5 0 4 1 0 0 0 0 0 2 0 0 vitric, felsitic

WD_80_2

WATA5_12 WATA5_12
Sherd WATA5-12 from Watinglo (New Guinea). Slide WD_80_2 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 with higher exposure. Imaged by K. Hardy and M. Leclerc, ANU.

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


WD_80_18

RQ4_16 RQ4_16
Sherd RQ4-16 from Lachitu (New Guinea). Slide WD_80_18 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.

Hornblendic volcanic sand temper.


WD_80_16

RQ4_1 RQ4_1
Sherd RQ4-1 from Lachitu (New Guinea). Slide WD_80_16 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.

Hornblendic volcanic sand temper.


References:

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