Fabric Code: tpr191

Manus andesitic

Quartz-free andesitic temper. Occurs as moderately sorted, fine to medium-grained, subangular to subrounded volcanic sand. Plagioclase feldspar, clinopyroxene, and hornblende are the principal mineral grains, with varied volcanic rock fragments and opaque iron oxides the only other grain types present. The volcanic rock fragments are nearly all microlitic (pilotaxitic to hyalopilitic) or vitric, with internal textures suggestive of the groundmasses of andesitic rocks.

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.	Quartz	Feldspar	Pyroxene	Amphibole	Opaques	Olivine	Biotite	Muscovite	Epidote	Garnet/ Spinel	Ig./Met. Rocks	Sed. Rocks	Grog	Lithics/ Region
Max	0	0	4	4	4	2	0	0	0	0	0	3	0	0	microlitic, vitric
Min	0	0	3	3	1	1	0	0	0	0	0	1	0	0	Bismarck

Representative slides:

Slide	Site	Possible Origin	Cal.	Quartz	Feldspar	Pyroxene	Amphibole	Opaques	Olivine	Biotite	Muscovite	Epidote	Garnet/ Spinel	Ig./Met. Rocks	Sed. Rocks	Grog	Lithics
WD_41_7	Manus (Manus)	Manus	0	0	4	3	4	1	0	0	0	0	0	1	0	0	vitric, microlitic
WD_41_4	Manus (Manus)	Manus	0	0	4	3	4	1	0	0	0	0	0	1	0	0	vitric, microlitic
WD_41_5	Manus (Manus)	Manus	0	0	3	3	1	2	0	0	0	0	0	3	0	0	vitric, microlitic
WD_41_8	M'Buke (Manus)	Manus	0	0	3	3	4	1	0	0	0	0	0	1	0	0	vitric, microlitic

WD_41_7

GDE59_4 — Sherd GDE59-4 from Manus (Manus). Slide WD_41_7 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.

GDE59_4 — Sherd GDE59-4 from Manus (Manus). Slide WD_41_7 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.

Quartz-free andesitic temper sand. Stream sand present. Pyroxene < Hornblende.

WD_41_4

Kohin_Cave59_1 — Sherd 59-1 from Manus (Manus). Slide WD_41_4 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.

Kohin_Cave59_1 — Sherd 59-1 from Manus (Manus). Slide WD_41_4 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.

Quartz-free andesitic temper sand. Stream sand present. Pyroxene < Hornblende.

WD_41_5

GAO59_2 — Sherd GAO59-2 from Manus (Manus). Slide WD_41_5 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.

GAO59_2 — Sherd GAO59-2 from Manus (Manus). Slide WD_41_5 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.

Quartz-free andesitic temper sand. Stream sand present. Pyroxene > Hornblende.

WD_41_8

MBK59_5 — Sherd MBK59-5 from M'Buke (Manus). Slide WD_41_8 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.

MBK59_5 — Sherd MBK59-5 from M'Buke (Manus). Slide WD_41_8 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.

Quartz-free andesitic temper sand. Stream sand present. Pyroxene < Hornblende.

References:

145 Manus, Admiralty, PNG, 1997 (Dickinson, W.)

150 Mussau, Manus, New Hanover, New Ireland, PNG, 1997 (Dickinson, W.)