Site: Tataga-Matau

Island: Tutuila Lithology: Volcanic high island ( Nunn et al. (2016) )

Lithology and Age: Cenozoic mafic-intermediate volcanic rocks ( Chorlton (2007) ) Macrostrat Geological Map Link

Near/In Geonames ID: 7268016 Wikidata ID: None Getty Thesaurus of Geographic Names ID: None

Mindat Loc ID: None

In:

Tutuila Wikidata ID: Q269205

American Samoa Wikidata ID: Q16641

Samoan Islands Wikidata ID: Q162126

Volcanoes:

Tutuila: Basalt / Picro-Basalt, Cluster type, Tuff cone(s).

Note that to see the 'Geology' layer (layer options in top right corner) you may have to zoom out.

Fabrics:

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
tpr294	0	0	0	1	0	1	1	0	0	0	0	6	0	0	vitric
Samoan colluvium	0	0	0	0	0	0	0	0	0	0	0	6	0	0	Samoa
tpr290a	0	0	5	0	0	2	0	0	0	0	0	6	0	0	microlitic, vitric
Samoan crushed microlitic lithic	0	0	3	0	0	0	0	0	0	0	0	4	0	0	Samoa

Slides:

Slide	Fabric	Possible Origin	Ware	Cal.	Quartz	Feldspar	Pyroxene	Amphibole	Opaques	Olivine	Biotite	Muscovite	Epidote	Garnet/ Spinel	Ig./Met. Rocks	Sed. Rocks	Grog	Lithics
WD_22_11	tpr290a (Samoan crushed microlitic lithic)	Samoa	Samoa Polynesian Plainware (2500 - 1700 BP)	0	0	4	0	0	1	0	0	0	0	0	5	0	0	microlitic, victric, lathwork
WD_25_13	tpr294 (Samoan colluvium)	Samoa	Samoa Polynesian Plainware (2500 - 1700 BP)	0	0	0	0	0	1	0	0	0	0	0	6	0	0	vitric

WD_22_11

Tagaga_3 — Sherd 3 from Tataga-Matau (Tutuila). Slide WD_22_11 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image or full slide in VIMIPO (user: Guest pwd: Guest). Imaged by K. Hardy and M. Leclerc, ANU.

Tagaga_3 — Sherd 3 from Tataga-Matau (Tutuila). Slide WD_22_11 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image or full slide in VIMIPO (user: Guest pwd: Guest). Imaged by K. Hardy and M. Leclerc, ANU.

Basaltic rock fragments have glassy groundmass with plagioclase laths and altered pyroxene and olivines.

WD_25_13

Toaga_4 — Sherd 4 from Tataga-Matau (Tutuila). Slide WD_25_13 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.

Toaga_4 — Sherd 4 from Tataga-Matau (Tutuila). Slide WD_25_13 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.

Sparse temper.

References:

096 Tataga-Matau Fort, American Samoa 1988 (Dickinson, W.)