Site: Va'ota

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

Lithology and Age: None ( Chorlton (2007) )       Macrostrat Geological Map Link

Near/In Geonames ID: 5881184       Wikidata ID: None       Getty Thesaurus of Geographic Names ID: None

Mindat Loc ID: None


In:

Ofu Island Wikidata ID: Q3881068

American Samoa Wikidata ID: Q16641

Samoan Islands Wikidata ID: Q162126


Volcanoes:

Ofu-Olosega: Basalt / Picro-Basalt, Shield type, Shield(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. QuartzFeldspar Pyroxene Amphibole Opaques OlivineBiotite Muscovite Epidote Garnet/ SpinelIg./Met. Rocks Sed. Rocks Grog Lithics/ Region
tpr295 0 0 1 5 0 3 4 0 0 0 0 6 0 0 lathwork, vitric
Samoan ferromagnesian beach 0 0 0 3 0 1 2 0 0 0 0 3 0 0 Samoa
tpr291 3 0 2 3 1 3 3 1 0 0 0 6 0 0 lathwork, vitric
Samoan lithic 0 0 0 1 0 0 1 0 0 0 0 4 0 0 Samoa

Slides:

Slide Fabric Possible OriginCal. QuartzFeldspar Pyroxene Amphibole Opaques OlivineBiotite Muscovite Epidote Garnet/ Spinel Ig./Met. Rocks Sed. Rocks Grog Lithics
WD_22_22 tpr295 (Samoan ferromagnesian beach) Samoa 0 0 1 5 0 1 3 0 0 0 0 3 0 0 lathwork, microlitic

WD_22_22

Vaota_69_1 Vaota_69_1
Sherd 67-1 from Va'ota (Ofu). Slide WD_22_22 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.

Rocks have holocrystalline plagioclase-clinopyroxene groundmasses.


References:

139 Ofu, Manu'a, American Samoa, 1997 (Dickinson, W.)