Fabric Code: tpr8

Saipan hybrid quartzose

Hybrid calcareous, quartzose volcanic sand tempers. Feldspar is plagioclase.

Fabric Class:

Calcareous-Quartzose: Dominated by calcareous and quartz inclusions.

Andesitic Arc Quartzose Variant: Dominated by andesite and basalt lithic fragments, with microlitic, felsitic and vitric textures, and the andesite minerals (plagioclase, clinopyroxene and sometimes hornblende). With quartz.

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 5 4 2 2 0 2 0 0 0 0 0 2 0 0 microlitic, felsitic
Min 4 3 1 0 0 1 0 0 0 0 0 1 0 0 Marianas

Representative slides:

Slide Site Possible OriginCal. QuartzFeldspar Pyroxene Amphibole Opaques OlivineBiotite Muscovite Epidote Garnet/ Spinel Ig./Met. Rocks Sed. Rocks Grog Lithics
WD_6_9 Unai Chulu (Tinian) Saipan 5 3 1 1 0 1 0 0 0 0 0 1 0 0 microlitic, felsitic
WD_6_12 Kahet (Tinian) Saipan 4 4 1 0 0 1 0 0 0 0 0 1 0 0 felsitic
WD_6_17 Tumon Bay (Guam) Saipan 4 4 2 1 0 1 0 0 0 0 0 2 0 0 microlitic, felsitic

WD_6_9

TinianUC1 TinianUC1
Sherd UC1 from Unai Chulu (Tinian). Slide WD_6_9 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.

Hybrid sand temper containing unstrained quartz as the most abundant terrigenous grain. Pre-latte.


WD_6_12

Tinian04T Tinian04T
Sherd 04T from Kahet (Tinian). Slide WD_6_12 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.

Temper with reddish surfaces but uniformly dark and hackly interiors, contains quartz-rich temper sand admixed with calcareous grains.


WD_6_17

Tumon433 Tumon433
Sherd 433 from Tumon Bay (Guam). Slide WD_6_17 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.

Hybrid quartose dactic. Called 443 in report. Imported. pre-latte.


References:

323 Mariana, reports 1-15 for MTAT, 1998 (Dickinson, W.)