Fabric Code: tpr21

Guam lithic hi andesitic

High lithic andesitic temper with vitric to hyalopilitic volcanic rock fragments dominant.

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	2	2	0	2	0	0	0	0	0	6	0	0	vitric, microlitic
Min	0	0	1	1	0	1	0	0	0	0	0	6	0	0	Marianas

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_7_1	Waterfront Annex (Guam)	Guam	0	0	1	2	0	1	0	0	0	0	0	6	0	0	vitric, microlitic
WD_7_24	Ipan Beach (Guam)	Guam	0	0	2	1	0	1	0	0	0	0	0	6	0	0	vitric
WD_7_3	Ordnance Annex (Guam)	Guam	0	0	2	1	0	2	0	0	0	0	0	6	0	0	vitric, microlitic
WD_8_1	Mochong (Rota)	Guam	0	0	2	1	0	2	0	0	0	0	0	6	0	0	vitric
WD_8_9	Tarague (Guam)	Guam	0	0	2	1	0	2	0	0	0	0	0	6	0	0	microlitic, vitric

WD_7_1

guam_49 — Sherd 49 from Waterfront Annex (Guam). Slide WD_7_1 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image or full slide in VIMIPO. Imaged by K. Hardy and M. Leclerc, ANU.

guam_49 — Sherd 49 from Waterfront Annex (Guam). Slide WD_7_1 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image or full slide in VIMIPO. Imaged by K. Hardy and M. Leclerc, ANU.

Highly lithic sand temper.

WD_7_24

guam_IPA1 — Sherd IPA1 from Ipan Beach (Guam). Slide WD_7_24 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image in VIMIPO. Imaged by K. Hardy and M. Leclerc, ANU.

guam_IPA1 — Sherd IPA1 from Ipan Beach (Guam). Slide WD_7_24 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image in VIMIPO. Imaged by K. Hardy and M. Leclerc, ANU.

Andesitic temper sand rich in glassy volcanic rock fragments and lacking any calcareous grains indicative of coastal origin.

WD_7_3

guam_123 — Sherd 123 from Ordnance Annex (Guam). Slide WD_7_3 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image in VIMIPO. Imaged by K. Hardy and M. Leclerc, ANU.

guam_123 — Sherd 123 from Ordnance Annex (Guam). Slide WD_7_3 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image in VIMIPO. Imaged by K. Hardy and M. Leclerc, ANU.

Highly lithic sand temper.

WD_8_1

MochongRotaI — Sherd MochongRotaI from Mochong (Rota). Slide WD_8_1 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image in VIMIPO. Imaged by K. Hardy and M. Leclerc, ANU.

MochongRotaI — Sherd MochongRotaI from Mochong (Rota). Slide WD_8_1 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image in VIMIPO. Imaged by K. Hardy and M. Leclerc, ANU.

Deeply weathered. Volcanic sand temper.

WD_8_9

Tarague_71_2 — Sherd 71-2 from Tarague (Guam). Slide WD_8_9 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image in VIMIPO. Imaged by K. Hardy and M. Leclerc, ANU.

Tarague_71_2 — Sherd 71-2 from Tarague (Guam). Slide WD_8_9 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image in VIMIPO. Imaged by K. Hardy and M. Leclerc, ANU.

Poorly sorted volcanic sand temper rich in glassy volcanic rock fragments characteristic of indigenous Guam tempers.

References:

204 Guam, Mariana, 2001 (Dickinson, W.)