Guam Island

Wikidata ID: Q16635

Lithology and Age: Cenozoic sedimentary rocks ( Chorlton (2007) )       Macrostrat Geological Map Link

Geonames ID: 4043542       Getty Thesaurus of Geographic Names ID: 7000550

Mindat Loc ID: 57494

brown pot Site has a full slide image.

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Many fabrics have a range of abundances. The range maximum (top) and minimum (bottom) are shown.

** Has full slide image available.

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
tpr16 6 0 1 0 0 1 0 0 0 0 0 1 0 0 na
Guam calcareous 6 0 0 0 0 0 0 0 0 0 0 0 0 0 Marianas
tpr17 ** 0 0 2 6 0 2 0 0 0 0 0 2 0 0 microlitic, vitric
Guam pyroxenic 0 0 1 5 0 1 0 0 0 0 0 2 0 0 Marianas
tpr21 ** 0 0 2 2 0 2 0 0 0 0 0 6 0 0 vitric, microlitic
Guam lithic hi andesitic 0 0 1 1 0 1 0 0 0 0 0 6 0 0 Marianas
tpr20 ** 0 0 3 3 0 3 0 0 0 0 0 6 0 0 vitric, microlitic
Guam lithic andesiitic 0 0 1 1 0 1 0 0 0 0 0 5 0 0 Marianas
tpr22 1 3 4 2 0 2 0 1 0 0 0 4 0 0 vitric, felsitic
Saipan quartzose 0 3 3 1 0 1 0 1 0 0 0 3 0 0 Marianas
tpr19 0 0 5 3 0 1 0 0 0 0 0 5 0 0 vitric, microlitic
Guam vitric andesitic 0 0 2 2 0 0 0 0 0 0 0 4 0 0 Marianas
tpr18 4 0 2 5 0 2 0 0 0 0 0 3 0 0 vitric, felsitic
Guam hybrid 2 0 1 3 0 1 0 0 0 0 0 2 0 0 Marianas
tpr8 5 4 2 2 0 2 0 0 0 0 0 2 0 0 microlitic, felsitic
Saipan hybrid quartzose 4 3 1 0 0 1 0 0 0 0 0 1 0 0 Marianas
tpr5 ** 0 4 3 0 0 1 0 0 0 0 0 6 0 0 vitric, felsitic
Saipan dacitic 0 2 1 0 0 0 0 0 0 0 0 4 0 0 Marianas

Slides:

Slide Fabric Possible OriginCal. QuartzFeldspar Pyroxene Amphibole Opaques OlivineBiotite Muscovite Epidote Garnet/ Spinel Ig./Met. Rocks Sed. Rocks Grog Lithics
WD_5_25 tpr16 (Guam calcareous) Guam 6 0 0 0 0 0 0 0 0 0 0 0 0 0 na
WD_5_6 tpr17 (Guam pyroxenic) Guam 0 0 2 5 0 2 0 0 0 0 0 2 0 0 microlitic, vitric
WD_7_24 tpr21 (Guam lithic hi andesitic) Guam 0 0 2 1 0 1 0 0 0 0 0 6 0 0 vitric
WD_7_21 tpr20 (Guam lithic andesiitic) Guam 0 0 2 3 0 1 0 0 0 0 0 6 0 0 vitric
WD_2_25 tpr22 (Saipan quartzose) Saipan 0 3 4 1 0 1 0 0 0 0 0 3 0 0 vitric, felsitic
WD_8_5 tpr19 (Guam vitric andesitic) Guam 0 0 5 2 0 1 0 0 0 0 0 4 0 0 felsitic, microlitic, vitric
WD_5_17 tpr16 (Guam calcareous) Guam 6 0 0 0 0 0 0 0 0 0 0 0 0 0 na
WD_5_14 tpr18 (Guam hybrid) Guam 4 0 2 4 0 2 0 0 0 0 0 2 0 0 felsitic, vitric
WD_5_7 tpr18 (Guam hybrid) Guam 4 0 2 3 0 2 0 0 0 0 0 2 0 0 felsitic, vitric
WD_5_15 tpr20 (Guam lithic andesiitic) Guam 0 0 3 2 0 3 0 0 0 0 0 5 0 0 vitric
WD_7_16 tpr19 (Guam vitric andesitic) Guam 0 0 3 3 0 0 0 0 0 0 0 5 0 0 vitric, microlitic
WD_7_4 tpr20 (Guam lithic andesiitic) Guam 0 0 2 3 0 2 0 0 0 0 0 5 0 0 vitric, microlitic
WD_7_8 tpr20 (Guam lithic andesiitic) Guam 0 0 2 1 0 3 0 0 0 0 0 6 0 0 vitric, microlitic
WD_7_3 tpr21 (Guam lithic hi andesitic) Guam 0 0 2 1 0 2 0 0 0 0 0 6 0 0 vitric, microlitic
WD_15_23 tpr20 (Guam lithic andesiitic) Guam 0 0 1 1 0 1 0 0 0 0 0 6 0 0 vitric
WD_5_20 tpr20 (Guam lithic andesiitic) Guam 0 0 3 2 0 3 0 0 0 0 0 5 0 0 vitric
WD_5_13 tpr20 (Guam lithic andesiitic) Guam 0 0 2 1 0 2 0 0 0 0 0 6 0 0 microlitic
WD_5_9 tpr20 (Guam lithic andesiitic) Guam 0 0 2 2 0 0 0 0 0 0 0 5 0 0 felsitic, vitric
WD_8_12 tpr18 (Guam hybrid) Guam 2 0 1 5 0 1 0 0 0 0 0 2 0 0 vitric, microlitic
WD_8_14 tpr20 (Guam lithic andesiitic) Guam 0 0 2 2 0 1 0 0 0 0 0 5 0 0 microlitic, vitric
WD_8_16 tpr20 (Guam lithic andesiitic) Guam 0 0 2 2 0 1 0 0 0 0 0 6 0 0 microlitic, vitric
WD_8_9 tpr21 (Guam lithic hi andesitic) Guam 0 0 2 1 0 2 0 0 0 0 0 6 0 0 microlitic, vitric
WD_7_23 tpr20 (Guam lithic andesiitic) Guam 0 0 2 1 0 2 0 0 0 0 0 5 0 0 vitric
WD_6_17 tpr8 (Saipan hybrid quartzose) Saipan 4 4 2 1 0 1 0 0 0 0 0 2 0 0 microlitic, felsitic
WD_7_19 tpr19 (Guam vitric andesitic) Guam 0 0 4 3 0 0 0 0 0 0 0 4 0 0 vitric, microlitic
WD_7_1 tpr21 (Guam lithic hi andesitic) Guam 0 0 1 2 0 1 0 0 0 0 0 6 0 0 vitric, microlitic
WD_2_23 tpr5 (Saipan dacitic) Saipan 0 3 3 0 0 1 0 0 0 0 0 5 0 0 vitric, felsitic
WD_5_18 tpr20 (Guam lithic andesiitic) Guam 0 0 2 3 0 0 0 0 0 0 0 5 0 0 felsitic, vitric
WD_5_8 tpr20 (Guam lithic andesiitic) Guam 0 0 2 3 0 0 0 0 0 0 0 5 0 0 felsitic, vitric

WD_5_25

Ma_GU_6_20 Ma_GU_6_20
Sherd Ma-GU-6-20 from Fouha Bay (Guam). Slide WD_5_25 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.

Calcareous temper.


WD_5_6

Ma_GU_6_1 Ma_GU_6_1
Sherd Ma-GU-6-1 from Fouha Bay (Guam). Slide WD_5_6 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.

Pyroxenic volcanic sand temper. Clinopyroxene dominant, but minor orthopyroxene.


WD_7_24

guam_IPA1 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 (user: Guest pwd: Guest). 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_21

guam_G3 guam_G3
Sherd G3 from Laguas (Guam). Slide WD_7_21 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.

Sand temper likely derived from wares made on Guam.


WD_2_25

GuamLaguas2 GuamLaguas2
Sherd Laguas2 from Laguas (Guam). Slide WD_2_25 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.

Sand temper likely derived from wares made on Saipan.


WD_8_5

Manenggon876 Manenggon876
Sherd 876 from Manenggon (Guam). Slide WD_8_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.

Historic sherd. Feldspathic andesitic volcanic sand temper, moderately sorted and composed of subrounded to subangular grains of very fine to medium size.


WD_5_17

Nomna-11 has a full slide scan available (user: Guest pwd: Guest). Imaged by K. Hardy and M. Leclerc, ANU.

Calcareous.


WD_5_14

Nomna-8 has a full slide scan available (user: Guest pwd: Guest). Imaged by K. Hardy and M. Leclerc, ANU.

Hybrid lithic.


WD_5_7

Ma_GU_23_2 Ma_GU_23_2
Sherd Ma-GU-23-2 from Nomna Bay (Guam). Slide WD_5_7 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.

Volcanic calcareous temper.


WD_5_15

Nomna-9 has a full slide scan available (user: Guest pwd: Guest). Imaged by K. Hardy and M. Leclerc, ANU.

Lithic volcanic sand.


WD_7_16

guam_516 guam_516
Sherd 516 from Ordnance Annex (Guam). Slide WD_7_16 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.

Lowly lithic sand temper.


WD_7_4

guam_385A guam_385A
Sherd 385A from Ordnance Annex (Guam). Slide WD_7_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.

Mediumly lithic sand temper.


WD_7_8

guam_76 guam_76
Sherd 76 from Ordnance Annex (Guam). Slide WD_7_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.

Mediumly lithic sand temper.


WD_7_3

guam_123 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 (user: Guest pwd: Guest). Imaged by K. Hardy and M. Leclerc, ANU.

Highly lithic sand temper.


WD_15_23

Pago137 Pago137
Sherd Pago137 from Pago (Guam). Slide WD_15_23 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.

Volcanic sand temper rich in brownish to reddish glassy lithic fragments. Early historic sherd.


WD_5_20

Ma_GYo_1_13 Ma_GYo_1_13
Sherd Ma-GYo-1-13 from Pulantat (Guam). Slide WD_5_20 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.

Volcanic sand temper.


WD_5_13

Ma_GU_8_7 Ma_GU_8_7
Sherd Ma-GU-8-7 from Talafofo (Guam). Slide WD_5_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.

Groundmass rock fragment suite distinct from that at Nomna Bay (more microlitic than vitric).


WD_5_9

Ma_GU_8_4 Ma_GU_8_4
Sherd Ma-GU-8-4 from Talafofo (Guam). Slide WD_5_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.

Lithic-rich volcanic sand temper.


WD_8_12

Tarague_71_5 Tarague_71_5
Sherd 71-5 from Tarague (Guam). Slide WD_8_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.

Hybrid beach sand temper in which calcareous reef detritus is admixed with terrigenous grains derived from volcanic rocks.


WD_8_14

Tarague_72_1 Tarague_72_1
Sherd 72-1 from Tarague (Guam). Slide WD_8_14 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.

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


WD_8_16

Tarague_72_3 Tarague_72_3
Sherd 72-3 from Tarague (Guam). Slide WD_8_16 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.

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


WD_8_9

Tarague_71_2 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 (user: Guest pwd: Guest). Imaged by K. Hardy and M. Leclerc, ANU.

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


WD_7_23

guam_488 guam_488
Sherd 488 from Tumon Bay (Guam). Slide WD_7_23 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.

Moderately sorted andesitic volcanic sand temper of probable fluvial origin composed of subangular to subrounded grains of fine to coarse sand rich in glassy volcanic rock fragments.


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.


WD_7_19

guam_43C guam_43C
Sherd 43C from Waterfront Annex (Guam). Slide WD_7_19 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.

Lowly lithic sand temper.


WD_7_1

guam_49 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 (user: Guest pwd: Guest). Imaged by K. Hardy and M. Leclerc, ANU.

Highly lithic sand temper.


WD_2_23

Guam43D Guam43D
Sherd 43D from Waterfront Annex (Guam). Slide WD_2_23 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.

Contains quartz-bearing temper sand diagnostic of derivation from Saipan.


WD_5_18

Ma_GU_1_12 Ma_GU_1_12
Sherd Ma-GU-1-12 from Inarajan (Guam). Slide WD_5_18 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.

Indigenous source.


WD_5_8

Ma_GU_1_3 Ma_GU_1_3
Sherd Ma-GU-1-3 from Inarajan (Guam). Slide WD_5_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.

Volcanic sand temper.


References:

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

027 Nomna Bay, Guam 1968 (Dickinson, W.)

028 Nomna Bay, Fouha Bay, Guam 1968 (Dickinson, W.)

208 Tarague, Guam, 2002 (Dickinson, W.)

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

What's new and what's cookin in the latte period pots (Moore, D.)

265 Pago Bay, Guam, Mariana, 2007 (Dickinson, W.)

187 Guam, 1999 (Dickinson, W.)