Site: Yap

Island: Yap Lithology: Composite high island ( Nunn et al. (2016) )

Lithology: Basaltic andesite and metavolcanic volcanics ( Dickinson (2006) )

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

Near/In Geonames ID: 2081175 Wikidata ID: Q209638 Getty Thesaurus of Geographic Names ID: 7006225

Mindat Loc ID: None

In:

Federated States of Micronesia Wikidata ID: Q702

Yap Wikidata ID: Q11342951

Caroline Islands Wikidata ID: Q118350

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
tpr272	0	0	4	0	1	2	0	0	4	0	0	6	0	0	metavolcanic
Yap metavolcanic	0	0	0	0	0	0	0	0	1	0	0	4	0	0	Carolines
tpr36	6	0	0	0	0	0	0	0	0	0	0	2	0	0	metavolcanic
Yap hybrid	6	0	0	0	0	0	0	0	0	0	0	1	0	0	Carolines
tpr38	6	0	2	2	0	2	0	0	0	0	0	1	0	0	metavolcanic
Yap hybrid calcareous	6	0	1	1	0	1	0	0	0	0	0	1	0	0	Carolines
tpr40	0	0	0	0	0	0	0	0	0	0	0	4	0	3	metavolcanic
Yap grog metavolcanic	0	0	0	0	0	0	0	0	0	0	0	3	0	3	Carolines
tpr41	0	5	2	0	0	0	0	0	0	0	0	0	5	3	chert
Palau-Yap quartzose grog	0	3	0	0	0	0	0	0	0	0	0	0	3	2	Carolines
tpr42	0	6	2	1	0	0	0	0	0	1	0	1	0	0	microphaneritic
Yap quartzose	0	6	0	0	0	0	0	0	0	0	0	0	0	0	Carolines

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_9_4	tpr272 (Yap metavolcanic)	Yap	Yap laminated ware (1100 - 0 BP)	0	0	0	0	0	2	0	0	1	0	0	6	0	0	metavolcanic
WD_9_2	tpr272 (Yap metavolcanic)	Yap	Yap plainware (1900 - 0 BP)	0	0	4	0	1	0	0	0	1	0	0	4	0	0	metavolcanic
WD_9_5	tpr272 (Yap metavolcanic)	Yap	Yap laminated ware (1100 - 0 BP)	0	0	0	0	0	0	0	0	4	0	0	4	0	0	metavolcanic
WD_9_7	tpr272 (Yap metavolcanic)	Yap	Yap laminated ware (1100 - 0 BP)	0	0	0	0	0	2	0	0	1	0	0	6	0	0	metavolcanic
WD_9_8	tpr272 (Yap metavolcanic)	Yap	Yap laminated ware (1100 - 0 BP)	0	0	0	0	0	2	0	0	1	0	0	6	0	0	metavolcanic
WD_9_10	tpr36 (Yap hybrid)	Yap	West Carolines Calcareous/Volcanic Sand (3000 - 600 BP)	6	0	0	0	0	0	0	0	0	0	0	2	0	0	metavolcanic
WD_9_12	tpr36 (Yap hybrid)	Yap	West Carolines Calcareous/Volcanic Sand (3000 - 600 BP)	6	0	0	0	0	0	0	0	0	0	0	2	0	0	metavolcanic
WD_10_11	tpr38 (Yap hybrid calcareous)	Yap	West Carolines Calcareous/Volcanic Sand (3000 - 600 BP)	6	0	1	1	0	2	0	0	0	0	0	1	0	0	metavolcanic
WD_9_15	tpr40 (Yap grog metavolcanic)	Yap		0	0	0	0	0	0	0	0	0	0	0	4	0	3	metavolcanic
WD_9_14	tpr41 (Palau-Yap quartzose grog)	Yap	Palau grog ware (2500 - 200 BP)	0	4	0	0	0	0	0	0	0	0	0	0	4	2	chert
WD_9_1	tpr41 (Palau-Yap quartzose grog)	Yap	Palau grog ware (2500 - 200 BP)	0	4	0	0	0	0	0	0	0	0	0	0	4	2	chert
WD_9_13	tpr41 (Palau-Yap quartzose grog)	Yap	Palau grog ware (2500 - 200 BP)	0	4	0	0	0	0	0	0	0	0	0	0	4	2	chert
WD_9_16	tpr42 (Yap quartzose)	Yap		0	6	2	0	0	1	0	0	0	1	0	1	0	0	microphaneritic
WD_9_17	tpr42 (Yap quartzose)	Yap	Yap laminated ware (1100 - 0 BP)	0	6	2	0	0	1	0	0	0	0	0	1	0	0	microphaneritic
WD_9_20	tpr42 (Yap quartzose)	Yap	Yap laminated ware (1100 - 0 BP)	0	6	2	0	0	1	0	0	0	0	0	1	0	0	microphaneritic

WD_9_4

yap19_1 — Sherd 19-1 from Yap (Yap). Slide WD_9_4 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.

yap19_1 — Sherd 19-1 from Yap (Yap). Slide WD_9_4 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.

Metavolcanic greenschist, schist micaceous.

WD_9_2

yap47_1 — Sherd 47-1 from Yap (Yap). Slide WD_9_2 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.

yap47_1 — Sherd 47-1 from Yap (Yap). Slide WD_9_2 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.

Detritus derived mostly from metavolcanic greenschist.

WD_9_5

yap19_4 — Sherd 19-4 from Yap (Yap). Slide WD_9_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.

yap19_4 — Sherd 19-4 from Yap (Yap). Slide WD_9_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.

Micaceous metavolcanic greenschist.

WD_9_7

yap43_3 — Sherd 43-3 from Yap (Yap). Slide WD_9_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.

yap43_3 — Sherd 43-3 from Yap (Yap). Slide WD_9_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.

Yap natural metavolcanic.

WD_9_8

yap43_8 — Sherd 43-8 from Yap (Yap). Slide WD_9_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.

yap43_8 — Sherd 43-8 from Yap (Yap). Slide WD_9_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.

Yap natural metavolcanic.

WD_9_10

yap14 — Sherd 14 from Yap (Yap). Slide WD_9_10 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.

yap14 — Sherd 14 from Yap (Yap). Slide WD_9_10 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 in which calcareous grains are dominant, but are admixed with minor amounts of Yap metavolcanics.

WD_9_12

yap16 — Sherd 16 from Yap (Yap). Slide WD_9_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.

yap16 — Sherd 16 from Yap (Yap). Slide WD_9_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 in which calcareous grains are dominant, but are admixed with minor amounts of Yap metavolcanics.

WD_10_11

yap15 — Sherd 15 from Yap (Yap). Slide WD_10_11 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.

yap15 — Sherd 15 from Yap (Yap). Slide WD_10_11 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 temper.

WD_9_15

yap18 — Sherd 18 from Yap (Yap). Slide WD_9_15 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.

yap18 — Sherd 18 from Yap (Yap). Slide WD_9_15 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.

Broken-sherd temper in which metavolcanic lithics indistinguishable from those of Yap metavolcanic temper also occur.

WD_9_14

yap17 — Sherd 17 from Yap (Yap). Slide WD_9_14 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.

yap17 — Sherd 17 from Yap (Yap). Slide WD_9_14 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.

Broken-sherd temper, with quartzose and cherty grains.

WD_9_1

yap13 — Sherd 13 from Yap (Yap). Slide WD_9_1 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.

yap13 — Sherd 13 from Yap (Yap). Slide WD_9_1 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.

Broken-sherd temper in which quartzose and cherty grains are abundant.

WD_9_13

yap12 — Sherd 12 from Yap (Yap). Slide WD_9_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.

yap12 — Sherd 12 from Yap (Yap). Slide WD_9_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.

Broken-sherd temper in which quartzose and cherty grains are abundant.

WD_9_16

yap19_6 — Sherd 19-6 from Yap (Yap). Slide WD_9_16 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.

yap19_6 — Sherd 19-6 from Yap (Yap). Slide WD_9_16 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.

Quartzose temper with quartz and polycrystalline quartz-albite fragments with microgranular texture, also present albite, epidote, and clinopyroxene.

WD_9_17

yap43_5 — Sherd 43-5 from Yap (Yap). Slide WD_9_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.

yap43_5 — Sherd 43-5 from Yap (Yap). Slide WD_9_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.

Quartzose.

WD_9_20

yap43_1 — Sherd 43-1 from Yap (Yap). Slide WD_9_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.

yap43_1 — Sherd 43-1 from Yap (Yap). Slide WD_9_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.

Quartzose.

References:

016 Yap 1967 (Dickinson, W.)

075 Yap, Palau 1978 (Dickinson, W.)

089 Yap 1981 (Dickinson, W.)