Pohnpei

Wikidata ID: Q7771127

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

Geonames ID: 2081550       Getty Thesaurus of Geographic Names ID: 7018510

Mindat Loc ID: 405502

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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
tpr210 ** 6 0 3 2 0 3 1 0 0 0 0 4 0 0 vitric, lathwork
Pohnpei hybrid 5 0 1 1 0 1 0 0 0 0 0 1 0 0 Carolines
tpr211 ** 0 0 2 3 0 4 1 0 0 0 0 5 0 0 vitric, microlitic
Pohnpei lithic 0 0 1 1 0 3 1 0 0 0 0 4 0 0 Carolines
tpr212 ** 0 5 0 0 0 0 0 0 5 0 0 0 0 0 na
Exotic Pohnpei quartzose 0 5 0 0 0 0 0 0 5 0 0 0 0 0 Carolines
tpr493 ** 0 0 0 0 0 4 0 0 0 0 0 5 0 6 lathwork, vitric
Pohnpei grog 0 0 0 0 0 2 0 0 0 0 0 3 0 4 Carolines
tpr494 0 0 1 4 0 2 0 0 0 0 0 4 0 0 lathwork, vitric
Pohnpei placer 0 0 1 4 0 2 0 0 0 0 0 4 0 0 Carolines

Slides:

Slide Fabric Possible OriginCal. QuartzFeldspar Pyroxene Amphibole Opaques OlivineBiotite Muscovite Epidote Garnet/ Spinel Ig./Met. Rocks Sed. Rocks Grog Lithics
WD_90_1 tpr210 (Pohnpei hybrid) Pohnpei 5 0 2 2 0 1 1 0 0 0 0 3 0 0 vitric, microlitic
WD_90_4 tpr211 (Pohnpei lithic) Pohnpei 0 0 2 3 0 3 1 0 0 0 0 4 0 0 vitric, microlitic
WD_90_7 tpr211 (Pohnpei lithic) Pohnpei 0 0 1 1 0 4 1 0 0 0 0 5 0 0 vitric, microlitic
WD_90_8 tpr212 (Exotic Pohnpei quartzose) Japan 0 5 0 0 0 0 0 0 5 0 0 0 0 0 na
FL_1_89 tpr493 (Pohnpei grog) Pohnpei 0 0 0 0 0 2 0 0 0 0 0 5 0 5 Vitric, lathwork
FL_1_64 tpr493 (Pohnpei grog) Pohnpei 0 0 0 0 0 4 0 0 0 0 0 3 0 4 vitric, lathwork
FL_1_65 tpr493 (Pohnpei grog) Pohnpei 0 0 0 0 0 2 0 0 0 0 0 4 0 5 vitric, lathwork
FL_1_74 tpr493 (Pohnpei grog) Pohnpei 0 0 0 0 0 2 0 0 0 0 0 4 0 5 vitric, lathwork
FL_1_75 tpr494 (Pohnpei placer) Pohnpei 0 0 1 4 0 2 0 0 0 0 0 4 0 0 vitric, lathwork
FL_1_78 tpr210 (Pohnpei hybrid) Pohnpei 5 0 2 1 0 2 1 0 0 0 0 2 0 0 vitric, lathwork
FL_1_66 tpr210 (Pohnpei hybrid) Pohnpei 6 0 0 1 0 3 1 0 0 0 0 1 0 0 vitric

WD_90_1

Len1 Len1
Sherd Len1 from Lenger (Lenger). Slide WD_90_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.

Hybrid temper sand of mixed calcareous and terrigenous grains. Optically amorphous chitinous grains of tan coloration derived from crab or echinoid shells. Glassy rock fragments, microcrystalline volcanic rock fragments, clinopyroxenes, opaques, plagioclase.


WD_90_4

Len4 Len4
Sherd Len4 from Lenger (Lenger). Slide WD_90_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.

Non-calcareous volcanic temper of lithic sand. Moderately sorted and subrounded medium to coarse temper sands displaying placer concentration of opaque iron oxide grains (probably magnetite), glassy rock fragments, and clinopyroxene. Temper probably from stream.


WD_90_7

Len7 Len7
Sherd Len7 from Lenger (Lenger). Slide WD_90_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.

Non-calcareous volcanic temper of lithic sand.


WD_90_8

Len8 Len8
Sherd Len8 from Lenger (Lenger). Slide WD_90_8 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.

Fine quartzose sand that is distinctly micaceous, with prominent dispersed flakes of white mica (muscovite).


FL_1_89

NanMadol_37_93_2 NanMadol_37_93_2
Sherd 37NM93 from Nan Madol (Pohnpei). Slide FL_1_89 from Leach Collection, Auckland University. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image or full slide in VIMIPO with higher exposure. Imaged by K. Hardy and M. Leclerc, ANU.

Grog and lithic. Lithics could be naturally part of clay. Higher exposure has brigher XPL.


FL_1_64

NanMadol_191_93 NanMadol_191_93
Sherd 191-93 from Nan Madol (Pohnpei). Slide FL_1_64 from Leach Collection, Auckland University. 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.

Grog and lithics.


FL_1_65

NanMadol_185A NanMadol_185A
Sherd NM185-93 from Nan Madol (Pohnpei). Slide FL_1_65 from Leach Collection, Auckland University. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image or full slide in VIMIPO with higher exposure. Imaged by K. Hardy and M. Leclerc, ANU.

Grog and lithics. Higher exposure has brigher XPL.


FL_1_74

NanMadol_177_93 NanMadol_177_93
Sherd 177-93 from Nan Madol (Pohnpei). Slide FL_1_74 from Leach Collection, Auckland University. 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.

Grog and lithics


FL_1_75

NanMadol_164_115_a NanMadol_164_115_a
Sherd 164-115 from Nan Madol (Pohnpei). Slide FL_1_75 from Leach Collection, Auckland University. 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 lithics mixed with sand.


FL_1_78

NanMadol_173_93 NanMadol_173_93
Sherd 173-93 from Nan Madol (Pohnpei). Slide FL_1_78 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 reef debris hybrid.


FL_1_66

NanMadol_215_93 NanMadol_215_93
Sherd 215-93 from Nan Madol (Pohnpei). Slide FL_1_66 from Leach Collection, Auckland University. 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 reef debris hybrid.


References:

267 Lenger, Pohnpei, Caroline, 2008 (Dickinson, W.)

108 Pohnpei, Caroline, 1993 (Dickinson, W.)