Site: Ira Ara

Island: Timor       Lithology: NA ( Nunn et al. (2016) )

Lithology: Limestone ( Dickinson (2006) )

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

Near/In Geonames ID: 1942984       Wikidata ID: Q83067       Getty Thesaurus of Geographic Names ID: None

Mindat Loc ID: None


In:

Timor Island Wikidata ID: Q83067

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. QuartzFeldspar Pyroxene Amphibole Opaques OlivineBiotite Muscovite Epidote Garnet/ SpinelIg./Met. Rocks Sed. Rocks Grog Lithics/ Region
tpr200 6 2 2 0 0 0 0 0 0 0 0 0 0 0 limeclast
Telepunu calcareous 6 1 1 0 0 0 0 0 0 0 0 0 0 0 Maluku
tpr202 3 3 0 0 0 1 0 0 0 0 0 1 6 0 quartzite, tectonite
Buru hybrid 2 3 0 0 0 1 0 0 0 0 0 0 6 0 Maluku

Slides:

Slide Fabric Possible OriginWareCal. QuartzFeldspar Pyroxene Amphibole Opaques OlivineBiotite Muscovite Epidote Garnet/ Spinel Ig./Met. Rocks Sed. Rocks Grog Lithics
WD_86_10 tpr200 (Telepunu calcareous) Timor 6 1 1 0 0 0 0 0 0 0 0 0 0 0 limeclast
WD_86_11 tpr202 (Buru hybrid) Buru 2 3 0 0 0 1 0 0 0 0 0 0 6 0 quartzite, tectonite

WD_86_10

IraAraET4 IraAraET4
Sherd ET4 from Ira Ara (Timor). Slide WD_86_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.

Hybrid sand composed predominantly of calcareous limeclasts made of diagenetic microspar, with which subordinate terrigenous grains of quartz and feldspar. Derived from the erosion of indurated limestone on Timor.


WD_86_11

IraAraET5 IraAraET5
Sherd ET5 from Ira Ara (Timor). Slide WD_86_11 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 coastal sand (metamorphic terrigenous detritus). Moderately to well sorted, subrounded hybrid (mixed calcareous and terrigenous aggregate) temper sands of presumed beach origin in which terrigenous grains were derived from foliated metasedimentary bedrock.


References:

295 summary, East Timor, 2011 (Dickinson, W.)

291 Ira Ara, East Timor, 2011 (Dickinson, W.)