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0142
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Eolian
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sand,
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Mongolia
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...
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Location:
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Zuun mod Elstei, 50 km east of Ulaanbaatar, Mongolia; E 107°28'55.1";
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N
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47°47'27.5"
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Provenance:
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Mix
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of
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(1)
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granitoid
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plutonic
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rocks
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and
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(2)
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low-medium-grade
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metasedimentary
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(schist,
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marble)
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and
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possibly
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metavolcanic
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rocks.
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Composition:
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Mix of
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translucent
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-
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transparent
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quartz
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with
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pink
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feldspar,
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white
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marble
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and
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grey-green
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low-grade
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metamorphic
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rocks
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(schists);
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possibly
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also
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higher-grade
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metamorphic
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rocks
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involved.
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Few heavy
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minerals,
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including
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garnets.
...
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Glass bead is 200µm in diameter.
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Texture:
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Characteristic eolian texture: Medium grained (mL-MU;
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mean
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ca.
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350
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µ),
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well
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sorted,
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depending
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on
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mineralogy
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poorly
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to
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well
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rounded.
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Characteristic
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polished,
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matted
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("frosted")
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grain
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surfaces
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typical
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of
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eolian
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transport.
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Sample
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Number:
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heubeck014
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Collector:
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Dr. Ochirbat Batkhishig, Institute of Geography, Mongolian Academy of Sciences, Mongolia.
January, 2008
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Comments:
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Characteristic eolian texture: Medium grained (mL-MU; mean ca. 350 µ), well sorted, depending on mineralogy poorly to well rounded. Characteristic polished, matted ("frosted") grain surfaces typical of eolian transport.
