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h5. Dune Sand, |
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Kalahari | !mata_mata_Kalahari_sm300.jpg|thumbnail! | | !Mata-Mata_mak.JPG|thumbnail! | | Mata-Mata landscape |
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\\ www.olifants.de |
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Eolian quartz sand with clay
cutanes
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Location:
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\\ {table-cell:width=30%} {table-cell} | Eolian quartz sand with clay \\ cutanes | h6. Location: Kalahari desert, near Mata-Mata, southern Namibia, Afrika |
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h6. Provenance: |
Unknown
Unknown h6. Composition: |
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Limpid quartz, mostly with thin FeOx or clay cutanes |
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h6. Petrographic thin |
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| Exclusively limpid monocristalline |
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Bright field |
| Dark field |
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Texture:
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Fine medium sand (ca. 200 µ), very well sorted, subangular
Sample number | Collector | Date of sampling |
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heubeck0071 | W. Franke | unknown |
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Comments:
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section: | !Mata-Mata_ts_II_sm500.jpg|thumbnail,align=left! | Exclusively limpid monocristalline \\ quartz, mostly with thin FeOx or \\ clay cutanes | !Mata-Mata_ts_x.JPG|thumbnail,align=left! | | Bright field \\ | | Dark field \\ | h6. Texture: Fine medium sand (ca. 200 µ), very well sorted, subangular \\ || Sample number \\ || Collector || Date of sampling \\ || | heubeck0071 | W. Franke | unknown | h6. Comments: The excellent sorting and especially the abscence of coarse grains in combination with the high mineralogical maturity indicate an eolian transport and sedimentation |