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h5. Beach Sand, Sri |
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Bentota beach |
| Garnet sand |
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Location:
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Bentota River area, SW Sri Lanka
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Provenance:
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High grade metamorphic rocks of the south indian craton
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Composition:
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Transparent pink garnet, metallic black cassiterite, ilmenite, rutile, prismatic-elongate zirconia
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Petrographic thin section:
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| In the bright field transparent pink | |
Bright field |
| Dark field |
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Texture:
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Medium sand (ca. 400 µ), well to moderately sorted, angular (garnet) to subangular (cassiterite)
Sample number | Collector | Date of sampling |
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heubeck0052 | Hettiavatilu | 1979 |
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Comments:
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Lanka
| !0052 - AS_Bentota_sri_lanka_p2923.jpg|thumbnail! | | !Bentota_ Sri_Lanka_mak.JPG|thumbnail! |
| Bentota beach \\
{table-cell:width=30%}
{table-cell} | Garnet sand |
| *Location* \\ | Bentota River area, SW Sri Lanka |
| *Depositional facies* \\ | _replace this with text about the dep facies_ |
| *Provenance* \\ | High grade metamorphic rocks of the south indian craton |
| *Composition* \\ | Transparent pink garnet, metallic black cassiterite, ilmenite, rutile, prismatic-elongate zirconia |
| *Texture* | Medium sand (ca. 400 µ), well to moderately sorted, angular (garnet) to subangular (cassiterite) |
h6. Petrographic thin section:
| *Description* | In the bright field transparent pink garnets with characteristic high relief, opaque cassiterite, ilmenite and rutile. In the dark field the garnets appear black, the few prismatic-elongated zirconia with high relief are transparent |
h6. Petrographic thin section:
| !Bentota_ts_II_sm1400.jpg|thumbnail! | | !Bentota_ts_x_sm1400.jpg|thumbnail! |
| Bright field \\
{table-cell:width=30%}
{table-cell} | Dark field |
| *Sample number* | heubeck0052 |
| *Collector* | Hettiavatilu |
| *Date of sampling* | 1979 |
h6. Comments:
A heavy minerals placer, characteristic for erosion products of high grade metamorphic rocks of S India in tropic climate and under intense chemical weathering
[Additional data page|geowisssand:0052 Additional data]
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