E-PICS - ETHBIB.Bildarchiv
Dia_363-0854
DE: Thin section of plane-polarized light of a void lined with small mamelons of botryoidal aragonite
EN: Thin section of plane-polarized light of a void lined with small mamelons of botryoidal aragonite
| Record Name | Dia_363-0854 |
|---|---|
| Photographer | Unbekannt |
| Dating | 1965-2010 |
| Caption | Title Register of the original deposit: Carbonate rocks: marine cements. Reef-wall limestone from 110m, Tobacco Reef transect. Characteristic sweeping extinction and coalescing growth is seen in these small mamelons growing from ceiling, side, and geopetal floor. In mamelon at lower left, grwoth of right half was interrupted and then resumed with a slightly different orientation: it was then subsequently buried by fine-grained internal sediment that extends as a lamination of floating grains through left half of mamelon, where growth of aragonite was continuous. This final generation of internal sediment is distinctly finer grained than earlier one on which mamelons are rooted. Compound mamelon on right grew on coral: those on ceiling grew on a cemented sediment of coral debris, peloids, and other skeletal grains: and those rooted on floor grew on well-sorted, silt-sized peloids that were probably cemented. Irregular holes in mamelons and sediment at lower left are artifacts of sectioning. |
| Caption (German) | Titel Register der Originalablage: Carbonate rocks: marine cements. Reef-wall limestone from 110m, Tobacco Reef transect. Characteristic sweeping extinction and coalescing growth is seen in these small mamelons growing from ceiling, side, and geopetal floor. In mamelon at lower left, grwoth of right half was interrupted and then resumed with a slightly different orientation: it was then subsequently buried by fine-grained internal sediment that extends as a lamination of floating grains through left half of mamelon, where growth of aragonite was continuous. This final generation of internal sediment is distinctly finer grained than earlier one on which mamelons are rooted. Compound mamelon on right grew on coral: those on ceiling grew on a cemented sediment of coral debris, peloids, and other skeletal grains: and those rooted on floor grew on well-sorted, silt-sized peloids that were probably cemented. Irregular holes in mamelons and sediment at lower left are artifacts of sectioning. |
| Physical description | Fotografie : Diapositiv |
| Format | 2,4 x 3,6 cm |
| Colour | farbig |
| Orientation | Querformat |
| Categories |
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| License | CC BY-SA 4.0 |
| Copyright notice | ETH-Bibliothek Zürich, Bildarchiv / Fotograf: Unbekannt / Dia_363-0854 / CC BY-SA 4.0 |
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