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Allondon river plain, Dardagny-Russin, Geneva, Switzerlandi
| Regional Level Types | |
|---|---|
| Allondon river plain | Alluvial Deposit |
| Dardagny-Russin | Municipality |
| Geneva | Canton |
| Switzerland | Country |
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Latitude & Longitude (WGS84):
46° 11' 57'' North , 6° 0' 8'' East
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Name(s) in local language(s):
Plaine de l'Allendon, Dardagny-Russin, Genève (Genf; Geneva), Suisse (Schweiz; Svizzera)
The Allondon River forms a wide alluvial plain of 4 x 0.3 km. The river is ending in the Rhône River. The sediments are composed of limestone from the Jura Mountains, autochthonous sandstones (molasses) and crystalline materials carried by the Rhône glacier during the last glaciations (Würm & Riss). Aar granite, Vallorcine granite, serpentinites and eclogitic rocks pebbles to boulders from Valais are very common.
The placers of Allondon are well known and have been exploited by the “orpailleurs” (gold panners) since the Middle Ages or even before. The average composition of the gold is ~Au75.5, Ag23.8, Cu0.6 atom-% (electron microprobe statistics on 200 grains, P.A. Wulser, unpublished results).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Cassiterite Formula: SnO2 Colour: black, red |
| ✪ 'Garnet Group' Formula: X3Z2(SiO4)3 |
| ⓘ Native Gold Formula: Au Description: Grains with compositions going from Au98-Ag02 to Ag70Au30. |
| ⓘ Native Silver Formula: Ag |
| ⓘ Rutile Formula: TiO2 |
| ⓘ Zircon Formula: Zr(SiO4) |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| ⓘ | Native Silver | 1.AA.05 | Ag |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Cassiterite | 4.DB.05 | SnO2 |
| ⓘ | Rutile | 4.DB.05 | TiO2 |
| Group 9 - Silicates | |||
| ⓘ | Zircon | 9.AD.30 | Zr(SiO4) |
| Unclassified | |||
| ⓘ | 'Garnet Group' | - | X3Z2(SiO4)3 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Cassiterite | SnO2 |
| O | ⓘ Rutile | TiO2 |
| O | ⓘ Zircon | Zr(SiO4) |
| O | ⓘ Garnet Group | X3Z2(SiO4)3 |
| Si | Silicon | |
| Si | ⓘ Zircon | Zr(SiO4) |
| Si | ⓘ Garnet Group | X3Z2(SiO4)3 |
| Ti | Titanium | |
| Ti | ⓘ Rutile | TiO2 |
| Zr | Zirconium | |
| Zr | ⓘ Zircon | Zr(SiO4) |
| Ag | Silver | |
| Ag | ⓘ Native Silver | Ag |
| Sn | Tin | |
| Sn | ⓘ Cassiterite | SnO2 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Wikipedia: | https://en.wikipedia.org/wiki/Allondon |
|---|---|
| Wikidata ID: | Q677867 |
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Allondon river plain, Dardagny-Russin, Geneva, Switzerland