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Østerådalen, Østerå, Tvedestrand, Agder, Norwayi
| Regional Level Types | |
|---|---|
| Østerådalen | Quarry |
| Østerå | Hamlet |
| Tvedestrand | Municipality |
| Agder | County |
| Norway | Country |
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Latitude & Longitude (WGS84):
58° 38' 20'' North , 8° 57' 20'' East
Latitude & Longitude (decimal):
Type:
Deposit first discovered:
1842
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Tvedestrand | 1,975 (2016) | 2.4km |
| Myra | 544 (2014) | 13.4km |
| Risør | 4,475 (2016) | 18.5km |
| Eikeland | 408 (2012) | 19.7km |
| Arendal | 30,916 (2017) | 22.4km |
Other/historical names associated with this locality:
Oesteraa
Other Languages:
Norwegian:
Østerådalen, Tvedestrand, Agder, Norge
A classic sunstone (aventurine feldspar) locality discovered by Weibye in 1842. Occurred in a clear quartz in a pegmatite embedded in gneiss. The locality is now considered emptied.
The coordinates are approximate, needs to be confirmed.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
5 valid minerals.
Rock Types Recorded
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Albite Formula: Na(AlSi3O8) Description: An analysis of the Sunstone, (aventurine feldspar) showed it to be oligoclase (Webye 1848) |
| ⓘ Albite var. Oligoclase Formula: (Na,Ca)[Al(Si,Al)Si2O8] Description: An analysis of the Sunstone, (aventurine feldspar) showed it to be oligoclase (Webye 1848) |
| ⓘ 'Amphibole Supergroup' Formula: AB2C5(T8O22)W2 |
| ⓘ 'Apatite' Formula: Ca5(PO4)3A |
| ⓘ 'Biotite' Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 References: |
| ⓘ Cordierite Formula: Mg2Al4Si5O18 |
| ⓘ 'Feldspar Group' |
| ⓘ 'Feldspar Group var. Sunstone' References: |
| ⓘ Hematite Formula: Fe2O3 |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Zircon Formula: Zr(SiO4) |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Hematite | 4.CB.05 | Fe2O3 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 9 - Silicates | |||
| ⓘ | Zircon | 9.AD.30 | Zr(SiO4) |
| ⓘ | Cordierite | 9.CJ.10 | Mg2Al4Si5O18 |
| ⓘ | Albite | 9.FA.35 | Na(AlSi3O8) |
| ⓘ | var. Oligoclase | 9.FA.35 | (Na,Ca)[Al(Si,Al)Si2O8] |
| Unclassified | |||
| ⓘ | 'Amphibole Supergroup' | - | AB2C5(T8O22)W2 |
| ⓘ | 'Biotite' | - | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| ⓘ | 'Feldspar Group' | - | |
| ⓘ | 'var. Sunstone' | - | |
| ⓘ | 'Apatite' | - | Ca5(PO4)3A |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| O | Oxygen | |
| O | ⓘ Albite | Na(AlSi3O8) |
| O | ⓘ Amphibole Supergroup | AB2C5(T8O22)W2 |
| O | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| O | ⓘ Cordierite | Mg2Al4Si5O18 |
| O | ⓘ Hematite | Fe2O3 |
| O | ⓘ Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Zircon | Zr(SiO4) |
| O | ⓘ Apatite | Ca5(PO4)3A |
| F | Fluorine | |
| F | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Na | Sodium | |
| Na | ⓘ Albite | Na(AlSi3O8) |
| Na | ⓘ Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
| Mg | Magnesium | |
| Mg | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Mg | ⓘ Cordierite | Mg2Al4Si5O18 |
| Al | Aluminium | |
| Al | ⓘ Albite | Na(AlSi3O8) |
| Al | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Al | ⓘ Cordierite | Mg2Al4Si5O18 |
| Al | ⓘ Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
| Si | Silicon | |
| Si | ⓘ Albite | Na(AlSi3O8) |
| Si | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Si | ⓘ Cordierite | Mg2Al4Si5O18 |
| Si | ⓘ Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Zircon | Zr(SiO4) |
| P | Phosphorus | |
| P | ⓘ Apatite | Ca5(PO4)3A |
| K | Potassium | |
| K | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Ca | Calcium | |
| Ca | ⓘ Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
| Ca | ⓘ Apatite | Ca5(PO4)3A |
| Ti | Titanium | |
| Ti | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Fe | Iron | |
| Fe | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Fe | ⓘ Hematite | Fe2O3 |
| Zr | Zirconium | |
| Zr | ⓘ Zircon | Zr(SiO4) |
Other Regions, Features and Areas containing this locality
Eurasian PlateTectonic Plate
- Baltic Shield
- Sveconorwegian BeltShield
EuropeContinent
Norway
- ⭔Aust-AgderCounty
ScandinaviaRegion
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Østerådalen, Østerå, Tvedestrand, Agder, Norway