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Halvfarmyra, Åmli, Aust-Agder, Norwayi
Regional Level Types
HalvfarmyraOccurrence
ÅmliMunicipality
Aust-AgderCounty
NorwayCountry

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Name in Norwegian:Halvfarmyra, Åmli, Aust-Agder, Norge
Latitude & Longitude (WGS84): 58° 40' 22'' North , 8° 41' 57'' East
Latitude & Longitude (decimal): 58.67280,8.69930
GeoHash:G#: u4qjvcn9u
Locality type:Occurrence
Köppen climate type:Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Myra544 (2014)12.7km
Tvedestrand1,975 (2016)14.6km
Åmli572 (2016)16.2km
Arendal30,916 (2017)23.9km
Eikeland408 (2012)27.1km
Other/historical names associated with this locality:Halvfarmyr


Sillimanite-locality east of the town of Tvedstrand, discovered by Weibye in 1842.

Coordinates are for the place called Halvfarmyra, east of the town of Tvedestrand. Needs to be confirmed for the sillimanite-locality by visit in the field.
Modern maps spell this locality as "Halvfarmyra", while old literature spells it as "Halvfarmyr".


Coordinates © Kartverket - https://www.kartverket.no

Regions containing this locality

Eurasian PlateTectonic Plate
EuropeContinent
Fennoscandian ShieldShield
ScandinaviaRegion

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


2 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Quartz
Formula: SiO2
Reference: Weibye, P. C. (1848): Beiträge zur topograpischen Mineralologie Norwegens. Archiv für Mineralogie, Geognosie, Bergbau und Hüttenkunde. 22: 465-544
Sillimanite
Formula: Al2(SiO4)O
Reference: Weibye, P. C. (1848): Beiträge zur topograpischen Mineralologie Norwegens. Archiv für Mineralogie, Geognosie, Bergbau und Hüttenkunde. 22: 465-544

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 9 - Silicates
Sillimanite9.AF.05Al2(SiO4)O

List of minerals arranged by Dana 8th Edition classification

Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [4] and >[4] coordination
Sillimanite52.2.2a.1Al2(SiO4)O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2

List of minerals for each chemical element

OOxygen
O SillimaniteAl2(SiO4)O
O QuartzSiO2
AlAluminium
Al SillimaniteAl2(SiO4)O
SiSilicon
Si SillimaniteAl2(SiO4)O
Si QuartzSiO2

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Proterozoic
541 - 2500 Ma



ID: 3186372
Proterozoic crystalline metamorphic rocks

Age: Proterozoic (541 - 2500 Ma)

Lithology: Granitoid gneiss; orthogneiss/paragneiss

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Mesoproterozoic
1000 - 1600 Ma



ID: 3140877
Proterozoic II granite

Age: Mesoproterozoic (1000 - 1600 Ma)

Lithology: Major:{granite}, Minor{monzonite,meta-granite,meta-monzonite}

Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3. [147]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Weibye, P. C. (1848): Beiträge zur topograpischen Mineralologie Norwegens. Archiv für Mineralogie, Geognosie, Bergbau und Hüttenkunde. 22: 465-544


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