|Latitude & Longitude (WGS84):||59° 10' 59'' North , 8° 45' 34'' East|
|Latitude & Longitude (decimal):||59.18310,8.75961|
|Other regions containing this locality:||Scandinavia|
|Köppen climate type:||Dfc : Subarctic climate|
|Name(s) in local language(s):||Høydalen, Tørdal, Drangedal kommune, Telemark fylke, Norge|
The Høydalen locality consists of 2 separate amazonite pegmatite dikes, which are situated a few hundred meters apart. The pegmatites are hosted in a Precambrian metamorphosed gabbroic rock. Both pegmatite dikes have been worked as 2 different quarries; the upper and lower quarries. Lepidolite was mined here in the period 1941-43. Occasional blasting during the years has revealed several mineral species. It is the type locality of tveitite-(Y).
For a period the quarries were opened as a touristic collecting site with an entrance fee. The quarries are now abandoned. Collecting at dumps is not allowed without permission from the landowner!
Note to the mineralist:
A study of the purple and pink micas from Høydalen, has shown that
=> the very coarse grained mica varies between polylithionite and trilithionite,
=> the coarse grained purple mica can be classified as polylithionite
=> and the medium grained purple mica consist of intergrown ferroan muscovite and polylithionite (Rosing-Schow et al. 2017).
45 valid minerals. 1 (TL) - type locality of valid minerals. 1 erroneous literature entry.
Rock Types Recorded
Select Rock List TypeAlphabetical List Tree Diagram
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
541 - 2500 Ma
|Proterozoic volcanic rocks|
Age: Proterozoic (541 - 2500 Ma)
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. 
1000 - 1600 Ma
|Proterozoic II andesite|
Age: Mesoproterozoic (1000 - 1600 Ma)
Description: undifferentiated metamorphic
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.