|Latitude & Longitude (WGS84):||58° 32' 3'' North , 7° 55' 21'' East|
|Latitude & Longitude (decimal):||58.53419,7.92258|
|Other regions containing this locality:||Scandinavia|
|Köppen climate type:||Dfc : Subarctic climate|
|Name(s) in local language(s):||Birkeland 3 (Topasbruddet), Birkeland, Iveland kommune, Aust-Agder fylke, Norge|
A feldspar quarry in a granite pegmatite dyke on the northern slope of the hill north of the Birkeland farm. Located about 350 m north of the farm. The pegmatite was intersected by a small younger cleavelandite-quartz dike.
Bjørlykke locality nr 103.
(Comment by Ronald Werner)
It is difficult to see how Bjørlykke came to the conclusion that this quarry was located at the north slope. There is a quarry about 350 m north of the farmhouse, but it is located at the south-east slope of the Topasfjell.
Would the quarry really be located at the north slope, then the distance from the farmhouse would be significantly more than 350 m.
The description of Frigstad (1968) is in agreement with the here presented coordinates.
About 30 m north of the here presented coordinates there seems to be another potential quarry. An aerial picture from 1972 is inconclusive.
Commodity ListThis is a list of exploitable or exploited mineral commodities recorded at this locality.
15 valid minerals.
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 crystalline metamorphic 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. 
|Mesoproterozoic - Paleoproterozoic|
1000 - 2500 Ma
|Proterozoic I gabbro|
Age: Proterozoic (1000 - 2500 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.