The surinamite-bearing gneiss is found in a small outcrop about 0.5 km south of Roineabhal summit. This gneiss occurs as a thin layer not exceeding 1 m in thickness within orthopyroxene-bearing quartzofeldspathic gneiss.
8 valid minerals.
Rock Types Recorded
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Entries shown in red are rocks recorded for this region.
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.
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541 - 2500 Ma
|Loch Maree Group|
Age: Proterozoic (541 - 2500 Ma)
Stratigraphic Name: Lewisian Complex
Reference: British Geological Survey. DiGMapGB-625. British Geological Survey ©NERC. 
541 - 4000 Ma
|Precambrian crystalline metamorphic rocks|
Age: Precambrian (541 - 4000 Ma)
Lithology: Amphibolite; orthogneiss
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 gneiss|
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. 
Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License
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Baba, S., Grew, E. S., Shearer, C. K., & Sheraton, J. W. (2000). Surinamite: A high-temperature metamorphic beryllosilicate from Lewisian sapphirine-bearing kyanite-orthopyroxene-quartz-potassium feldspar gneiss at South Harris, NW Scotland. American Mineralogist, 85(10), 1474-1484. https://www.researchgate.net/profile/Sotaro_Baba/publication/279641823_Surinamite_A_high-temperature_metamorphic_beryllosilicate_from_Lewisian_sapphirine-bearing_kyanite-orthopyroxene-quartz-potassium_feldspar_gneiss_at_South_Harris_NW_Scotland/links/568d9cb008aeaa1481ae7a49.pdf