| Computer Code: |
LMR |
Preferred Map Code: |
notEntered |
| Status Code: |
Full, pending ratification |
| Age range: |
Proterozoic Eon (AP)
— Proterozoic Eon (AP) |
| Lithological Description: |
Hornblende and quartz-mica schists with minor graphitic, quartz-magnetite, quartz-carbonate and garnet-cummingtonite schists with sulphide horizons. |
| Definition of Lower Boundary: |
Drawn at base of interdigitated schists and gneisses of Loch Maree Group which rests unconformably on high grade acid gneisses of Badcallian age (Archaean). |
| Definition of Upper Boundary: |
Drawn at unconformable upward passage from schists of the Loch Maree Group to clastic rocks of the Torridonian including the Torridon Sandstone. |
| Thickness: |
Not known. |
| Geographical Limits: |
Gairloch and north-east of Loch Maree, north-west Highlands, Scotland. |
| Parent Unit: |
Not Applicable (-)
|
| Previous Name(s): |
Loch Maree Series [Obsolete Name and Code: Use LMR]
(-1035)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Gairloch, north-west Highlands, Scotland. |
| Type Area |
Loch Maree, north-west Highlands, Scotland. |
| Reference(s): |
| Cattell, A. 1988. Anorthosite xenoliths in the Loch Maree Group meta-basalts. Scottish Journal of Geology, Vol.24 (3), 201-213. |
| Jones, E and others, 1987. Lower Proterozoic stratiform sulphides deposits in Loch Maree Group, Gairloch, north-west Scotland. Transactions of the Institute of Mining and Metallurgy, Section B, Applied Earth Sciences, Vol.96, p.B128-B140. |
| Hicks, H, 1883. On the metamorphic and overlying rocks in parts of Ross and Inverness-shire. Quarterly Journal of the Geological Society, Vol.39, p.141-159. |
| Peach, B N and Horne, J, 1930. Chapters on the Geology of Scotland. [Oxford.] |
| Peach, B N, 1913. The Geology of the Fannich Mountains and the country around Upper Loch Maree and Strath Broom. Memoirs of the Geological Survey of Great Britain, Scotland. |
| Floyd, P A and others. 1989. Geochemistry and tectonic setting of Lewisian clastic metasediments from the early Proterozoic Loch Maree Group of Gairloch, north-west Scotland. Precambrian Research, Vol.45, p.203-214. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S092
S091
|
