It’s #ThinSectionThursday again so here’s a thin section of the oldest (terrestrial) rock in my collection. I collected this sample on my one month long independent mapping fieldtrip. The thin section was used in my mapping report.
|Specimen Type||Thin section|
|Full Description||A thin section of C0085, Lewisian gneiss. An orthogneiss rich in quartz and plagioclase with minor amounts of amphibole, biotite and olivine. The protolith formed 3.03-2.96Ga ago, had a tonalitic composition and was metamorphosed in the granulite facies|
|Location||Loch Assynt, Scotland|
|From Fieldtrip?||GEOL3042: Geological and Environmental Mapping, 2015-07-02 to 2015-07-31|
|Associated Notebook?||Notebook 4|
|Acquisition Date||2015-07-26 (date of rock collection, thin section obtained on 2016-01-11)|