Tectonic and metamorphic history of the Upper Findhorn, Inverness-shire, Scotland

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Abstract
Synopsis: Moinian and Dalradian metasediments which surround the Findhorn Newer Granite Complex form a northwesterly extension of the Ballapell succession. The metasediments were first folded by regional-scale isoclinal F 1 folds following the Caledonian trend. These were then refolded by open, near-upright F 2 crossfolds, and later by tight, also near-upright F 3 folds trending N to NE which now often dominate the megascopic rock fabric. High grade metamorphism with widespread migmatization accompanied F 1 folding. Localized migmatization and recrystallization followed F 1 and F 2 folding, becoming more widespread after F 3 folding. A later metamorphism foliated and recrystallized a suite of early minor intrusions belonging to the Findhorn Newer Granite Complex. The Upper Findhorn rocks are situated centrally within the orthotectonic Caledonides. Their tectonic history is correlated with that of the Iltay and Ballapel Dalradians, but their thermal history is comparable with that of the Moines west of the Great Glen Fault.

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