The BGS Lexicon of Named Rock Units — Result Details

Kincraig Formation

Computer Code: KNCG Preferred Map Code: KIN
Status Code: Full
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: Schistose to gneissose semipelite, locally phyllitic and calcareous. Banded calc-silicate rocks, quartzite, amphibolite, metacarbonate rocks and striped psammite and semipelite.
Definition of Lower Boundary: Contact typically sheared with arkosic-banded dominantly psammitic gneisses of the underlying glen banchor succession. Over large parts of the area contact zone is marked by sheet of amphibolite.
Definition of Upper Boundary: Incoming of well-bedded, grey turbiditic, locally graded psammites of the Loch Laggan Psammite Formation.
Thickness: 90 - 100 m estimated.
Geographical Limits: Middle and upper parts of Spey Valley, eastern and southern Monadhliath Mountains, Central Highlands of Scotland. Sheet 74W.
Parent Unit: Corrieyairack Subgroup (GRCO)
Previous Name(s): Grantown Formation (GTWN)
Ord Ban Subgroup (-2877)
Basal Grampian Division (-4131)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Ord Ban Hill, north-west of Loch an Eilein. 
Reference Section  Summit of Cnocan Tiumpain 
Type Section  Crags and quarries 400 m NNW of Kincraig House. 
Reference(s):
Winchester, J A and Glover, BW, 1988. The Grampian Group, in Winchester, J A [ed.]. Late Proterozoic stratigraphy of the northern Atlantic regions. Blackie, Glasgow, 146-161. 
Highton, A J, 1999. Solid geology of the Aviemore district, Memoir for 1:50000 geological sheet 74E [Scotland]. London: The Stationery Office. 97pp. 
Piasecki, M A J, 1980. New light on the Moine rocks of the Central Highlands of Scotland. Journal of the Geological Society, London, Vol. 137, p. 41 - 68. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S074 S074