The BGS Lexicon of Named Rock Units — Result Details

Ailsa Craig Microgranite

Computer Code: AILC Preferred Map Code: AIL
Status Code: Full
Age range: Palaeogene Period (G) — Palaeogene Period (G)
Lithological Description: Circular microgranite intrusion also intruded by dolerite dykes.
Definition of Lower Boundary: Intrusive contact.
Definition of Upper Boundary: Intrusive contact.
Thickness: c.1 square km in total area (circular).
Geographical Limits: Limited to the island of Ailsa Craig.
Parent Unit: Hebridean Province (HBRID)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Reference Section  Island in Firth of Clyde, c.16km west of Girvan. Harrison et al. 1987. 
Harrison, R K, Stone, P, Cameron, I B, Elliot, R W and Harding, R R, 1987. Geology, petrology and geochemistry of Ailsa Craig, Ayrshire. Report of the British Geological Survey, Vol. 16, No. 9. 
1:50K maps on which the lithostratigraphical unit is found, and map code used: