The BGS Lexicon of Named Rock Units — Result Details

Metamorphic Aureole, Criffel-Dalbeattie Pluton

Computer Code: MACD Preferred Map Code: notEntered
Status Code: Full
Age range: Devonian Period (D) — Devonian Period (D)
Lithological Description: Rocks of the Carghidown and Ross Formations (Hawick Group) and Siluro - Devonian minor intrusions are metamorphosed to biotite- or hornblende-diopside hornfels within the thermal metamorphic aureole of the Criffel-Dalbeattie Pluton.
Definition of Lower Boundary: Outer boundary of the aureole is gradational but mapped at the first occurrence of rocks of mauvish-brown colour that are indurated by growth of biotite.
Definition of Upper Boundary: Margin of the Criffel-Dalbeattie Pluton.
Thickness: Mapped as between 1 and 3.2km in width.
Geographical Limits: Aureole rocks are exposed along the northern margin of the Criffel-Dalbeattie intrusion from Lochanhead [NX 92 72] to Loach Burn [NX 79 58] where it merges with the thermal aureole around the older Bengairn intrusion. Aureole rocks are exposed along the southern margin of the Criffel-Dalbeattie intrusion at Almorness Point [NX 84 52] and along the coast from Castlehill Point [NX 85 53] to the River Nith [NX 99 66].
Parent Unit: Not Applicable (-)
Previous Name(s): Metamorphic Aureole Around The Criffel-Dalbeattie Pluton (-5074)
Alternative Name(s): none recorded or not applicable
Reference Section  Traverse from the margin of the Criffel-Dalbeattie intrusion near Buittle Place through the aureole rocks to the mapped limit of thermal metamorphosed rocks near West Logan. 
Horne, J, Peach, B N and Teall, J J H, 1896. Explanation of Sheet 5, Kirkcudbrightshire. Memoir of the Geological Survey, Scotland. 
Lintern, B C and Floyd, J D. 2000. Geology of the Kirkcudbright-Dalbeattie District. Memoir of the British Geological Survey, Sheets 5W, 5E and part of 6W (Scotland). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S005 S006 S009