| 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
|
| Stratotypes: |
| 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. |
| Reference(s): |
| 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
|
