| Computer Code: |
CRFJ |
Preferred Map Code: |
CRFJ |
| Status Code: |
Full |
| Age range: |
Carboniferous Period (C)
— Cisuralian Epoch (PLC) |
| Lithological Description: |
Dyke of porphyritic nepheline gabbro intruded into Ordovician wackes of the Southern Uplands Terrane. |
| Definition of Lower Boundary: |
Intrusive. |
| Definition of Upper Boundary: |
Intrusive. |
| Thickness: |
Dyke, about 33m wide and 200+m long orientated NW - SE. |
| Geographical Limits: |
Crawfordjohn area. |
| Parent Unit: |
Midland Valley Carboniferous To Early Permian Alkaline Basic Dyke Suite (MCPAD)
|
| Previous Name(s): |
Crawfordjohn Essexite [Obsolete Name and Code: Use CRFJ]
(-1458)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Craighead Quarry, between Abington and Crawfordjohn, Lanarkshire. |
| Reference(s): |
| Scott, A, 1915. The Crawfordjohn Essexite and associated rocks. Geological Magazine, Decade 6, Vol.2, Nos 616/617, 455 - 461 and 513 - 519. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S015
|
