| Computer Code: |
HFPM |
Preferred Map Code: |
SYMB |
| Status Code: |
Full |
| Age range: |
Neoproterozoic Era (AZ)
— Neoproterozoic Era (AZ) |
| Lithological Description: |
Pelite and semipelite, generally very fine-grained, dark grey to black, often with a prominant slaty cleavage, with rare lenses of fine-grained psammite. |
| Definition of Lower Boundary: |
Marked by the incoming of more homogenous pelitic slaty rocks within the host Macduff Formation grits, psammites and pelites. |
| Definition of Upper Boundary: |
Marked by the incoming of gritty, more heterogeneous rocks of the host Macduff Formation. |
| Thickness: |
Unknown, because of complications due to folding. |
| Geographical Limits: |
The member crops out in a c.1km wide linear belt from the northern margin of Boganclogh Basic Intrusion (NJ3045) to a point c.2km north east of Hull of Tillymorgan at c.(NJ675355). |
| Parent Unit: |
Macduff Formation (MCD)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Extensive old quarries on Hill of Foudland. |
| Reference(s): |
| none recorded or not applicable |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S086
S086
|
