| Computer Code: |
DHGN |
Preferred Map Code: |
symb |
| Status Code: |
Full |
| Age range: |
Neoproterozoic Era (AZ)
— Neoproterozoic Era (AZ) |
| Lithological Description: |
Schistose to gneissose semipelite, generally garnetiferous. Stromatic to granoblastic migmatites in the east passing westwards into predominantly schistose rocks. |
| Definition of Lower Boundary: |
Base of dominantly semipelitic succession overlying the dominantly psammitic and quartzitic Corrydon Psammite Member in the Glen Shee area and the volcanic Farragon Volcanic Formation farther west. |
| Definition of Upper Boundary: |
Base of calcareous rocks of the overlying Loch Tay Limestone Formation. |
| Thickness: |
Not known |
| Geographical Limits: |
Glen Shee to upper Glen Isla. |
| Parent Unit: |
Ben Lui Schist Formation (BLUS)
|
| Previous Name(s): |
Duchray Hill Gneiss [Obsolete Name And Code: Use DHGN]
(DBDH)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Hillslopes on both the west and east sides of upper part of Glen Isla between Fergus and Auchavan. |
| Reference(s): |
| Crane, A, Goodman, S, Krabbendam, M K, Leslie, A G, Paterson, I B, Robertson, S, and Rollin, K. 1996. Geology of the Glen Shee district. Memoir of the British Geological Survey, Sheet 56W and adjacent areas (Scotland). |
| Williamson, W O, 1935. The composite gneiss and contaminated granodiorite of Glen Shee, Perthshire. Quarterly Journal of the Geological Society of London, Vol.91, 382-422. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S056
S065
|
