| Computer Code: |
LVBM |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Early Devonian Epoch (DL)
— Early Devonian Epoch (DL) |
| Lithological Description: |
Fine to coarse sandstone with beds of pebbly sandstone and conglomerate and occassional thin beds or lenses of olive green siltstone. |
| Definition of Lower Boundary: |
The unit conformably overlies conglomerates of the Ousdale Arkose Formation, and unconformably overlies (onlaps) the psammites and pelites of the Glenfinnan Group. |
| Definition of Upper Boundary: |
The unit is interpreted to conformably underlie the Raddery Sandstone Formation but the contact is not seen. |
| Thickness: |
The thickness of the unit is poorly constrained due to the irregular topography of the unconformity surface with the metamorphic rocks of the Glenfinnan Group, and an absence of exposure of the higher parts of the unit in the Inner Beauly Firth. The thickness may range from tens of meters to over 200m. |
| Geographical Limits: |
The unit occurs in the vicinity of the town of Beauly, approximately 15km west of Inverness, underlying a tract of low ground between the area of Broallan to the west, Inchmore to the east, Kiltarlity to the south and the inner Beauly Firth to the north. |
| Parent Unit: |
Ousdale Arkose Formation (OA)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Exposures in disused quarries and the streams of the Allt a Ghaireil and Red Burn near Inchrory, to the west of Beauly, near Inverness. Sheet 83E. NH54NW |
| Reference(s): |
| none recorded or not applicable |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S083
|
