Computer Code: |
HGGR |
Preferred Map Code: |
HOG |
Status Code: |
Full |
Age range: |
Devensian Stage (QD)
— Devensian Stage (QD) |
Lithological Description: |
Very dense, clast-supported diamicton comprising angular clasts of greywacke siltstone in a matrix of pale yellowish brown, silty sand. |
Definition of Lower Boundary: |
Generally an unconformable boundary on bedrock. Locally resting on reddish brown, stony clayey diamiction that possibly correlates with the Chapelknowe Till Member of the Gretna Till Formation. |
Definition of Upper Boundary: |
Sharp erosional or gradational, glacitectonic boundary with the overlying undivided Langholm Till Formation. |
Thickness: |
5m |
Geographical Limits: |
Southern Uplands of Scotland. |
Parent Unit: |
Langholm Till Formation (LHTI)
|
Previous Name(s): |
Hoghill Gravel Formation [Obsolete Name and Code: Use HGGR]
(-2235)
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Type Section |
River cliff on the southern side of the Hoghill Burn, 1km upstream of Hoghill Farm. Merritt et al. In prep: Field locality ME 312. |
Reference(s): |
McMillan, A A, Merritt, J W, Auton, C A and Golledge, N R [In preparation]. The Quaternary geology of the Solway area. BGS Research Report. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
none recorded or not applicable |