| Computer Code: |
STAY |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Devensian Stage (QD)
— Holocene Epoch (QH) |
| Lithological Description: |
In the Tay valley catchment, especially the Tay and its major tributaries, the formation consists of a wide range of lithologies encompassing pebbles, fine to coarse gravel, cobbles and boulders in a sandy matrix and coarse- to fine-grained sand, silt and clay. Peat and beds rich in organic remains occur in the floodplain deposits. |
| Definition of Lower Boundary: |
Unconformably overlies older Quaternary deposits and bedrock. |
| Definition of Upper Boundary: |
Normally the land surface. |
| Thickness: |
From a veneer to several metres. |
| Geographical Limits: |
Onshore, recognized in the Tay catchment area as the alluvial deposits of the River Tay and all of its tributaries, from highest to lowest order. Includes valleys of the Earn, Eden, Almond, Isla, Tummel and Garry. |
| Parent Unit: |
Tay Catchments Subgroup (TAYCA)
|
| Previous Name(s): |
Fluvial alluvium [Obsolete Name and Code: Use STAY]
(-3051)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Tay valley upstream from the tidal limit at Perth to the outlet of Loch Tay at Kenmore. |
| Reference(s): |
| McMillan, A A, Hamblin, R J O, and Merritt, J W. 2011. A lithostratigraphical framework for onshore Quaternary and Neogene (Tertiary) superficial deposits of Great Britain and the Isle of Man. British Geological Survey Research Report, RR/10/03. 343pp. |
| Armstrong, M, Paterson, I B, and Browne, M A E. 1985. Geology of the Perth and Dundee district. Memoir of the British Geological Survey, Sheets 48W, 48E and 49 (Scotland). 108pp. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S047
S048
S048
S049
|
