The BGS Lexicon of Named Rock Units — Result Details
Cascade Conglomerate Member
| Computer Code: | CSC | Preferred Map Code: | CSC |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Caradoc Series (O4) — Caradoc Series (O4) | ||
| Lithological Description: | A localised thick conglomerate unit at or near the top of the generally flaggy Ardwell Farm Formation. Thickly bedded. Grey-green and buff- to yellow-weathering grits with scattered pebbles and boulders up to 60cm across of dolerite, spilite, gabbro, granophyre, granite and olive green mudstone rafts in a slightly calcareous matrix. | ||
| Definition of Lower Boundary: | Base of conglomerate, resting on flaggy sandstone. | ||
| Definition of Upper Boundary: | Taken at the top of the conglomerate and return to flaggy sandstone. | ||
| Thickness: | To 200m | ||
| Geographical Limits: | Girvan area, Southwest Scotland. | ||
| Parent Unit: | Ardwell Farm Formation (ARD) | ||
| Previous Name(s): | Cascade Beds [Obsolete Name and Code: Use CSC]
(-4572)
Cascade Grits and Conglomerates [Obsolete Name and Code: Use CSC] (-3965) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Penwhapple Burn, Girvan. | ||
| Reference(s): | |||
| Lapworth, C, 1882. The Girvan Succession. Quarterly Journal of the Geological Society of London, Vol. 38, 537-666. | |||
| Williams, A, 1962. The Barr and Lower Ardmillan Series (Caradoc) of the Girvan district, southwest Ayrshire, with descriptions of the Brachiopoda. Memoir of the Geological Society of London, No.3. | |||
| Fortey, R A, Harper, D A T, Ingham, J K, Owen, A W, Parkes, M A, Rushton, A W A and Woodcock, N H. 2000. A revised correlation of Ordovician rocks in the British Isles. Geological Society Special Report, No.24. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| none recorded or not applicable | |||