The BGS Lexicon of Named Rock Units — Result Details
St John's Knap Sandstone Member
| Computer Code: | SJKS | Preferred Map Code: | SJKS |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Lochkovian Age (DO) — Pragian Age (DP) | ||
| Lithological Description: | Sandstone, pebbly sandstone and conglomerate. | ||
| Definition of Lower Boundary: | Passes diachronously and conformably downwards and laterally to the south into the conglomerates of the Catterline Conglomerate Formation; taken at the point where sandstone becomes predominant in the upward sequence. | ||
| Definition of Upper Boundary: | Passes diachronously and conformably upwards and laterally to the north into the Barras Conglomerate Member, taken at the point at which conglomerate becomes predominant. | ||
| Thickness: | From 230 to 345m | ||
| Geographical Limits: | Between Law of Lumgair (NO 8525 8180), and Moor of Auchendreich (NO 833 770). | ||
| Parent Unit: | Catterline Conglomerate Formation (CATC) | ||
| Previous Name(s): | Johnshaven Formation [Obsolete Name And Code: See CATC]
(JNF)
St John's Knap Sandstone Formation [Obsolete Name and Code: Use SJKS] (-3031) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | St. Johns Knap, near Roadside of Kinneff. | ||
| Reference(s): | |||
| Carroll, S. 1994. Geology of the Inverbervie and Catterline district, 1:10 000 sheets NO87NW, NO87NE and NO87SW. British Geological Survey, Technical Report, WA/94/20. | |||
| Armstrong, M, and Paterson, I B. 1970. The Lower Old Red Sandstone of the Strathmore Region. Report of the Institute of Geological Sciences No. 70/12 | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| S067 | |||