The BGS Lexicon of Named Rock Units — Result Details
Auchencar Sandstone Formation
| Computer Code: | AUSA | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Early Devonian Epoch (DL) — Early Devonian Epoch (DL) | ||
| Lithological Description: | Red lithic sandstones, quartzite conglomerates and lava pebble conglomerates common towards the top of the succession, withnd one grey pyroxene andesite lava intercalation. | ||
| Definition of Lower Boundary: | The top of the Basal Quartz Sandstone Formation. | ||
| Definition of Upper Boundary: | The sandstone of the Auchencar Sandstone Formation, and the top of the Creag Mhor Conglomerate Member are overlain by the base of the Machrie Burn and Allt an Brighide Siltstones of the Am Binnein Sandstone Formation. | ||
| Thickness: | About 450 - 500 m thick. | ||
| Geographical Limits: | Machrie to Glen Rosa, Arran. | ||
| Parent Unit: | Arbuthnott-Garvock Group (ATGK) | ||
| Previous Name(s): | Auchencar Lava [Obsolete Name and Code: Use AULA, AUSA]
(-1959)
Auchencar Burn Sandstones [Obsolete Name and Code: Use AUSA] (-1319) Creag Mhor Conglomerates (-661) Torr Breac Sandstones [Obsolete Name and Code: Use AUSA] (-32) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Partial Type Section | The lower part of the formation, in the Auchencar Burn. Browne, et al., 2000; Friend, et al., 1963. | ||
| Partial Type Section | The upper part of the formation, in the Machrie Burn. Browne, et al., 2000; Friend, et al., 1963. | ||
| Reference(s): | |||
| Browne, M A E, Smith, R A, and Aitken, A M. 2002. Stratigraphical framework for the Devonian (Old Red Sandstone) rocks of Scotland south of a line from Fort William to Aberdeen. British Geological Survey Research Report RR/01/04. 67 pp. | |||
| Friend, P F, Harland, W B and Hudson, J D, 1963. The Old Red Sandstone and the Highland Boundary in Arran, Scotland. Transactions of the Edinburgh Geological Society, Vol.19, 363-425. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| S338 | |||