| Computer Code: |
CSMG |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Hettangian Age (JH)
— Hettangian Age (JH) |
| Lithological Description: |
The limestone unit infills a pre-existing palaeokarstic surface and comprises clasts of Ordovician limestone (Durness Group), within an early Jurassic, yellowish, crinoid-rich, micrite matrix. |
| Definition of Lower Boundary: |
Unconformable on a palaeokarstic surface eroded into Ordovician dolostones of the Durness Group. |
| Definition of Upper Boundary: |
Separated by a dolerite sill from overlying fissile mudstones and limestones of the Breakish Formation; Farris et al (1999) suggested that, apart from the sill, the sequence is conformable. |
| Thickness: |
<1 m. |
| Geographical Limits: |
Sea of the Hebrides Basin. |
| Parent Unit: |
Lias Group (LI)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
Breakish Formation
|
| Stratotypes: |
| Type Section |
Camas Malag, Loch Slapin, Skye. Steel et al., 1975. |
| Reference(s): |
| Nicholson, R. 1978. The Camas Malag Formation: an interbedded rhythmite conglomerate sequence of probable Triassic age, Loch Slapin, Isle of Skye. Scottish Journal of Geology, Vol.14, 301-309. |
| Steel, R J, Nicholson, R and Kalander, L. 1975. Triassic sedimentation and palaeogeography in Central Skye. Scottish Journal of Geology, Vol.11, 1-13. |
| Farris, M A, Oates, M J, and Torrens, H S. 1999. New evidence on the origin and Jurassic age of palaeokarst and limestone breccias, Loch Slapin, Isle of Skye. Scottish Journal of Geology, Vol. 35, Pt. 2, 25-29. |
| Nicholson, R. 1983. Age of the Camas Malag Formation, Skye; reply. Scottish Journal of Geology, Vol.19, 127-128. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S071
|
