Rum layered intrusion

The Rum layered intrusion is located in Scotland, on the island of Rùm (Inner Hebrides). It is a mass of intrusive rock, of mafic-ultramafic composition, the remains of the eroded, solidified magma chamber of an extinct volcano that was active during the Palaeogene Period.[1] It is associated with the nearby Skye intrusion and Skye, Mull and Egg lavas.[2] It was emplaced 60 million years ago above the Iceland hotspot.[3][4]

Thin section of gabbro from Rum

Layers of mafic and ultramafic intrusive rocks forming the mountain of Hallival

References

1. Emeleus, C.H.; Troll, V.R. (2008). A geological excursion guide to Rum : the Palaeocene igneous rocks of the Isle of Rum, Inner Hebrides. Edinburgh [Scotland]: Edinburgh Geological Society. ISBN 978-1-905267-22-4. OCLC 437092879.
2. Bell, B. R.; Williamson, I. T. (2002). "Tertiary igneous activity". In Trewin, N. H. (ed.). The Geology of Scotland (4th ed.). Geological Society of London. ISBN 9781862393905.
3. Hamilton, M. A.; Pearson, D. G.; Thompson, R. N.; Kelley, S. P.; Emeleus, C. H. (16 July 1998). "Rapid eruption of Skye lavas inferred from precise U–Pb and Ar–Ar dating of the Rum and Cuillinplutonic complexes". Nature. 394 (6690): 260–263. doi:10.1038/28361.
4. Kent, R. W. (1 November 1995). "Magnesian basalts from the Hebrides, Scotland: chemical composition and relationship to the Iceland plume". Journal of the Geological Society. 152 (6): 979–983. doi:10.1144/GSL.JGS.1995.152.01.17.