Sill swarm

A sill swarm or sill complex in geology is a major group of sills intruded within continental crust. They are located under volcanic edifices, including flood basalt provinces and large lava plateaus. The volume of sill swarms can be similar to dike swarms.^[1]

Examples

• Chatsworth sill swarm, Victoria, Australia^[2]
• Loch Scridain Basalt-Rhyolite Sill Swarm, Mull, Scotland^[3]
• Morel sills, near Coronation Gulf, Nunavut, Canada^[4]
• Rio Perdido sill swarm, Mato Grosso do Sul, Brazil^[5]
• Sariwon Sill Swarm, China^[6]
• Sill swarm in the Nahuel Niyeu Formation of Patagonia, Argentina^[7]

References

1. Best, Myron G., Igneous and Metamorphic Petrology, Wiley - Blackwell, 2002, 2nd ed., p. 216 ISBN 978-1-4051-0588-0
2. "Glenthompson Sandstone". Australian Stratigraphic Units Database. Geoscience Australia. 26 February 2016. Retrieved 18 April 2017.
3. Gillespie, M R.; et al. (2012). "BGS classification of lithodemic units: a classification of onshore Phanerozoic intrusions in the UK" (PDF). Report RR/12/01. British Geological Survey. p. 38. Retrieved 22 December 2015.
4. Hildebrand, R. S.; et al. (2010). "The Calderian orogeny in Wopmay orogen (1.9 Ga), northwestern Canadian Shield" (PDF). GSA Bulletin. 122 (5–6): 794–814. Bibcode:2010GSAB..122..794H. doi:10.1130/B26521.1.
5. Lacerda Filho, Joffre Valmório de (2015). "Bloco Rio Apa : origem e evolução tectônica". Tese (Doutorado em Geologia)—Universidade de Brasília. Retrieved 18 April 2017.
6. Mingguo Zhai, ed. (2015). Precambrian Geology of China. Berlin: Springer. p. 182. ISBN 978-3-662-47884-4.
7. Greco, G. A.; et al. (2015). "Geology, structure and age of the Nahuel Niyeu Formation in the Aguada Cecilio area, North Patagonian Massif, Argentina". Journal of South American Earth Sciences. 62: 12–32. Bibcode:2015JSAES..62...12G. doi:10.1016/j.jsames.2015.04.005. hdl:11336/39266.