Sill swarm explained

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]

Notes and References

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