# Anorogenic magmatism

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In [geology](/source/Geology), **anorogenic magmatism** is the formation, [intrusion](/source/Intrusive_rock) or eruption of [magmas](/source/Magma) not directly connected with [orogeny](/source/Orogeny) (mountain building).[1] Anorogenic magmatism occurs, for example, at [mid-ocean ridges](/source/Mid-ocean_ridge), [hotspots](/source/Hotspot_(geology)) and continental [rifts](/source/Rift). This contrasts with orogenic [magmatism](/source/Magmatism) that occurs at [convergent plate boundaries](/source/Convergent_boundary) where [continental collision](/source/Continental_collision), [subduction](/source/Subduction) and orogeny are common.[2]

## References

1. Sheppard, S.M.F. (1986). ["Chapter 10 – Igneous Rocks III – Isotopic Case Studies of Magmatism in Africa, Eurasia and Oceanic Islands"](https://archive.org/details/stableisotopesin0000unse/page/319). *Stable Isoptopes in High Temperature Geological Processes (Reviews in Mineralogy – Volume 16)*. Valley, J.W; Taylor, H.P.; O'Neil, J.R. (eds.). Mineralogical Society of America. p. [319](https://archive.org/details/stableisotopesin0000unse/page/319). ISBN 0-939950-20-0.

1. [Anorogenic magmatism in Dronning Maud Land (Antarctica)](http://www.mv.helsinki.fi/home/jsheinon/amanda/indexeng.html)

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