Metamorphic series
Appearance
(Redirected from Barrovian metamorphism)
Metamorphic series include the Barrovian and Buchan series of metamorphic rocks. George Barrow was a geologist in Scotland who discovered the Barrovian series.[1] These are also called metamorphic facies series. A metamorphic facies series is a sequence of metamorphic facies which plot in a temperature-pressure diagram along a line, and this line represents a certain geothermal gradient. They are not the same as metamorphic zones, as these are defined as a region on a geological map where the pressure-temperature conditions for an index mineral (a mineral that indicates the approximate metamorphic grade of a rock), were appropriate for these minerals to form.[2][3]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/3/37/Al2SiO5_phase_diagram.svg/220px-Al2SiO5_phase_diagram.svg.png)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/4/48/Metamorphic_Facies_Series-Barrowian_Buchan.png/220px-Metamorphic_Facies_Series-Barrowian_Buchan.png)
- Buchan metamorphism has the facies series greenschist-amphibolite-granulite
- Barrovian metamorphism has the same facies series but has approximately 1 kbar more pressure so these rocks form kyanite[4]
References
[edit]- ^ "Regional metamorphism". Tulane University. Retrieved 23 August 2019.
- ^ Philpotts,A. and Klein,C. Earth Materials, 2013, Cambridge University Press: New York, pp. 398–399.
- ^ Marshak, S.2015.Earth: Portrait of a Planet, pp. 245–249.
- ^ Tulane University