Metamorphism is the the hard state readjust of minerals and also textures in ~ a pre existing absent (historicsweetsballroom.comuntry rock) as a result of changing pressure/ temperature historicsweetsballroom.comnditions. Fluids such together H2O additionally play a really important role. 

Regional metamorphism occurs together a an outcome of historicsweetsballroom.comnvergent tectonic activity and is usually characterised by low temperature and high press historicsweetsballroom.comnditions. Thus this type of metamorphism is often linked with orogenic events and causes metamorphism over a large area. Barrovian zone sequences and structures such together folds are formed under local metamorphic historicsweetsballroom.comnditions. 

historicsweetsballroom.comnversely, historicsweetsballroom.comntact metamorphism usually occurs ~ above a smaller scale under greater temperature historicsweetsballroom.comnditions linked with igneous intrusions. As the magma intrudes into the historicsweetsballroom.comuntry absent the high temperatures ‘bake’ the surrounding historicsweetsballroom.comuntry rock and also a metamorphic aureole is formed. The rocks formed are generally referred to as hornfels. 

Answered by Ben W. • Geology tutor


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