Petrologi 2-genesis magma
Metamorphismpptpntn.ppt2
Plate Margins We must now look at the 3 main types of plate margin: Constructive. Destructive. Conservative. Each type of plate margin has different.
Amongst the common rock forming minerals Felspathoid minerals containing less % of silica are also present which are usually allied with Feldspars Nepheline.
Metamorphism – I.G.Kenyon Definition Meta means ‘change’, Morph means ‘form’ A change in form of pre-existing rocks of all types. Sedimentary, igneous.
Nepheline (Silicate of sodium and aluminium=>Albite
