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	Fine grained; The texture is complex,strained porphyroclasts areset in a finer grained matrix,formed by the crushing of minerals of different physical properties.It forms at depth in zones of shearing almost invariable.Occuring in regional metamorphic gneisses.It is found in California (USA) and in Insurbic Line (Central Alps).
Mylonite

	Medium to coarse grained; Commonly formed of alternating dark and light bands. it is widely distributed in regional metamorphic terrain, Canada, Australia and Brazil, are but a few. Gneiss mainly consistes of quartz and feldspare.
banded gneiss

	Medium to course grained; Formed at high temperatures, Migmatites are complex rocks. the dark schist like component being paleosome, and the light granitic component being neosome, the components grade into each other. more commonly found in Canada, Finland, and the scottish highlands.
Migmatite

	Medium to course grained; Formed by limestone melamorphism, marble is , strictly a crystalline carbonate rock. It is easily scratched with a knife. much used on buildings, the Taj Mahal, in India, is constucted of white calcite marble.
Marble

	Medium or course grained; Mica is a sparkling greyish colour , white grains of quartz may sometimes be visible. The parallel mineral arrangement is what gives it a foliation known as schistosity. the differant types of schist are named after the prominant minerals within then.
Mica schist

	Fine to medium grained; It is purle or dark blue in colour,it is uncommon but found in orogenic mountain belts, the himailayas, or the alps.It shows chaotic relationships in the field forming broken blocks with ophiolite fragments in a sheared matrix of shale or serpentinite.
Glaucophane

	Fine grained; Mostly grey or black in colour.Some slate contains iron pyrites.It is common in regional metamorphic terrains,it may be interlayed with volcanic rocks.It is found in Skiddaw (England), The Alps and Aar Massif.
Slate

	Medium to course grained; It is pale green to greenish black,usually with red or bright green streaks or blotches.It occurs in stocks,dykes and lenses often grading into periodite.It can be found in many places for example Cornwall (England),Montana (USA),New Zealand and the Phillipines.
Serpentinite

	Medium to course grained; It is red and green in colour.The essential minerals are garnet and the aluminiumcontaining clinopyroxene omphacite.It occurs in common eclogites as small bodies in migmatites or gneisses.It is found in The Highlands (Scotland),South Africa and Piedmont (Italy).
Eclogite

	Medium grained; The colours are white,grey or reddish.Minerals found are mostly quartz or it may contain mica.It is derived from mature sorted sediments and conglomerates.It is found in the Scottish Highlands,County Galway (Ireland) and Venezula.
Quartzite

	Fine grained; Its colour is light green,grey or dark grey.The fine grains are too small to be identified by the naked eye.It occurs in regional metamorphic terrains.It is very common in New South Wales (Australia),New England (USA) and Loch Leven (Scotland).
Phyllite

	Medium grained; The metamorphism of basic igneous rocks are usuelly what forms amphibolite, namely lava, basaltic tuffs or intusive dolerite. they are formed at a temperature of around 600-750C(1100-1380F) this is a medium temperature.green or black often specked or striped with white or grey.
Amphibolite

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This is when igneous, sedimentary, or even other metamorphic rock developes new minerals, these changes can take place when they are cooked by the earths interior heat, or when rock compresses through the pressure of other rocks, an example of this is proccess, is the rocks deep inside a mountain.
But these changes can only take place if the rock is solid. if the heat and pressure is that great that it completley melts the rock it will become igneous again.
This process of constant change is referred to as the rock cycle.
There are two types of metamorphic rocks, these are called thermal and regional.
Thermal metamorphic;
This type of rock is formed when heat and fluids from cooling igneous rocks metamorphose the rocks surrounding them.
Regional metamorphic;
This type of rock are formed by intense heat and pressure, like under mountain chains, where these chains can stretch over very large areas.