1. How Rocks Were Formed: Metamorphic
Metamorphic rocks are formed from existing rock by the action of heat, pressure, and chemicals.

2. Regional Metamorphism
Occurs when large areas of rock are under intense heat and pressure, which occurs during mountain-building movements
Heat from the friction of moving rock layers is added to the heat already in deeply buried rocks, water and other liquids and gases joins with heat and pressure
Regional metamorphism takes place over very large areas
Pressure squeezes the grains together
Heat and chemicals rearrange the particles, forming or reforming minerals

3. Metamorphism of Shale The rock becomes more dense and more crystalline
The elements recombine to form new minerals like mica and hornblende
The pressure squeezes the flakes of mica into parallel layers, along which the rock splits easily: foliation
Slate, phyllite, and schist form from regional metamorphism of shale, depending upon the intesity of the metamorphism
Phyllite
Slate

4. Schist can form from shales, sandstones, and basalt
Gneiss is formed from shale, granite, conglomerate, and many others. It has the coarsest foliation of all the metamorphic rocks.
Schist
Gneiss

5. Contact Metamorphism
This process occurs when hot magma forces its way into overlying rock
The heat of the magma bakes the rock that are in contact with it
Hot liquids and gases also enter the intruded rock and react with its minerals
Much less rock is affected than in regional metamorphism
Changes in the rock are less drastic, with no foliation
Hornfels
Geology.com Link to Pictures

6. Rock Cycle

7. Rock Cycle (with shortcuts)