Deformed Crust

1. Normal fault
2. Reverse fault
3. Thrust
4. Monocline
5. Graben
6. Horst
7. Lateral fault
8. Anticline
9. Syncline
10. Assymmetrical fold
11. Isoclinal fold
12. Recumbent fold

When the rocks of the crust are subjected to the stresses of Earth movements, they deform. This Deformation ca be in the form of cracks, called faults - compressional, giving lateral faults.
Folds may have been formed by quite gentle movements, in which case each fold will be several kilometres in extent, or by very intense pressure giving a highly deformed terrain

Plate tectonics

Plate tectonics in geology a theory that the Earth's crust is made up of a number of thin segments or plates which are moving relative to one another. Movement of the plates gives rise to the observed phenomenon of continental drift. Where the plates meet Earthquakes and volcanoes may occur.

Volcano

Volcano an opening in the Earth's crust through which molten rock or magma escape often with explosive violence. The emerging stream is called Lava. Repeated volcanic eruptions at a site give rise to a typical conical structure as layers of ash and solidified lava buildup. Most volcanoes are located at the boundaries of the plates that make up the Earth's crust



Volcano Picture
1. Magma Reservoir
2. Country Rock
3. Conduit
4. Base
5. Sill
6. Branch Pipe
7. Layers of ash emitted by the volcano
8. Flank
9. Layers of Lava emitted by the volcano
10. Throad
11. Parasitie cone
12. Lava flow
13. Vent
14. Crater
15. Ash Cloud