Define the three basic types of rocks exist on the planet Earth? What are their types and examples? What is the mechanism involved in their formation? How to identify/differentiate between them?

Answer to following questions:

Define the three basic types of rocks exist on the planet Earth? What are their types and examples? What is the mechanism involved in their formation? How to identify/differentiate between them?
How geological structures are formed due to fold and fault? What are their types? How to classify them? Which types of geological structures can be found in the Saudi Arabia and where?
Calculate the stress at points A and B for a given structure of rocks composed of different types of sedimentary rock layers? [
6200 mm

3900 mm

3700 mm

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