Lesson on Types of Faults
Types of Faults Normal Faults Type formed by tensional forces in which one block slides downwards in relation to the other. • Rocks are subjected to tensional forces• A normal fault develops • One block slides downwards. Reverse FaultType formed by compressional forces in which one block of land is pushed upwards in relation to the other. • Rocks are subjected to compressional forces. • A reverse fault develops.• One block is pushed over the other. Shear/Tear FaultType formed by shear forces in which adjacent blocks of land slide past one another. If a shear fault occurs between continents it’s called a Transform fault e.g. San Andrean fault of California and great glen fault of Scotland. Thrust FaultsType formed when very strong compressional forces cause almost horizontal faults to develop and one block of land is pushed over the other. Anticlinal fault Type formed when anticlines are compressed further and cracks form on the crest.