a) Using well labelled diagrams, describe how the following are formed:(i) An anticlinal fault(ii) An overthrust foldb) Explain any three ways in which features resulting from vulcanicity are a problem to people
Answer Text: i) - Crustal rock layers are subjected to compressional forces- This leads to formation of a massive article /up fold- Further compression to the same crustal rocks causes stress/tension at the crest of the anticline- Eventually a crack/fault and around the crust of the anticline called an anticline faultii) - Crustal rock layers are subjected to compressional forces- Intense folding results into formation of an over fold- With increased pressure the over fold is compressed further to form a recumbent fold- When pressure if very great, a fracture occurs along the axis producing a thrust planeto form an overthrust foldb) - Volcanic mountains experience low rainfall on their leeward slopes making themunsuitable for agriculture/settlement/forestry- Volcanic mountains have steep slopes which hinder transport and communication- Some volcanic features like moffetes, solfataras steam jets produce poisonous gases whichpollutes the environment/are harmful to people- Some volcanic rock weather to form infertile solid unsuitable for agriculture/forestry
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