Q2. Rocks can be classified into three groups which are igneous, sedimentary and metamorphic rocks. a) b) d) What criteria are used to classify the igneous rocks in terms of its mass and material characteristics? (6 marks) Discuss the characteristics of the depositional environment that influence the properties of sedimentary rocks? (5 marks) How is foliation produced in a metamorphic rock? (2 marks) Discuss some of the engineering problems associated with metamorphic rocks? (6 marks)