28. How would you classify granite?
29. What is the mineralogical composition of syenite and diorite?
30. How do we distinguish the two groups into which igneous rocks are subdivided? What is meant by the terms amygdaloidal and porphyritic?
31. Name some rocks that belong to the acidic group. What is quartz-porphyry?
32. Give examples of augitic igneous rocks. Name a hornblendic igneous rock.
33. What are fragmental igneous rocks? What is the difference between trappean breccia and trappean conglomerate?
34. What is meant by the terms stratum, strata, and stratified? What is the difference between lamination and bedding? What is a section?
35. What is false bedding?
36. Briefly describe the general appearance of mud-cracks and rain-prints, and say how these have been formed.
37. What is meant by a succession of strata?