21. Coal is mostly made up of ————.materials  

10. Which of the mineral below is a KEY MINERAL in low grade metamorphism?  

34. Based on texture which of the following has visible (or coarse crystals)?  

29. Which of the following does NOT explain whether or not volcanoes erupt violently?  

46. Impurities (such as Pyrite or Clay mineral) in the coal create ______________  

41.Dissolution, Hydrolysis and ________________are chemical weatherings  

50. Cross-beds form by the movement of sediment dunes and ripples by wind or water.

32. Most likely Sulfide ores form as ————————–  

2. Calderas also form when pyroclast deposits at the summit of the volcano puts weight on to emptied magmatic chamber below causing summit to collapse and caldera to form.

38. Which of the igneous rock below formed from sticky, plastic and squashed hot ash and lapilli mixture?