| 41. | Mexico has a long history of destructive earthquakes and volcanic eruptions.
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| 42. | Severe storms, dust clouds and volcanic eruptions can generate lightning.
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| 43. | High levels of volcanic ash ( from the eruption of Mt.
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| 44. | The two main types of rock are volcanic tuff and granite.
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| 45. | Near volcanic areas, the air can be as hot as.
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| 46. | The Central Volcanic Zone is a major upper Cenozoic volcanic province.
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| 47. | The Central Volcanic Zone is a major upper Cenozoic volcanic province.
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| 48. | Some minor volcanic activity may occur in the next few years.
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| 49. | The conglomerate layers occur as interbedded units within the volcanic pile.
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| 50. | In the prior 24 hours, 13 volcanic earthquakes were recorded.
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