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31. Back-arc spreading may be initiated within the volcanic arc because the high heat flux from below weakens the lithosphere.

32. They could be likened to the dynamic force of a volcanic eruption.

33. Forest drive with magnificent views of the volcanic ring of hills of which Slieve Gullion forms a part.

34. We pass some strangely shaped mountains that must have been volcanic plugs poking up through vast panoramas.

35. Others held that meteorites were more immediately terrestrial in origin, being akin to volcanic bombs ejected by violent eruption events.

36. One of the ingredients it requires is hydrogen, a gas that is produced in great quantities during volcanic eruptions.

37. Their campsites, graves, and houses had been buried and protected by a volcanic eruption.

38. The massive volcanic eruption could affect the climate of the whole planet.

39. The shape and direction of the valleys have been influenced by the location of the more easily eroded volcanic material.

40. Much of the mountain consists of volcanic ash, long since hardened to jagged rock.

41. There are significant differences in the morphology and degree of volcanic activity associated with these two types of rift.

42. The major differences in rift characteristics relate to their position with respect to plate boundaries and the intensity of volcanic activity associated with them.

43. The island became covered with vegetation, fossils of which are sometimes found in the volcanic ashes.

44. Sumatra is composed of old, thick continental crust comprising volcanic rocks of Permian, Cretaceous and Cenozoic age.

45. Multicolored volcanic ash flows, long since hardened to jagged rock, reach into the sea like fantastic taffy mountains.

46. Thus the volcanic rocks formed are drastically different from their oceanic counterparts.

47. Eventually granite intrusions are emplaced at high levels within the mountain mass and volcanic activity develops.

48. It therefore follows that all sedimentary bodies, other than deep sea oozes and volcanic ash deposits, are likely to be diachronous.

49. Various experiments done in volcanic environments have shown that proteinoid globules are very likely to form in such regions.

50. Natural catastrophes, such as volcanic eruptions, may result in sites being buried very rapidly.

51. Fairly consistent patterns are evident in the location of the volcanic activity with respect to the fringing trench.

52. These changes have been related to volcanic activity in this eruptive neighbourhood.

53. Early on, studies of the equatorial regions revealed great volcanic mountain systems and several apparent large impact craters.

54. This heating and crushing was due to nearby igneous volcanic activity about 400 million years ago.

55. A word here in passing about what actually goes to make up a typical volcanic eruption cloud.

56. When lava flows are erupted at the surface, they are necessarily rapidly chilled, and volcanic glasses are common.

57. The city was buried under several meters of volcanic ash(sentencedict .com), many of the inhabitants being asphyxiated in their houses.

58. Anaxagoras planned to demand some solid data on the volcanic activity which kept shaking Mount Aetna.

59. This period was sufficiently long for the widespread planation of oceanic islands, many of them volcanic.

60. A complicated pattern of basins and ridges hind the volcanic arc.