| 41. | In the Middle Llandovery, the Pacific plate boundary moved a few hundred km to the east.
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| 42. | The plate boundary continues inland along the Marlborough Fault System, linking through to the Alpine Fault.
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| 43. | More than a billion years ago, the North American continent began to split apart along plate boundaries.
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| 44. | The quantity and quality of recoverable resources improves with drilling depth and proximity to tectonic plate boundaries.
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| 45. | Not all plate boundaries are easily defined.
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| 46. | Transform faults are plate boundaries, meaning that on either side of the fault is a different plate.
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| 47. | "We don't have a plate boundary off New York, and so don't expect any comparable undersea quakes,"
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| 48. | Tokai earthquakes happen every 100 to 150 years along the plate boundary that runs through Suruga Bay.
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| 49. | The ages of initiation of volcanism and subduction track the developing plate boundary as subduction propagated northwards.
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| 50. | The length of the plate boundary that ruptured during the earthquake is estimated to be 390 km.
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