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