| 41. | This caused Alvarez to abandon the supernova possibility and focus singularly on an impact event being the cause.
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| 42. | The spherules found in the ice may originate from terrestrial debris ejected into the atmosphere by an impact event.
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| 43. | The crater is believed to be caused by an impact event due to basement rocks found outside the crater.
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| 44. | Mozart crater is interpreted to have excavated dark material from depth during the impact event, creating dark streamers.
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| 45. | The base of the waterfall abuts a dike of brecciated quartz which is believed to predate the impact event.
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| 46. | Impact events are typically recorded with high-speed video / film, or Particle Image Velocimetry ( PIV ).
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| 47. | However, there are other negative gravity anomalies nearby which are not believed to be related to the impact event.
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| 48. | The anomaly will be mapped in a much greater detail to determine if it is related to the impact event.
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| 49. | This estimate is based on evidence of five to ten large impact events in the last 10, 000 years.
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| 50. | In rare cases, the asteroid travels on a trajectory that intersects the planet, resulting in an impact event.
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