Ocean tide was numerically calculated for various ocean continent configurations. The calculated tidal torque response for semidiurnal ocean tide is found to be bigger, when the continents are lined on the equator than when the continents are lined along the meridian. Since the ocean continent configuration significantly affects the tidal torque, variation of the Earth's spin rotation rate in the past should be associated with the continental drift. The present calculation suggests that the long and short term variation of l.o.d. (length of day) up to 600 Ma b.p. estimated From palaeontological studies is explained by temporal variation of the ocean continent configuration. Moreover it is highly probable from our result that the continents before Cambrian age were lined more or less on the meridian or of other configurations that gives smaller tidal torque than the Cambrian configuration.
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机译：海潮以各种海洋大陆配置计算数值计算。当大洲排列在赤道上时，发现半夜间潮汐的计算潮汐扭矩响应比沿着经络衬里衬里。由于海洋大陆配置显着影响潮汐扭矩，因此过去的地球旋转速度的变化应与大陆漂移相关。本计算表明L.O.D的长期和短期变化。 （一天的长度）高达600 mA B.P.通过古生物学研究估计，通过海洋大陆配置的时间变化来解释。此外，从我们的结果是高度可能的，即寒武纪时代的大陆在子午线或其他配置中衬里或多或少地提供比寒武罩配置更小的潮汐扭矩的配置。
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