For example, the crust beneath Iceland and the mid-Atlantic ridge is more dense than in the Indian Ocean, which means more mass, which means stronger gravity in the N. Atlantic.

例如，冰岛下的地壳和大西洋中洋脊就比印度洋密度更高，这代表它们具有更多质量，也就有更大重力。

1000 years from now, since the ocean floor is spreading at a fast rate, 5 centimeters a year in the mid-Atlantic ridge, in a millennia, it will have spread a whopping 46 meters or 154 feet.

距今 1000 年之后，由于洋底正以每年 5 公分的速度在大西洋中部海脊快速扩张，到一千年后，它将扩展到惊人的 46 公尺或 154 英尺。