During the millennium, the Earth will become like it was before it was divided into continents. Interestingly enough, the cross reference points to the days of Peleg for the word "divided".
And the land of Jerusalem and the land of Zion shall be turned back into their own place, and the earth shall be like as it was in the days before it was ddivided. (Doctrine and Covenants 133:24 Cross reference D) It appears to be a consistent opinion in the Church throughout the years, and in our curriculum, that the division was a breaking asunder of the continents. Here is from the Old Testament study manual.
(4-22) Genesis 10:25. Was the Earth Divided in the Days of Peleg? “The dividing of the earth was not an act of division by the inhabitants of the earth by tribes and peoples, but a breaking asunder of the continents, thus dividing the land surface and creating the Eastern Hemisphere and Western Hemisphere. By looking at a wall map of the world, you will discover how the land surface along the northern and southern coast of the American Hemisphere and Europe and Africa has the appearance of having been together at one time. Of course, there have been many changes on the earth’s surface since the beginning. We are informed by revelation that the time will come when this condition will be changed and that the land surface of the earth will come back again as it was in the beginning and all be in one place. This is definitely stated in the Doctrine and Covenants. [D&C 133:18–20 is then cited.]” (Smith, Answers to Gospel Questions, 5:73–74.) (http://institute.lds.org/content/languages/english/Institute%20of%20Religion%20Materials/Student%20Manuals/Religion%20301,%20Old%20Testament%20Student%20Manual%20Genesis-2%20Samuel~eng.pdf) I'm just saying, those who want to believe in a physical separation of the continents during the days of Peleg seem to be in good company. Regards, Vanhin