The Three Most Plausible Indian Migration Theorys

         The first plausible theory about how indians migrated to North America is the land bridge theory.  This states that during the ice age there was much less water in the ocean and more in the form of ice on land.  Because of this, according to the book Washington: A State of Contrasts, there was dry land in the Bearing Strait. Also the book states that the Indians could walk across the land. They would have a sort of land bridge .
       The next theory is the ice bridge theory. This states that the Bearing Strait could have just froze. This is also stated as a possibility in Washington: A State of Contrasts. The book then states that if it was frozen, the Bering Strait would still be able to be walked across.
      The last plausible theory is that when the water was lower in the ocean, which according to Washington: A State of Contrasts it was, that a narrow shelf was exposed. This shelf, and this theory are both named the continental shelf.  This theory also includes a much narrower pathway. The continental shelf goes out from the land, then drops to ocean floor according to rockhoundingar.com. Because of this there is much less depth in some areas of the ocean. If during the ice age there was less water in the ocean, two on both sides could be exposed.
       I think the most plausible theory is the ice bridge. This is because I think that there is not a lot of proof that the ocean levels actually dropped enough for one of the other theories. But for proof of this theory think of how easy it would be for water to freeze in the kind of temperatures generated by an ice age. That is why I believe the ice bridge theory is the most plausible indian migration theory.