Why aren't rock's from Canada found south of the Missouri river?

What determines water's vertical position in the ocean? How deep is amazonite? How big is dover castle? The most important and the holy river for the ancient indo-aryan tribes was the? Which city lies on the opposite side of the Mississippi River from Minneapolis St. Paul or Chicago? Ocean depth is a continuous or discrete variable? Where is the hilus located? What is nose bridge? Where does the River Gipping end? What is a scientist called if he studies waterfalls? Why are so many medicinal plants are discovered in the rainforest of the world rather than in other biomes? Did Lewis and Clark find an easier route to the Pacific Ocean? What are the cities in the great basin desert? Is it possible to swim the Mississippi river near St. Louis? What is the best castle to attack with ladder to climb over? The main route that through the rocky mountains to Oregon was called the what pass? What are all countries that have a boreal climate? Where is debprah Sampsons statue? When a stream has reached a balance between erosion and deposition it is called what? Where is the River Rhine?