Louis and Clark found the discoveries of the west staggering. They saw that the land was stable for future agriculture, and contained many mineral deposits. Seeing that the land was economically stable, they found the purchase to be a great deal. This lead to the Louisiana Purchase. Honestly (this is just my opinion), I don't think that geography had an impact on the Monroe doctrine , but the Monroe doctrine had an impact on those who settled since it asserted that the Americas were not to be further colonized by European countries but that the United States would neither interfere with existing European colonies nor meddle in the internal concerns of European countries.
the flat, low-lying plain that sometimes forms at the mouth of a river from deposits of sediments. increase in the price of goods and services. (1803) land bought by the United States from France, extending from the Mississippi River to the Rocky Mountains, and Canada to the Gulf of Mexico.
I believe the plates are called the south American plates just saying I might be correct or I might be wrong so don't take my word for it I am not the expert
