After 1869, J. Powell set sail to explore the colorado river and the grande canyons and once has a confluences with the colorado river and the market the place with the lines in yellow has to represent the unconformity of the zones and are a buried erosional and a non-depositional surface that separates the two rocks, masses into the two surfaces and thus indicate the sediments deposited are not continuous.
I do not believe that a strong nation should be able to boss around weaker nations. This is just wrong in that a nation should be free to decide what it wants to do. A strong nation can assist them in developing. How ever they should not rule them. At that point that weaker nation will be stripped by of their sovereignty. This is not that times of Empires.