The rock in Black Canyon, shown below, has bands of light and dark. These bands have different mineral compositions. Which phrase most likely describes the environment in which the rock formed? a) Many rivers meeting in one place.
b) Larger rivers getting smashed into pieces.
c) Very high heat and extreme pressure.
d) Various cooling rates after a volcanic eruption.

A many river meeting in one place

the correct answers are:

a - pacific plate;

it is the biggest oceanic tectonic plate. surrounded on all sides by continental tectonic plates, it is submerging and gradually becoming smaller and smaller.

b - north american plate;

huge continental plate, occupying big portion of the northern hemisphere.

c -eurasian plate;

alongside the north american plate, it is one of the two dominant continental plates in the northern hemisphere.

d - indian plate;

a small continental plate, that has been part of gondwanaland initially, but after the break up of it, moved towards northeast and pushed into the eurasian plate that was once part of laurasia.

amazon river is the right answer i took the test