The Rocky Mountains are described as younger because the Rocky's are really two mountain chains. The older mountain chain started billions of years ago, and the younger mountain chain pushed the older mountain chain up more, only 60 millions years ago.
Answer:
The first trilobite species went extinct and its ecological niche was occupied by another species, which may have evolved from the first cap
Explanation:
Considering the knowledge of geography and the situation you described in the text, the correct answer is that ", the Trilobite species went extinct and its ecological niche was occupied by another species, which may have evolved from the first cap.
To get more rocky and it will get bigger and taller
Economic growth and development
A planet in motion remains in a stable orbit around the sun mainly because of two things: the nature of the gravitational force and because virtually no other forces act on the planet. The momentum of a planet changes during its orbit but not, in general, its inertia -- which relates solely to its mass.
