Tertiary
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The Atlantic Ridge has mountains and deep valleys in the hemispheres, north and south.
The East Pacific Rise has no large mountains or valleys because the Pacific Rises oceanic crust is moving away from the east.
Answer: The period known as classical antiquity began with the emergence of the city-states of ancient Greece. Later, the Roman Empire came to dominate the entire Mediterranean basin. The fall of the Roman Empire in AD 476 traditionally marks the start of the Middle Ages.
Explanation:
A. it moves freshwater more than 100 miles into the ocean
