GEOLOGY

EARTH SCIENCE

SEISMOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Where is new seafloor created?
A
At the trenches
B
At the mid-ocean ridges
C
On the continental shelf
D
None of the above
Explanation: 

Detailed explanation-1: -Mid-ocean ridges occur along divergent plate boundaries, where new ocean floor is created as the Earth’s tectonic plates spread apart. As the plates separate, molten rock rises to the seafloor, producing enormous volcanic eruptions of basalt.

Detailed explanation-2: -The newest, thinnest crust on Earth is located near the center of mid-ocean ridge-the actual site of seafloor spreading. The age, density, and thickness of oceanic crust increases with distance from the mid-ocean ridge.

Detailed explanation-3: -The East Pacific Rise is located in the Pacific Ocean between the Pacific plate and the North American, Cocos, and Nazca plates. This fast-spreading ridge creates 6 to 16 centimeters, or 3-6 inches, of new ocean crust each year.

Detailed explanation-4: -In the ocean, tectonic processes continuously create and destroy oceanic crust. New crust is created at mid-ocean ridges and moves away from them over millions of years. Old crust is destroyed when it reaches seafloor trenches.

Detailed explanation-5: -The mid ocean ridge systems are the largest geological features on the planet. The Mid-Atlantic Ridge (MAR) is a mostly underwater mountain range in the Atlantic Ocean that runs from 87°N-about 333km south of the North Pole-to subantarctic Bourvet island at 54°S.

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