Oceanic Ridges Are Elevated Compared to the Surrounding Ocean Floor

question 25

Multiple Choice

Oceanic ridges are elevated compared to the surrounding ocean floor because _________.

• A) of the shield volcanoes that develop due to seafloor spreading
• B) the mantle is pushing up the lithosphere along the ridge
• C) newly formed lithosphere is hotter and therefore less dense than the surrounding rocks
• D) the older, colder lithosphere is less dense and tends to rise

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