The high iron (Fe) and magnesium (Mg) volcanic rock that predominantly forms the ocean floor is known as **basalt**.

### Explanation:
Basalt is a dark-colored, fine-grained volcanic rock that is rich in iron and magnesium. It is the most common extrusive igneous rock found on Earth and primarily forms when magma cools quickly at or near the Earth's surface. The oceanic crust is largely composed of basalt, which is why it is often referred to in the context of ocean floor geology. Other rock types mentioned, such as shale and limestone, do not have the same volcanic origins or mineral compositions as basalt.

Question

The high iron (Fe) and magnesium (Mg) volcanic rock that predominantly forms the ocean floor is known as **basalt**.

### Explanation:
Basalt is a dark-colored, fine-grained volcanic rock that is rich in iron and magnesium. It is the most common extrusive igneous rock found on Earth and primarily forms when magma cools quickly at or near the Earth's surface. The oceanic crust is largely composed of basalt, which is why it is often referred to in the context of ocean floor geology. Other rock types mentioned, such as shale and limestone, do not have the same volcanic origins or mineral compositions as basalt.

Knowee AI · Accepted Answer

The high iron (Fe) and magnesium (Mg) volcanic rock that predominantly forms the ocean floor is known as **basalt**.

### Explanation:
Basalt is a dark-colored, fine-grained volcanic rock that is rich in iron and magnesium. It is the most common extrusive igneous rock found on Earth and primarily forms when magma cools quickly at or near the Earth's surface. The oceanic crust is largely composed of basalt, which is why it is often referred to in the context of ocean floor geology. Other rock types mentioned, such as shale and limestone, do not have the same volcanic origins or mineral compositions as basalt.

A high Fe, Mg volcanic rock that makes up the ocean floor isGroup of answer choicesbasaltshalelimestoneNo answer text provided.

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