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A 20-pound sedimentary rock formed on a mountain cliff near the sea. The rock was made up of grains of sand, pebbles, and exoskeletons of tiny insects. It was held together by calcite. One day, the rock fell into the ocean and over time was buried deep inside Earth. Once inside, the rock was no longer sedimentary but instead turned into a metamorphic rock. After many years, it returned to Earth's surface. Why did the rock not become an igneous rock?

A. It lay in a region that was close to the salt-filled ocean.
B. It contained organic material from a number of insects.
C. It did not experience high enough pressure for compaction.
D. It had not experienced high enough temperatures to melt.
E. It had a composition that was not homogeneous.

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Final answer:

The rock did not turn into an igneous rock due to insufficient temperatures for melting, undergoing metamorphism instead.


Explanation:

Why did the rock not become an igneous rock?

The rock did not become an igneous rock because it did not experience high enough temperatures to melt. Igneous rocks form from molten rock cooling and solidifying, which this rock did not undergo. Instead, it went through metamorphism due to heat and pressure, transforming it into a metamorphic rock.


Learn more about Sedimentary Rocks here:

https://brainly.com/question/10709497


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