Which igneous rock or magma has the least amount of light-colored silicates?

The main reason for the elevated position of the oceanic ridge is because ________.

What are volatiles?

Which of the following is true about a mineral’s streak?

________ is the aphanitic or fine-grained equivalent of gabbro.

Which of the following is true about a mineral’s streak?

Which type of plate boundary occurs where two plates move apart, resulting in upwelling and partial melting of hot material from the mantle?

________ are the largest intrusive igneous bodies.

All silicate minerals contain ________ and ________.

By the early Cenozoic era, Australia had separated from ________.