Question

elsic (or silicic) magma a. crystallizes at the highest temperatures. b. is more viscous than mafic magma. c. has approximately 40% silica and little magnesium and iron. d. is likely to form dark-colored igneous rocks.

Answer 1

Option (B)

Step-by-step explanation:

Felsic magma refers to those magma that are comprised of more than 65% of silica content and are highly made up lighter elements like oxygen, silicon, sodium, aluminum, potassium, and are light-colored in comparison to the basic magma. Due to its high silica content, these are high viscosity magma and flows at a much slower rate. The felsic magma crystallizes at a relatively low-temperature rocks and the rocks that are formed from this type of magma have a specific gravity of less than 3.

Thus, the correct answer is option (B).