The igneous rock in the figure below has what type of texture?  

Explain why it is not necessary to chemically analyze a common mineral in order to make an identification.

What is the depth of this newly forming Hawaiian island, Loihi?  

Hawaiian eruptions are extremely violent and produce large pyroclastic flows.

Molten rock that reaches Earth’s surface is known as _______.

Which of the following is the name for a fine-grained, felsic igneous rock?

The person in the figure below was encased by a pyroclastic flow.  

What is the difference between a sill and a dike?

The island depicted in the diagram acts as                     .                    

The composition of most magma is 40%-75% ________ by weight.