Exam 5: Igneous Environments

The igneous feature shown in this figure is a:

Which of the following igneous rocks has a texture consistent with a magma that cooled and solidified slowly at first,followed by more rapid cooling?

What does this welded texture indicate about the formation of this rock?

Which number on this figure indicates heating by conduction?

Which of the following rock types requires dissolved gas in the magma?

The site on the accompanying figure that would most likely form a rock that has a nonwelded texture with many fine particles is:

Hot spots in continental settings typically produce:

The igneous feature shown in this photograph is:

Which of the following changes in conditions represents decompression melting?

The site on the accompanying figure that would most likely form a rock with large crystals is:

Which of the following is characteristic of continental rifts?

Which number on this figure indicates transfer of thermal energy by a convection cell?

When melting forms magma:

Which of the following rock photographs depicts a felsic igneous rock?

What does this texture indicate about the formation of this rock?

The dark igneous features shown in this photograph are:

What does the texture of this rock indicate about its cooling history? The magma cooled:

Which of the sites shown in this figure have decompression melting in an oceanic setting?

Which of the letters shown on this figure would most likely be over magma related to decompression melting?

Which of the following acts to keep a rock solid (instead of melting)?