What igneous feature (referring to the dark igneous layer) does the image show? 

Rocks don't melt uniformly because as minerals with lower melting points turn into liquid magma, those with higher melting points remain as solid crystals. This is known as

Which statement is INCORRECT about Peridotite?

This igneous texture indicates the magma body underwent a multi-stage cooling history; cooling slowly while at deeper depths and later rising to a shallower depth or to the surface where it cooled more quickly. This results in some igneous rocks with larger crystals within a finer-grained matrix/groundmass surrounding the larger crystals. 

Magma composition (amount of silica) and temperature controls which of the following?

As magma cools minerals crystallize out causing a change in the remaining magma composition. What is this process called?

Which is INCORRECT about intrusive igneous rocks?

Igneous rocks are classified based on which? (choose all that apply)

The concept that describes the crystallization order of silicate minerals in melt related to temperature.  

Which of the following is INCORRECT about batholiths?