Exam 6: Up From the Inferno: Magma and Igneous Rocks

If a body of magma is subjected to fractional crystallization,the first rock that is expected to crystallize from the magma will be ________.

Which of the following is NOT a factor controlling the cooling rate of magma?

If you found tuff deposits at an ________ igneous setting,you could conclude that the source magma had a ________ viscosity.

Large igneous provinces involve more than just the formation of large volumes of igneous rock.Which of the following global events has NOT been attributed to large igneous provinces?

Viscosity does NOT depend on ________.

A majority of the melts in the Earth form through the partial melting of ultramafic mantle rock.These newly formed magmas are ________.

The silicate mineral that is found in the greatest variety of igneous rocks of various compositions is ________.

Pegmatites,which often occur in dikes,are unusual among shallow intrusive rocks in that they ________.

Which of the following is NOT a characteristic of the extrusive igneous rock obsidian?

When magma crystallizes,________ are formed.

Large igneous provinces are formed by ________,which can flow tens to hundreds of kilometers.

A volcano emits ash,which falls from the sky,settles in layers,and is eventually cemented.The resulting rock is termed ________.

Vesicular is a term used to describe a texture in ________ igneous rocks.

As compared to mafic igneous rocks,all felsic igneous rocks ________.

Coarse-grained granite is most similar in mineral composition to fine-grained ________.

Given the solidus and liquidus curves below,which location represents material that is partially melted?

In the figure provided below,what type of igneous intrusion is the vertical rock unit shown by letter A?

In general,if a body of igneous (source)rock is subjected to partial melting,the magma that is produced is expected to be ________.

A sill is a(n)________.