Exam 4: Igneous Rocks and Plutons

Bowen's Reaction Series explains why Si-rich minerals are the last to crystallize from a magma.

Pegmatites are rocks of felsic composition that are similar to granite.

How does lava differ from magma?

How do the holes form in vesicular igneous rocks,such as scoria and pumice?

What is a mantle plume,and what causes one to erupt?

Aphanitic,phaneritic,and porphyritic are textural terms that ____.

According to Bowen's reaction series,crystal settling should result in the magma being separated in lower layers rich in the early-formed ____________________ minerals,and upper layers enriched in later-formed ____________________ minerals.

Why does lava retain heat so well?

Although all compositions are represented,most plutons are ____.

What phenomena does Bowen's Reaction Series help explain?

Bowen's Reaction Series explains the order of mineral formation with decreasing temperature.

Basalt and gabbro are compositional equivalents,which means that they are made up of the same ____________________ but have different ____________________.

What is a vesicular felsic rock called?

The increase in Earth's temperature with depth is called the ____________________.