PETROLOGY BONUS ACTIVITY

Igneous rocks form from the cooling and solidification of:

• Sediments

• Magma/Lava

• Pre-existing rocks

• Minerals

A holocrystalline igneous rock is composed entirely of:

• Glass

• Crystals

• Fragments

• Gases

Obsidian is an example of a(n) ________ igneous rock.

• Holocrystalline

• Holohyaline

• Merocrystalline

• Porphyritic

Granite is a(n) ________ igneous rock.

• Extrusive

• Volcanic

• Intrinsive

• Plutonic

Bowen's Reaction Series describes:

• Sedimentary rock formation

• Metamorphic rock formation

• Mineral crystallization in cooling magma

• Igneous rock weathering

The discontinuous branch of Bowen's Reaction Series primarily involves:

• Feldspars

• Ferromagnesian minerals

• Quartz

• Micas

The continuous branch of Bowen's Reaction Series primarily involves:

• Olivine

• Pyroxene

• Plagioclase feldspar

• Amphibole

A dike is a tabular intrusion that is:

• Parallel to bedding

• Perpendicular to bedding

• Conformable to bedding

• Unrelated to bedding

A sill is a tabular intrusion that is:

• Perpendicular to bedding

• Parallel to bedding

• Conformable to bedding

• Unrelated to bedding

A batholith is:

• A small, shallow intrusion

• A large, deep intrusion

• A volcanic cone

• A type of lava flow