Review sheet for Quiz #2 (to be given 6
February)
The actual quiz will consist of 20 - 25 questions to be answered in
30 minutes at the beginning of class. The questions will be short
answer, fill in the blank, label the diagram, or draw a diagram.
The quiz will be worth 50 points. We will have an informal
review,
if wanted, on Thursday evening starting at 5:30 PM in room 3120.
Key Terms
| Andesite |
Anhedral |
Aphanitic |
| Basalt |
Batholith |
Bowen's
Reaction Series |
| Concordant |
Continuous
Reaction Series |
Country Rock |
| Cross-cutting
Relationships |
Dike |
Diorite |
| Discontinuous
Reaction
Series |
Discordant |
Equigranular |
| Euhedral |
Extrusive |
Felsic |
| Gabbro |
Granite |
Groundmass |
| Holocrystalline |
Holohyaline |
Hypocrystalline |
| Intermediate |
Intrusive |
Komatiite |
| Laccolith |
Law of
Superposition |
Lopolith |
| Mafic |
Matrix |
Pegmatite |
| Peridotite |
Phaneritic |
Porphyritic |
| Rhyolite |
Silicic |
Sill |
| Stock |
Subhedral |
Ultramafic |
| Viscosity |
Xenolith |
|
Practice questions/concepts:
-
Why would silicic lava be more likely to be explosive?
-
Describe how a porphyritic rock might form.
-
Explain how Bowen's Reaction Series also relates to how minerals will
weather.
-
Know the relationships between [Si], [Mg], [Fe], viscosity, overall
composition,
explosiveness, and eruptive temperature.
-
What are the small bubbles found in some extrusive igneous rocks called?
-
What is the volcanic rock that has the composition of granite?
-
What are the two most abundant igneous rocks?
-
How does the presence of volatiles, such as water, affect grain-size?
-
How does the chemical composition of magma affect its viscosity?
-
What type of pyroclastic rock commonly floats?
-
Would a gabbro be composed of olivine and quartz? Why or why not?
-
How might a piece of sedimentary rock be found within an extrusive
igneous
rock?
-
Understand the difference between a sill and a dike and relative ages
based
on fundamental geologic principles.
-
What are rocks that are taken from the surrounding material and
incorporated
into magma as coherent pieces are called?
-
What is an outcrop of intrusive igneous rock called if it has an area
greater
than 100 km2?
-
What is an outcrop of intrusive igneous rock called if it has an area
less
than 100 km2?