Exam 2 Geo 1301
1. What are the major rock groups?
-Igneous, sedimentary, metamorphic
2. The Columbia Plateau basalts (floor basalts) issued from fissures, which are now preserved as?
-Dikes
3. Remove crystals from an andesitic magma and you will get?
-A more felsic residual melt
4. Which of the following types of volcanoes is typically the largest in terms of overall volume?
-Shield Volcano
5. What minerals are involved in the continuous part of Bowen’s Reaction Series?
-Plagioclase Feldspar
6. Which of the following minerals (as shown by their chemical formulae) has a neutral (zero) charge given that Si= +4, Al= +3, Ca= +2, O= -2?
-CaSi2Al2O8
7. The differentiation of magmas due to removal of crystal is known as?
-Crystal Fractionation
8. Which of the following atoms has a net charge of negative one?
-5 protons and 6 electrons
9. The most common mineral or mineral group in the Earth’s crust is?
-Feldspar
10. Felsic rocks are?
-Have higher silica content than mafic rocks
11. Polymorphs are? -Minerals with the same chemical composition
12. The basic constituents of all matter are?
- Atoms
13. The most common elements in Earth’s crust in terms of weight are?
-Oxygen (O) and Silicon (Si)
14. Which of the following descriptions best fits the rock texture name “glassy”?
-No crystals are observed
15. Rocks are defined as?
-Aggregates of one or more minerals and/or glass
16. Devils Tower, a famous landmark/landform of the western Great Plains is?
- A volcanic deposit, largely the remnants of a volcanic conduit
17. Which of the following volcanoes is most likely to contain pillow lava?
-Deep-sea volcano
18. What is the international scientific term for a lava flow with a rough surface?
-aa
19. The most common type of rock produced in Iceland are?
-Mafic
20. The most abundant gas emitted by volcanoes are?
-Water vapor (H2O)
21. A common rock composed largely of potassium (K) feldspar, quartz and lesser
-Igneous, sedimentary, metamorphic
2. The Columbia Plateau basalts (floor basalts) issued from fissures, which are now preserved as?
-Dikes
3. Remove crystals from an andesitic magma and you will get?
-A more felsic residual melt
4. Which of the following types of volcanoes is typically the largest in terms of overall volume?
-Shield Volcano
5. What minerals are involved in the continuous part of Bowen’s Reaction Series?
-Plagioclase Feldspar
6. Which of the following minerals (as shown by their chemical formulae) has a neutral (zero) charge given that Si= +4, Al= +3, Ca= +2, O= -2?
-CaSi2Al2O8
7. The differentiation of magmas due to removal of crystal is known as?
-Crystal Fractionation
8. Which of the following atoms has a net charge of negative one?
-5 protons and 6 electrons
9. The most common mineral or mineral group in the Earth’s crust is?
-Feldspar
10. Felsic rocks are?
-Have higher silica content than mafic rocks
11. Polymorphs are? -Minerals with the same chemical composition
12. The basic constituents of all matter are?
- Atoms
13. The most common elements in Earth’s crust in terms of weight are?
-Oxygen (O) and Silicon (Si)
14. Which of the following descriptions best fits the rock texture name “glassy”?
-No crystals are observed
15. Rocks are defined as?
-Aggregates of one or more minerals and/or glass
16. Devils Tower, a famous landmark/landform of the western Great Plains is?
- A volcanic deposit, largely the remnants of a volcanic conduit
17. Which of the following volcanoes is most likely to contain pillow lava?
-Deep-sea volcano
18. What is the international scientific term for a lava flow with a rough surface?
-aa
19. The most common type of rock produced in Iceland are?
-Mafic
20. The most abundant gas emitted by volcanoes are?
-Water vapor (H2O)
21. A common rock composed largely of potassium (K) feldspar, quartz and lesser