Chapter 2 Quiz lab
1. What mineral composition is most characteristic of felsic rocks? a. olivine, pyroxene, and calcium-rich plagioclase
b. orthoclase, quartz, and biotite
c. calcium-rich plagioclase and hornblende with some olivine d. particles of volcanic ash welded together
2. What mineral composition is most characteristic of mafic rocks? a. olivine, pyroxene, and calcium-rich plagioclase
b. orthoclase, quartz, and biotite
c. sodium-rich plagioclase, hornblende, and quartz
d. particles of volcanic ash welded together
3. What mineral composition is most characteristic of intermediate rocks? a. olivine, pyroxene, and calcium-rich plagioclase
b. orthoclase, quartz, and biotite
c. sodium-rich plagioclase and hornblende with some quartz or biotite d. particles of volcanic ash welded together
4. When mafic lava breaks through fissures in the continental crust, which of the following often results? a. lava plateaus
b. composite volcanoes
c. lava domes
d. pyroclastic sheets
5. Which scenario is associated with mafic magma?
a. hot, fluid lava that forms a sh...