Homework for Geology
KEY to Homework Questions for Sedimentary and Metamorphic Rocks Lecture 6-7
Use these questions to test your knowledge of Sedimentary and Metamorphic Rocks
A. Short answer:
1. A rounded pebble would be a type of particle found in a conglomerate.
2. Salt and other minerals that form when a body of water dries up are called evaporites.
3. Sands are the size of detrital sediments larger than mudstones and smaller than conglomerates and breccias.
4. Coals are chemical sediments formed from trees that lived in coastal swamps.
5. Dynamothermal metamorphism develops from increased heat and pressure in an area of plate convergence.
6. Contact metamorphism takes place where rocks are heated by close contact with magma.
7. Foliation in gneisses is marked by the formation of distinct, single mineral bands of alternating felsic and mafic minerals.
8. Minerals stable in a narrow range of temperatures and pressures are called index minerals.
9. Quartzite is formed by metamorphism of relatively pure quartz sandstone, a type of sedimentary rock.
10. Contact metamorphism takes place where rocks are heated by close contact with magma.
B. Match the terms
1. Evaporite minerals f a. partially melted
2. Cementation g b. stable in narrow range T,P
3. Rounded particles > 2 mm e c. mud
5. Still water detrital sediment c d. dynamothermal metamorphism
4. New England d e. conglomerate
5. Banded metamorphic rock h f. gypsum and salt
6. Index mineral b g. glue grains together
7. Migmatite a h. gneiss
C. True or False?
1. Mudcracks are useful for "right-side-up" determinations. True or False?
2. The most abundant types of sedimentary rock are conglomerates. True
Use these questions to test your knowledge of Sedimentary and Metamorphic Rocks
A. Short answer:
1. A rounded pebble would be a type of particle found in a conglomerate.
2. Salt and other minerals that form when a body of water dries up are called evaporites.
3. Sands are the size of detrital sediments larger than mudstones and smaller than conglomerates and breccias.
4. Coals are chemical sediments formed from trees that lived in coastal swamps.
5. Dynamothermal metamorphism develops from increased heat and pressure in an area of plate convergence.
6. Contact metamorphism takes place where rocks are heated by close contact with magma.
7. Foliation in gneisses is marked by the formation of distinct, single mineral bands of alternating felsic and mafic minerals.
8. Minerals stable in a narrow range of temperatures and pressures are called index minerals.
9. Quartzite is formed by metamorphism of relatively pure quartz sandstone, a type of sedimentary rock.
10. Contact metamorphism takes place where rocks are heated by close contact with magma.
B. Match the terms
1. Evaporite minerals f a. partially melted
2. Cementation g b. stable in narrow range T,P
3. Rounded particles > 2 mm e c. mud
5. Still water detrital sediment c d. dynamothermal metamorphism
4. New England d e. conglomerate
5. Banded metamorphic rock h f. gypsum and salt
6. Index mineral b g. glue grains together
7. Migmatite a h. gneiss
C. True or False?
1. Mudcracks are useful for "right-side-up" determinations. True or False?
2. The most abundant types of sedimentary rock are conglomerates. True