TEST 6 (UNIT 6- Sedimentary Rocks)

Date: 2015-10-07; view: 529.

Choose the correct item.

1. Clastic sedimentary rocks are made from ________________

A. pre-existing rocks

B. fragments

C. sediments

2. Sedimentary rocks mainly cover_________________

A. sea floor and land

B. ocean floor and land

C. shoreline and terrain

3. Beds are_______________

A. horizontal strata of sandstones and limestone

B. vertical layers of deposited sediments

C. horizontal sheets of deposited sediments

4.Coal is rich in __________________

A. oxygen

B. carbon

C. hydrogen

5. Lignite is _________________

A. hard black coal

B. soft brown coal

C. high-carbon coal

6.Coal forms as a result of _________________

A. weathering of rocks

B. chemical dissolution of minerals

C. dying of plants in wet acid conditions

8.Chalk is __________________

A. mudstone

B. sandstone

C. limestone

9.Which of the following CANNOT be the origin of limestone is__________

A. seawater reefs

B. seawater microorganisms

C. seawater minerals

10. These three minerals settle in the following sequence:

A. calcium carbonate, gypsum, sodium chloride

B. gypsum, calcium carbonate, sodium chloride

C. sodium chloride, calcium carbonate, gypsum

11.There are four main grain-size groups for clastic rocks:_____________

A. conglomerates, sandstones, siltstones, claystones

B. sandstones, siltstones, claystones, mudstones

C. conglomerates, sandstones, limestones, claystones

12.Sedimentary particles according to size are divided into ______________

A. two groups

B. three groups

C. four groups

13.Fine-grained sedimentary rocks are _____________________

A. mudstone, shale, orthoquartizite

B. mudstone, shale, siltstone

C. shale, arkose, greywacke

14.Rudites can be consolidated into natural concretes called______________

A. conglomerates and breccias

B. clasts and conglomerates

C. breccias and clasts

15.Conglomerates is a Latin word which means_________________

A. coarse

B. rubble

C. lumped together

16.Breccias is usually embodies in_________________

A. natural cement sand

B. solid rock

C. clay-rich matrix

17.The Earth's crust is mainly made up of _______________

A. igneous rocks

B. sedimentary rocks

C. metamorphic rocks

18.An example of mechanical sediments is ________________

A. gravel

B. gypsum

C. limestone

19.Sedimentary rocks result from the following processes________________

A. weathering, erosion, deposition, cementation

B. erosion, transportation, cementation, compaction

C. weathering, transportation, deposition, lithification

20.Classification by grain size is applied to ________________

A. clastic sediments

B. debris

C. sand particles

21.The grain size of clastic rocks ranges from ___________________

A. 2 to 1/16

B. 1/16 to 1/256

C. 2 to 1/256

22.The main bulk composition of continental sedimentary rock is__________

A. shale

B. sandstone

C. conglomerate

23.Cemented mass of shelly debris is__________

A. chalk

B. sandstone

C. coquina

24.Another term for halite is ____________

A. rock gypsum

B. chalk rock

C. rock salt

25.Chemical deposits accumulate in desert lakes and______________

A. coastal salt flats

B. seashore salt areas

C. undersaturated seawaters

26.Sedimentary facies are ___________________

A. characteristic physical and chemical attributes

B. characteristic features of rocks

C. environmental features of rocks