Geology: Chapter 7 Pre-Test Exam Questions & Answers.
Sandstone is defined by being mostly or wholly composed of _____-sized grains. - CORRECT ANSWER sand
A formation is defined as ____. - CORRECT ANSWER A rock unit that is distinct and laterally traceable
Which of these rock types are c...
Geology: Chapter 7 Pre-Test Exam Questions & Answers.
Sandstone is defined by being mostly or wholly composed of _____-sized grains. - CORRECT ANSWER sand
A formation is defined as ____. - CORRECT ANSWER A rock unit that is distinct and laterally traceable
Which of these rock types are clastic sedimentary rocks? - CORRECT ANSWER - conglomerate
- sandstone - shale
Match the resource found in sedimentary rocks with its most common, current societal use. - CORRECT ANSWER - groundwater: fresh supplies essential to life
- petroleum: transportation and energy
- coal: electrical energy
- salt: food, medicine, industry
- limestone (cement): construction
Clastic sedimentary rocks are classified primarily on the basis of _____. - CORRECT ANSWER sediment size
A(n) _____ occurs when the sea retreats because sea level drops and/or land is uplifted. - CORRECT ANSWER regression
Match the environmental depositional shift to its correct description. - CORRECT ANSWER Transgression:
- the sea moves inland
- facies shift towards land
Regression: - facies shift away from land
- the sea moves out
Breccia and conglomerate are the coarsest types of sedimentary rocks. Match the rock type to the shape
of clast. - CORRECT ANSWER Breccia: angular clasts
Conglomerate: rounded clasts
Rank the particle sizes from smallest to largest. - CORRECT ANSWER 1.) clay
2.) silt
3.) sand
4.) pebble
5.) cobble
6.) boulder
Which of these resources are contained in sedimentary rocks? - CORRECT ANSWER - salt
- water
- coal
- uranium
As boulders are moved downstream and weathering breaks them into smaller clasts, they first become cobbles, then pebbles, and finally _____ or smaller particles. - CORRECT ANSWER sand
Sedimentary rocks are usually comprised of material that comes primarily from _____. - CORRECT ANSWER other locations
Geologists use characteristics such as bedding, mudcracks, and color preserved in sedimentary rocks to determine _____. - CORRECT ANSWER the environment in which the rocks were deposited
What are the three types of beds formed by sedimentary layers? - CORRECT ANSWER - cross
- graded
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