3/22/24, 10:06 PM
Geology: Chapter 7 Flashcards | Quizlet
https://quizlet.com/214775822/geology-chapter-7-flash-cards/
2/6
Clastic sedimentary rocks are classified
primarily on the basis of _____.
sediment size
A(n) _____ occurs when the sea retreats
because sea level drops and/or land is
uplifted.
regression
Match the environmental depositional shift
to its correct description.
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.
Breccia: angular clasts
Conglomerate: rounded clasts
Rank the particle sizes from smallest to
largest.
1.) clay
2.) silt
3.) sand
4.) pebble
5.) cobble
6.) boulder
Which of these resources are contained in
sedimentary rocks?
- 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.
sand
Sedimentary rocks are usually comprised of
material that comes primarily from _____.
other locations
Geologists use characteristics such as
bedding, mudcracks, and color preserved in
sedimentary rocks to determine _____.
the environment in which the rocks were deposited
What are the three types of beds formed by
sedimentary layers?
- cross
- graded
- parallel
_____ is the term used to describe the size
range of clasts in a sedimentary deposit or
rock.
Sorting
Loose sand on the continental shelf or shelf
slope that becomes unstable and flows
downslope as a thick slurry of sediment and
water is known as _____.
a turbidity current
Limestone and other related sedimentary
rocks are also called _____ rocks because they
are composed of carbonate ions bonded to
other elements.
carbonate
Fluvial refers to _____.
the processes and sediment of streams and rivers
Geology: Chapter 7
