GEOL 270: Sedimentology and Stratigraphy Lecture 2 Quiz
18 Questions
0 Views
3.6 Stars

GEOL 270: Sedimentology and Stratigraphy Lecture 2 Quiz

Created by
@WondrousTerbium

Questions and Answers

What type of clast shape is formed when the edges of equally spaced fracture planes in all directions are rounded off?

Equant

Which type of clast shape is less common and forms mainly from metamorphic rocks with a strong linear fabric?

Rod-shaped or prolate

What is the relationship between imbrication and flow direction as clasts settle?

Imbricated clasts dip upstream

What type of rocks are most likely to form elongated clasts due to breaking along the foliation plane?

<p>Metamorphic rocks</p> Signup and view all the answers

What is the typical dip angle of sand grains showing well-developed imbrication?

<p>Less than 20°</p> Signup and view all the answers

What term is used to describe the overlapping arrangement of particles, like that of shingles on a roof?

<p>Imbrication</p> Signup and view all the answers

Which of the following statements about clastic sedimentary rocks is correct?

<p>Clastic sedimentary rocks are derived from the erosion and weathering of pre-existing rocks.</p> Signup and view all the answers

What is the term used to describe the size, shape, and arrangement of grains or particles in a sedimentary rock?

<p>Fabric</p> Signup and view all the answers

Which of the following best describes the term 'clast'?

<p>A particle or fragment derived from the erosion and weathering of pre-existing rocks.</p> Signup and view all the answers

What is the term used to describe the fine-grained material surrounding larger particles in a sedimentary rock?

<p>Matrix</p> Signup and view all the answers

Which of the following terms refers to the physical characteristics and mineral composition of a sedimentary rock?

<p>Lithology</p> Signup and view all the answers

Which of the following statements about grain size in sedimentary rocks is correct?

<p>Grain size can range from clay particles measured in microns to boulders measured in meters.</p> Signup and view all the answers

Which of the following is NOT a factor that influences the texture of siliciclastic rocks?

<p>Grain sorting</p> Signup and view all the answers

What is the term used to describe the spatial arrangement and orientation of grains in a sedimentary rock?

<p>Fabric</p> Signup and view all the answers

Which of the following grain size classes is defined by a range of $4-63 \ ext{mu} m$?

<p>Silt</p> Signup and view all the answers

Which term is used to describe a conglomerate where the clasts are angular in shape?

<p>Breccia</p> Signup and view all the answers

Which term is used to describe a conglomerate where the clasts are composed of only one type of rock?

<p>Monomict</p> Signup and view all the answers

Which textural characteristic of a conglomerate indicates that it was deposited by bedload transport, like in a river?

<p>Clast-supported</p> Signup and view all the answers

Use Quizgecko on...
Browser
Browser