Geology of North America's West Coast
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Questions and Answers

Which type of mountains are the Andes an example of?

  • Continental-oceanic collision
  • Continental-continental collision (correct)
  • Oceanic-oceanic collision
  • Oceanic-continental collision

What is the term used to describe the crustal fragments of exotic material that are appended onto a continent during subduction?

  • Microcontinents
  • Batholiths
  • Forearc basins
  • Terrains (correct)

What is the process where islands or microcontinents get stuck onto a continent during subduction called?

  • Accretion (correct)
  • Deposition
  • Erosion
  • Sublimation

Which mountain range formed when Pangaea came together?

<p>Appalachians (B)</p> Signup and view all the answers

What is the term for mountain building?

<p>Orogenesis (B)</p> Signup and view all the answers

Which type of mountains result from the steady subduction of lithosphere?

<p>Island Arc Mountains (C)</p> Signup and view all the answers

Which process causes small features to be subducted at convergent plate boundaries?

<p>Subduction (A)</p> Signup and view all the answers

What happens to the melting point of rock when water is present?

<p>It decreases (C)</p> Signup and view all the answers

What happens to the small features that get subducted at convergent plate boundaries?

<p>They get melted (D)</p> Signup and view all the answers

Which type of fault is characterized by vertical movement of the crust?

<p>Normal fault (D)</p> Signup and view all the answers

What type of stress is associated with strike slip faults?

<p>Shear stress (A)</p> Signup and view all the answers

Which fault is an example of a strike slip fault?

<p>San Andreas Fault (B)</p> Signup and view all the answers

Which type of convergence is exemplified by the Andes Mountains?

<p>Oceanic-continental convergence (D)</p> Signup and view all the answers

What type of rock is formed at the core of mountain chains formed by subduction?

<p>Igneous rock (D)</p> Signup and view all the answers

What is the initial stage of a convergent plate boundary called?

<p>Passive margin (A)</p> Signup and view all the answers

During the break of Pangaea, which plate began to subduct under North America?

<p>Farallon Plate (A)</p> Signup and view all the answers

What is the name of the plate that is currently off the coast of California?

<p>Pacific Plate (C)</p> Signup and view all the answers

What is the name of the plate that is left of the Farallon Plate?

<p>Juan de Fuca Plate (A)</p> Signup and view all the answers

Which type of mountain building exhibits deformation of a thick sequence of sedimentary rock called a golden thrust belt?

<p>Appalachian type (C)</p> Signup and view all the answers

Which mountain range is similar to the Appalachian Mountains and is found in northern Europe?

<p>Himalayan Mountains (B)</p> Signup and view all the answers

Which process takes place over millions of years and causes mountain ranges to erode away?

<p>Erosion (A)</p> Signup and view all the answers

What happens to the height of mountain ranges as they erode away?

<p>They decrease (B)</p> Signup and view all the answers

What is the force that pushes up mountain ranges called?

<p>Uplift (D)</p> Signup and view all the answers

What is the point of isostacy?

<p>To maintain balance between gravity and uplift (C)</p> Signup and view all the answers

How long does the process of crustal deformation usually take?

<p>Thousands or millions of years (A)</p> Signup and view all the answers

Which two continents collided to form the Appalachian Mountain range?

<p>Africa and North America (C)</p> Signup and view all the answers

What is the name of the orogeny that formed the southern part of the Appalachian Mountain range?

<p>Allegheny orogeny (C)</p> Signup and view all the answers

What principle explains why continental crust floats higher than oceanic crust in the mantle?

<p>Isostasy (A)</p> Signup and view all the answers

What is the term for the adjustment of the crust due to weight being added or removed?

<p>Isostatic adjustment (D)</p> Signup and view all the answers

What is the term for the rebound of the crust after the melting of a large ice sheet?

<p>Isostatic rebound (A)</p> Signup and view all the answers

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