Section #: 18.2 Intrusive Activity

Practice Test
      
  1.What letter in the figure depicts the possible beginning of plutons like dikes and sills?



 
  a.   A  
  b.   B  
  c.   C  
  d.   none of the above  
  Hint    
      
  2.What is the name for an igneous intrusion that is smaller than a batholith but similar in shape?  
  a.   laccolith  
  b.   dike  
  c.   sill  
  d.   stock  
  Hint    
      
  3.What type of igneous pluton is tabular and parallel to surrounding rock layers?  
  a.   a dike  
  b.   a sill  
  c.   a batholith  
  d.   a stock  
  Hint    
      
  4.What letter in the figure depicts the possible beginning of a pluton like a stock?



 
  a.   A  
  b.   B  
  c.   C  
  d.   none of the above  
  Hint    
      
  5.What type of texture do most plutons have?  
  a.   coarse grained  
  b.   fine grained  
  c.   pegmatitic  
  d.   intermediate grained  
  Hint    
      
  6.A __________ is a mushroom-shaped pluton with a round top and flat bottom.  
  a.   sill  
  b.   laccolith  
  c.   batholith  
  d.   stock  
  Hint    
      
  7.A tabular pluton that cuts across preexisting rock is called a __________.  
  a.   dike  
  b.   sill  
  c.   laccolith  
  d.   stock  
  Hint    
      
  8.Which letter in the figure demonstrates magma melting rocks after they are broken off and sink?



 
  a.   A  
  b.   B  
  c.   C  
  d.   none of the above  
  Hint    
      
  9.A __________ is a large intrusive igneous rock body that covers at least 100 square km.  
  a.   batholith  
  b.   laccolith  
  c.   sill  
  d.   dike  
  Hint    

 
   
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