Section #: 18.2 Intrusive Activity

Practice Test
      
  1.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    
      
  2.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    
      
  3.A __________ is a large intrusive igneous rock body that covers at least 100 square km.  
  a.   batholith  
  b.   laccolith  
  c.   sill  
  d.   dike  
  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.A tabular pluton that cuts across preexisting rock is called a __________.  
  a.   dike  
  b.   sill  
  c.   laccolith  
  d.   stock  
  Hint    
      
  6.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    
      
  7.A __________ is a mushroom-shaped pluton with a round top and flat bottom.  
  a.   sill  
  b.   laccolith  
  c.   batholith  
  d.   stock  
  Hint    
      
  8.What type of texture do most plutons have?  
  a.   coarse grained  
  b.   fine grained  
  c.   pegmatitic  
  d.   intermediate grained  
  Hint    
      
  9.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    

 
   
McGraw-Hill / Glencoe
The McGraw-Hill Companies