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    Seamount   
Subject: Geology
    An isolated volcanic peak that rises at least 1000 meters (3300 feet) above the deep-ocean floor. Reference:Tarbouk, E.J. & F.K. Lutgens, (2006), EARTH, 8th edition, Pearson Education International.
 
 
  
    Accuracy  
Subject: The Earth
    closeness of a measurement to a value thought to be true; repeatability can be estimated by repeated measurement, measured by variance for continuous measures; accuracy of classification for categories can be summarized by a misclassification matrix when compared to a survey of greater accuracy.
 
 
  
    Passive continental margin  
Subject: Geology
    A margin that consists of a continental shelf, continental slope, and continental rise. They are not associated with plate boundaries and therefore experience little volcanism and few earthquakes. Reference: Tarbouk, E.J. & F.K. Lutgens, (2006), EARTH, 8th edition, Pearson Education International.
 
 
  
    Shield volcano   
Subject: Geology
    A broad, gently sloping volcano built from fluid basaltic lavas. Reference:Tarbouk, E.J. & F.K. Lutgens, (2006), EARTH, 8th edition, Pearson Education International.
 
 
  
    Sill   
Subject: Geology
    A tabular igneous body that was intruded parallel to the layering of preČexisting rock. Reference:Tarbouk, E.J. & F.K. Lutgens, (2006), EARTH, 8th edition, Pearson Education International.
 
 
  
    Submarine canyon   
Subject: Geology
    A seaward extension of a valley that was cut on the continenČtal shelf during a time when sea level was lower, or a canyon carved into the outer continental shelf, slope, and rise by turbidity currents. Reference:Tarbouk, E.J. & F.K. Lutgens, (2006), EARTH, 8th edition, Pearson Education International.
 
 
  
    System  
Subject: Geology
    A group of interacting or interČdependent parts that form a complex whole. Reference:Tarbouk, E.J. & F.K. Lutgens, (2006), EARTH, 8th edition, Pearson Education International.
 
 
  
   A horizon  
Subject: Resources & Reserves
    The uppermost zone in the soil profile, from which soluble salts and colloids have been leached, and in which organic matter has accumulated. Reference: R.L. Bates & J.A. Jackson, DICTIONARY OF GEOLOGICAL TERMS, Third Edition, American Geological Institute, 1983.
 
 
  
   A/D  
Subject: Remote Sensing
    Analog to Digital. Used to refer to the conversion of analog data to its digital equivalent. Ref: Remote Sensing Glossary Reference Information for Virtual Nebraska
 
 
  
   AA  
Subject: Geography
    A term of Hawaiian origin. Used in reference to a basaltic lava that occurs in flows with a fissured, rough and jagged surface.


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