1. 
   Maastrichtian Age
   The Maastrichtian age was the last part of the Cretaceous period . It lasted from about 71 to 65 million years ago, at the very end of the Mesozoic Era . Many dinosuars existed during this age, but it ended with a major mass extinction (the K-T extinction ).
   Found op http://www.enchantedlearning.com/subjects/dinosaurs/glossary/
   
   
2. 
   Maastrichtian Stage
   uppermost of the six main divisions in the Upper Cretaceous Series, representing rocks deposited worldwide during the Maastrichtian Age, which ...
   Found op http://www.britannica.com/eb/a-z/m/2
   
   

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