Gen Sci Chapter 8 Crossword
                     
                     
                     
                     
                     
                     
                     
                     
                     
                     
                     
                     
                     
                     
                     
                     
                     
                     
 
 
Down: 1) A theoretical picture in which layers of rock from around the world are meshed together into a single, unbroken record of earth's past3) An uncoformity which has been "disguised" so that it does not look like an unconformity at all5) Time periods in earth's past Across: 2) A theory which states that all life on this earth has a single, common ancestor that existed a long time ago4) A creature that represents a link between one type of creature and another6) Areas where enormous deposits of fossils are concentrated7) A fossil considered to represent a certain period in earth's past
 

 

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