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Olson and Lammers ( 1976 ) discredited this idea because they noted that the Glen Rose Formation is Cretaceous in age , and therefore not a likely source for a temnospondyl .
 Glen Rose
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Glen Rose