Period bookended by extinction events
Crossword Clue

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AnswerCrossword Clue
TRIASSICPeriod bookended by extinction events
PERMIANPeriod marked by the largest mass extinction in earth's history
olympiadA period of four years between Olympic Games, used by the ancient Greeks in dating events
blackest(of a period of time or situation) Characterized by tragic or disastrous events; causing despair or pessimism
redshirtsA college athlete who is withdrawn from college sporting events during one year in order to develop skills and extend the period of playing eligibility by a further year at this level of competition
indictionsA fiscal period of fifteen years used as a means of dating events and transactions in the Roman Empire and in the papal and some royal courts. The system was instituted by the Emperor Constantine in ad 313 and was used until the 16th century in some places
indictionA fiscal period of fifteen years used as a means of dating events and transactions in the Roman Empire and in the papal and some royal courts. The system was instituted by the Emperor Constantine in ad 313 and was used until the 16th century in some places