Answer: triassic

AnswerCrossword Clue
TRIASSICPeriod in which dinosaurs appeared
TRIASSICDinosaur time period
TRIASSICEarly dinosaur period
TRIASSICPeriod when dinosaurs appeared
TRIASSICVery old
TRIASSICMesozoic Era period
TRIASSICPeriod of the first dinosaurs
TRIASSICArizona's Petrified Forest dates from this period
TRIASSICPeriod bookended by extinction events
TRIASSICPeriod when mammals first appeared
triassicOf, relating to, or denoting the earliest period of the Mesozoic era, between the Permian and Jurassic periods
triassicrelating to the first period of the Mesozoic era
triassicThe Triassic period or the system of rocks deposited during it