What does the KT boundary represent? Group of answer choicesThe end of the cretaceous period the beginning of the cenozoic eraThe end of the carboniferous period and the beginning of the permianThe end of the cenozoic era and the beginning of the mesozoicThe end of the mesozoic and the beginning of the paleozoic era

Following the devastation of End Permian came 'the age of reptiles'; this really covered the entire _________ Era, right up to the extinctions at End Cretaceous. A. Triassic B. Mesozoic C. Phanerozoic

(Q019) Which of the following was important in determining the cause of the K-Pg (Cretaceous-Paleogene) extinction?Group of answer choicesglass spheres in K-Pg boundary rocksiridium in K-Pg boundary clayshocked quarts in K-Pg boundary clayall of the possible answers are correct

Match the time frame listed on the left with the characteristic listed on the right.End of the Paleozoic eraEnd of the Mesozoic eraMesozoic era?Age of the dinosaurs?Most of Earth a desert?A layer of iridium deposited all over Earth

(Q004) Which geologic time interval saw the first continents, the first life, and possibly the first plates?Group of answer choicesHadeanPhanerozoicProterozoicArchean

Which of the following is the current era?A.PaleozoicB.PrecambrianC.MesozoicD.Cenozoic