PALEO200 Lecture Notes - Lecture 9: Allosaurus, Quaternary, Diapsid

• School: University of Alberta
• Department: Paleontology
• Course: PALEO200
• Professor: Angelica Torices

Document Summary

> geologic time scale shows how the history of earth has been broken down into smaller and smaller chunks, usually based on major geological or biological events. > using radiometric dating techniques, geologists have estimated the oldest rocks on earth is about 4. 4 billion years old. > the mass extinction at the end of the permian period, which closes out the palaeozoic. Era led to an incredible time in history, the mesozoic era. the mesozoic era is the main focus of all the material in this course because it is best known as the age of dinosaurs. > another castrophic exintiction at the end of the cretaceous period marks the close of the. What is the era that we live in today: proterozoic, b) mesozoic, c) cenozoic, we live in the cenozoic. *** younger rocks are deposited on top of older rocks. > also use special symbols to tell us which kinds of rocks each formation has.