PALEO200 Lecture Notes - Lecture 9: Swampy, Geologic Time Scale, Mass Spectrometry

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

Document Summary

First multicellular life (2 bya: multicellularity likely first evolved in a algae. Vascular plants (cooksonia is the earliest known vascular plant) Moving out of the water (375 ma: group of medium sized fish called sarcopterygians began inhabiting shallower waters. Ability to breathe oxygen from air and support weight with their fins. Synapsids became the largest and most common group of land vertebrates (dimetrodon) The girdles of turtles (260 mya) o o. Carapace: turtle shell that is formed from the ribcage. Cryolophosaurs (prominent pompadour like crest across its skull) Long necked giants of the morrison formation (150 ma: by the late jurassic, dinosaurs evolved into some of the largest animals that had ever walked. English dinosaurs and the european archipelago (115 ma) o. In the early cretaceous, herbivorous iguanodons were the most common dinosaurs present: megalosaurus (first dinosaur ever to be named)