Cenozoic life start of cenozoic era terary period 65

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: zoic Life – Triassic ~ 251 mya •  Breakup of Pangea (Supercon?nent) –  Laurasia and Gondwanaland •  Warm Climate Laurasia breakup Gondwana breakup Important Mesozoic Era Events •  First dinosaurs & mammals = Triassic Period (251 ­206 mya) •  Mass Ex?nc?on end of Triassic •  1st Birds & Angiosperms = Jurassic (206 ­144 mya) •  Diversifica?on mammals, birds & angiosperms in Cretaceous Period (144 ­65 mya) •  MASS EXTINCTION – Cretaceous ­Ter?ary (K ­T) 11 4/12/13 K ­T Boundary Ex?nc?on Event A 150-kilometer-wide crater lies just off the Yucatan peninsula, caused by a 10kilometer-wide asteroid traveling 30 kilometers per second -- 150 times faster than a 747. Cenozoic Life •  Start of Cenozoic Era (Ter?ary Period) ~65 MYA •  Age of Mammals  ­ Amer K ­T impact, radia?on of mammals, snakes, angiosperms, pollina?ng insects and teleosts into modern orders in Ter?ary Period (65 ­1.8 MYA) •  Paleocene – –  Insec?vores and rodents common –  Some grazers, but not huge ones (yet) –  Many “primi?ve”, lack specializa?ons – i.e., they are generalists. Purgatorius, possible ancestor to primates 12 4/12/13 Important Ce...
View Full Document

This note was uploaded on 02/02/2014 for the course ECOL 335 taught by Professor Reinthal during the Spring '10 term at University of Arizona- Tucson.

Ask a homework question - tutors are online