Look in your book. What are the two epochs of the Quaternary Period? 1 OOO Dashboard Calendar To Do Notifications Inbox 1:09 Relative dating 4U.pdf GSA GEOLOGIC TIME SCALE 1.4.0 MESOZOIC PALEOZOIC PRECAMBRIAN 63 CENOZOIC AGE ERA PERIOD NEOPRO TONIAN STENIAN оно. BOTAS BURDIGALIAN Geologic Time Scale Divisions of Earth’s History LUTETIAN SIITTI VAREN THANETIAN SGLANDUAN DANAN THE GEOLOGICAL SOCIETY OF AMERICA ‘The Poe is divided into our us, but was some bare also be inclytheists 1.71 Medom 1. i 13 and Laterno Walkar Dawan, Juving 5. adabad, LI.com, 2012. Gadiogic TS.Gagal Society of musica, 1.002 CORE 2 The Geological Society mala REFERENCES.COM, K., Sd Cast L.2012. Saligraphic Data Carrinca ce Sig.phys. Choose Grad, S. 16 SchD, 2012. The Cologie Time Salle 2012 STOEBEST-SOUS-1.000 64 Eons • The largest unit of geologic time is the eon. • Earth has four eons: Hadean, Archean, Proterozoic, and Phanerozoic. • (Some books leave out the Hadean.) 65 Precambrian • Geologists tend to lump the Proterozoic, Archean and Hadean Eons together, into the “Precambrian.” Why do you think this is? 66 Question • The Earth is 4.6 billion years old. • The Phanerozoic is the last 541 million years. • So what percentage of Earth’s history is represented by the Precambrian? (See fig. 1 Dashboard Calendar To Do Notifications Inbox 1:09 Relative dating 4U.pdf ☆ st 69 Epochs • Periods are divided into epochs. • Look in your book. What are the two epochs of the Quaternary Period? 70 Questions • Look at page 486. • Are the periods all the same length of time? What about the eras and eons? • Why is that? 71 Questions • Look again at page 486. • The Precambrian isn’t divided into periods. • The Paleozoic and Mesozoic aren’t divided into epochs. • Why is that? GSA GEOLOGIC TIME SCALE 40 MESOZOIC PALEOZOIC PRECAMBRIAN 72 CENOZOIC ADE AGA PER NEORD TOMAN STEIN ALBAR MEBORD TERORDIC BOTASUN GALVAN AQUITAIN STATIERAN DATTIAN OROSRIAN PALEOPRO RUPELIN HACIAN PRIBONIA BARTORAN LUTETIN ARDHEAN YPRESIN PWLED VINH 1 OOO Dashboard Calendar To Do Notifications Inbox 1:09 Relative dating 4U.pdf ☆ st into epochs. • Why is that? 1.4.0 GSA GEOLOGIC TIME SCALE MESOZOIC PALEOZOIC PRECAMBRIAN 72 CENOZOIC AGE AGE AGE CRA PERIOD NEOPRD LANCARAN CRVENAN TONIAN TORTORAN STENA SERRALLIAN LANGEN ALBAN MESOPRO TEROR BOTAS BURDIGAN ΑΡΤΑ GALVAN ADUITAN STATIERAN DUTAN TERUS BELIAN VACAN EVEN SERIAN PAD ECOARCHE LUTETIN MESO RHATIAN YPAESAR ARDEAN DANIAN THE GEOLOGICAL SCXCIETY OF AMERICA Telecame down the What was om te do Gitar. J. Bourg SA, and cod LS2, Galege Twengalackya keris, SBRIE The Geological Society The Comic Walked Pican thereof the hanc Rossidable to the 2012 and Chat 20comprend paket beds Founded to remember for the new android pe fere Gescind to procedere Gebe po BERRIES CITOPL Delerational Care este cel poate de Chat Grada OJ. Schmidt, The Badogle Tree Boon, USA. DE —- 73 The End 1 000 Dashboard Calendar To Do Notifications Inbox

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