geology

GEOLoGIC TIME ScALE LiFE GEOLOGIc EON ERA PERIOD EroCH DATES EVENTS WESTEVENTS EASZ

QuarternaryPleistocene Pliocene Miocene OWgocene Eocene

9Neo0 gene 23.8 Tertiary

Paleo- gene Paleocene 65 m ExTINCTION Gretaceous

L 142 m Jurassic 205.7 mexTINCTION Alantic opening Pangea breakup

1St

TriassicC TMammals Thecodont repues Mammall 248.2 mTINCTION Aes Permian ep First

repiies 290 m Glacia tion Coal Pennsylvaniane

Mississippian| 323 m

Crinoid Amphib

meadows ans 354 m ErTINCTION Tabulate Fish Stro commo ree Devonian Silurian

-ordovician Cambrian

417 m New Inyert.) and

radiation plants 443 m exTINCTION Gondwana glaciation Invertebrate adaptive

radiarion Trilobites common 495 m Cambrian invert.

radiation Ediacaran fauna first soft bodied

animals)

545 mTommatian stage Glacia lapetan openins Kendian stage hiphean stage ton

Late 9

Bitrer Springs fauna

Siberia/ NA i

apan Middle

1.6b Gunflint fauna

Oides probable eukaryoles Stromatolites

are abundant

Early 2.5 b

Barberton Fig Tree fauna Onverwacht fauna Warawoona fauna

Greenstone Earth Belt S. Africa

covered With (oldest fossils) any

micro contipenis

3960 m oldest rocks 4.6 b irst

continent crust L.S. Fichter, 19977

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