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Important Dates in Biosphere
stages of development, orogeny, life
20
Geology
Undergraduate 3
02/02/2012
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Term
Rodinia
 Definition
1.1 Ga
Term
Kenoran Orogeny
 Definition
2.5 Ga
Term
BIF=Oxygen in Atmosphere
 Definition
2.5-1.6 Ga
Term
Extinction of Ediacaran biota
 Definition
580 Ma
Term
Upwelling of brine, carbon dioxide decrease, sea level rise, metazoan diversification, Vendian extinction
 Definition
542 Ma
Term
Time of Slime
 Definition
3.0/2.9-2.0 Ga
Term
Oldest living organism: anaerobic prokaryotes
 Definition
3.5 Ga
Term
Chemoautotrophic bacteria
 Definition
>3.7 Ga
Term
Cyanophytes
 Definition
3.7-3.5 Ga
Term
Diverse prokaryotes
 Definition
3.5-2.9 Ga
Term
Eukaryote Bacteria: stromatilites
 Definition
2.9-2.0 Ga
Term
Acritarchs
 Definition
1.6-.7 Ga
Term
Zooplankton
 Definition
700-650 Ma
Term
Medusoids
 Definition
630 Ma-580 Ma
Term
Metazoan body imprints Ediacaran
 Definition
590 Ma
Term
First large Eukaryotes
 Definition
1.3-1.4 Ga
Term
Percent geologic time represented in rocks
 Definition
<50%
Term
Percent of all taxa preserved in rocks
 Definition
10%
Term
Cambrian biotas
 Definition
Hard parts: CaCO3, CaPO4, Si
Term
Cambrian Diversification
 Definition
Protection from predation, environmental changes
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