MAGNITUDE 9
109 yrs
MAGNITUDE 8
108yrs
MAGNITUDE 7
107 yrs
MAGNITUDE 6
106 yrs
MAGNITUDE 5
105 yrs
MAGNITUDE 4
104 yrs
MAGNITUDE 3
103 yrs
MAGNITUDE 2
102 yrs
MAGNITUDE 1
101 yrs
MAGNITUDE 0
100 yrs
THE COSMOS and EARLY LIFE FORMS
( BILLIONS of YEARS BEFORE Y2000 )
.
EON ERA PERIOD CLIMATE* CO2 O2 GEOLOGY BIOLOGY BY2000
    ZOOM to LAST BILLION YEARS     ZOOM to LAST BILLION YEARS     ZOOM to LAST BILLION YEARS     ZOOM to LAST BILLION YEARS
. . . 2% 3% RODINIA Fungi 1.1billion
. . STENIAN . . . . Amoebas / SEX 1.2billion
P MESO- . . . . continental dispersal Grenville orogeny Plants 1.3billion
R . ECTACIAN . . . . Multiform Acritarchs 1.4billion
O . . . 6% 2% ? COLUMBIA Eukaryotes / Multicell animal fossils 1.5billion
T 1.6billion CALYMMIAN . . . . . 1.6billion
E . . . . . continental aggregation . 1.7billion
R . STATHERIAN . . . COLUMBIA ? Grypania 1.8billion
O . . . . . Kimban orogeny . 1.9billion
Z . . . 9% 0.5% continental dispersal Hudsonian orogeny Acritarchs / Archeans 2.0billion
O . OROSIRIAN COOL . . . . 2.05billion
I PALEO- . . . . ? KENDORLAND . 2.1billion
C . . COLD . . Huron Ice age? . 2.2billion
. . RHYACIAN COLD . . continental aggregation . 2.3billion
. . . . . . plate tectonics . 2.4billion
2.5billion . SIDERIAN COOL 11% ~0% banded iron formations . 2.5billion
. . . . . . . . 2.6billion
. NEO- . . . . KENDORLAND ? . 2.7billion
. . . . . . large continental shields Photosynthesis 2.8billion
A . . . . . . Bacteria 2.9billion
R MESO- . . 15% 0% continent formation? . 3.0billion
C . . . . . . . 3.1billion
H . . . . . craton/shield formation O2 from Cynobacteria 3.2billion .
E . . . . . . . 3.3billion
A PALEO- . . . . . . 3.4billion
N . . . 20% 0% stromatolites Prokaryotes 3.5billion
. . . . . . . . 3.6billion
. EO- . . . . . . 3.7billion
3.8billion . . . . . volcanic rocks Oldest Microfossils 3.8billion
. EARLYIMBRIAN . . . . . Anaerobic Organisms 3.9billion
H NECTARIAN . HOT++ . . Late Heavy Bombardment . 3.95billion
A . . . 30% 0% . . 4.0billion
D . . . . . oldest known rock . 4.1billion
E RYDERIAN . . . . vulcanism . 4.2billion
A . . . . . start of water cycle . 4.3billion
N . . . 70% 0% oldest zircons . 4.4billion
A 4.5billion . . . . magma oceans . 4.5billion
4.56billion CRYPTIC . . . . . . 4.56billion
. . . HOT++ . . Theia moon formation event . 4.6billion
. . . . . . solar system formation . 4.7billion
. . . . . . . . 4.8billion
. . . . . . . . 4.9billion
. . . . . . . . 5.0billion
. . . . . . . . 5.1billion
. . . . . . . . 5.2billion
. . . . . . . . 5.3billion
. . . . . . . . 5.4billion
. . . . . . . . 5.5billion
. . . . . . . . 5.6billion
. . . . . . . . 5.7billion
. . . . . . . . 5.8billion
. . . . . . . . 5.9billion
. . . . . . . . 6.0billion
. . . . . . . . 6.1billion
. . . . . . . . 6.2billion
. . . . . . . . 6.3billion
. . . . . . . . 6.4billion
. . . . . . GALACTIC DISC FORMATION . 6.5billion
. . . . . . . . 6.6billion
. . . . . . . . 6.7billion
. . . . . . . . 6.8billion
. . . . . . . . 6.9billion
. . . . . . . 7.0billion
. . . . . . . . 7.1billion
. . . . . . . . 7.2billion
. . . . . . . . 7.3billion
. . . . . . . . 7.4billion
. . . . . . . 7.5billion
. . . . . . . . 7.6billion
. . . . . . . . 7.7billion
. . . . . . . . 7.8billion
. . . . . . . . 7.9m/td>
. . . . . . . 8.0billion
. . . . . . . . 8.1billion
. . . . . . . . 8.2billion
. . . . . . . . 8.3billion
. . . . . . . . 8.4billion
. . . . . . GALACTIC DISC FORMATION . 8.5billion
. . . . . . . . 8.6billion
. . . . . . . . 8.7billion
. . . . . . . . 8.8billion
. . . . . . . . 8.9billion
. . . . . . . 9.0billion
. . . . . . . . 9.1billion
. . . . . . . . 9.2billion
. . . . . . . . 9.3billion
. . . . . . . . 9.4billion
. . . . . . . 9.5billion
. . . . . . . . 9.6billion
. . . . . . . . 9.7billion
. . . . . . . . 9.8billion
. . . . . . [oldest known star HE 1523-0901] . 9.9billion
. . . . . . [13.2billion] . 10.0billion
EON ERA PERIOD CLIMATE* CO2 O2 GEOLOGY BIOLOGY BY2000
*estimated Mean Sea Surface Temp layer @ Latitude 45

MAGNITUDE 9
109 yrs
MAGNITUDE 8
108yrs
MAGNITUDE 7
107 yrs
MAGNITUDE 6
106 yrs
MAGNITUDE 5
105 yrs
MAGNITUDE 4
104 yrs
MAGNITUDE 3
103 yrs
MAGNITUDE 2
102 yrs
MAGNITUDE 1
101 yrs
MAGNITUDE 0
100 yrs