HOME Cambrian Period (542MA-488.3MA) Ordovician Period (488.3-443.7MA) Silurian Period (443.7MA-416MA) History Timeline Index

488.3 MA
ORDOVICIAN488.3 PERIOD (45.3 M) (488.3-443 MA)
Ice Age in Africa
Chordates appear
Graptolites
Corals
LOWER ORDOVICIAN 488 EPOCH (16.5 M)(488.3-471.8 MA)
TREMADOCIAN488 STAGE (9.7 M) (488.3-478.6 MA)
478.6 MA
FLOIAN478.6 STAGE (6.8 M) (478.6-471.8 MA)
471.8 MA
MIDDLE ORDOVICIAN471.8 EPOCH (10.9 M) (471.8-460.9 MA)
STAGE I - MID ORDIVICIAN (3.7 M) (471.8-468.1 MA)
STAGE 2 - MID ORDIVICIAN (7.20) (468.1-460.9 MA)
460.9 MA
UPPER ORDOVICIAN460.9 EPOCH (17.20) (460.9-443.7 MA)
SANDBIAN460.9 STAGE (5.10 M) (460.9-455.8 MA)
455.8 MA
KATIAN455.8 STAGE (10.2 M) (455.8-445.6 MA)
450 MA
Sharks appear? (450-420 MA)
445.6 MA
HIMANTIAN445.6 (1.9 M) (445.6-443.7 MA)

HOME Cambrian Period (542MA-488.3MA) Ordovician Period (488.3-443.7MA) Silurian Period (443.7MA-416MA) History Timeline Index