542 MA
PHANEROZOIC EON (542MA-p) PALEOZOIC542 ERA (290
M) (542-251 MA) CAMBRIAN542 PERIOD (53.7 M) (542-488.3
MA) Vendian
Supercontinent (Pannotia) breaks up in Early Cambrian
Avalonia
drifts northward from Gondwana
Iapetus
Ocean (600-400 MA)
Many
aquatic plants Some
plants invade land First shell-forming invertebrate animals - attributed to rising alkilinity of ocean Trilobites Paradoxides
- large Middle Cambrian trilobite of the Atlantic/Avalonian faunal culture
- good guide fossil Bracholopods
and many other invertebrates Shell
fossils begin to appear commonly EARLY
CAMBRIAN EPOCH (29
M)
(542-513
MA) TERRENEUVIAN
EPOCH (21
M)
(542-521
MA) FORTUNIAN
STAGE (14
M)
(542-528
MA) 528 MA
STAGE
2 (7
M)
(528-521
MA) 521 MA SERIES
2 (11
M)
(521-510 MA) STAGE
3 (6
M)
(521-515
MA) 513 MA MIDDLE
CAMBRIAN EPOCH (12 M) (513-501 MA) 515 MA
STAGE
4 (5
M)
(515-510
MA) 510 MA SERIES
3 (11
M)
(510-499 MA) STAGE
5 (3.5
M)
(510-506.5
MA) 506 MA
DRUMIAN
STAGE (3.5
MA)
(506.5-503
MA) 503 MA
GUZHANGIAN
STAGE (4
M)
(503-499 MA)501 MA LATE
CAMBRIAN EPOCH (12
M)
(501-488.3MA) 500 MA Gondwana Supercontinent forms (-200MA) 499 MA FURONGIAN
EPOCH (10.7
M)
(499-488.3 MA) PAIBIAN
STAGE (3
M)
(499-496
MA) 496 MA
STAGE
9 (4
M)
(496-492
MA) 492 MA
STAGE
10 (3.7
M)
(492-488.3)