Geology Reference
In-Depth Information
TABLE 20.1
Summary of Early Paleozoic Geologic and Evolutionary Events
Relative
Changes
in Sea Level
Cordilleran
Mobile
Belt
Craton
Ouachita
Mobile
Belt
Appalachian
Mobile Belt
Major Events
Outside
North
America
Major
Evolutionary
Events
Rising Falling
416
Acadian
orogeny
First jawed
fish evolve
Extensive
barrier
reefs and
evaporites
common
Caledonian
orogeny
Early land
plants—
seedless
vascular plants
444
Extinction of
many marine
invertebrates
near end of
Ordovician
Plants move to
land?
Queenston
Delta clastic
wedge
Continental
glaciation in
Southern
Hemisphere
Taconic
orogeny
Present
sea
level
Transgression
of Tippecanoe
Sea
Major adaptive
radiation of all
invertebrate
groups.
Regression
exposing large
areas to erosion
488
Canadian shield
and Transcon-
tinental Arch only
areas above sea
level
Many
trilobites
become
extinct near
end of
Cambrian
Earliest
vertebrates—
jawless fish
evolve
Transgression of
Sauk Sea
542
Important Terms
Absaroka Sequence (p. 542)
Acadian orogeny (p. 550)
Ancestral Rockies (p. 544)
Antler orogeny (p. 553)
Appalachian mobile belt (p. 525)
Baltica (p. 525)
Caledonian orogeny (p. 550)
Catskill Delta (p. 551)
China (p. 525)
clastic wedge (p. 549)
Cordilleran mobile belt (p. 525)
cratonic sequence (p. 529)
cyclothem (p. 542)
epeiric sea (p. 524)
Franklin mobile belt (p. 525)
Gondwana (p. 525)
Hercynian-Alleghenian orogeny
(p. 552)
lapetus Ocean (p. 546)
Kaskaskia Sequence (p. 539)
Kazakhstania (p. 525)
Laurasia (p. 526)
Laurentia (p. 525)
mobile belt (p. 525)
organic reef (p. 537)
Ouachita mobile belt (p. 525)
Ouachita orogeny (p. 553)
Panthalassa Ocean (p. 529)
Queenston Delta (p. 549)
Sauk Sequence (p. 531)
sequence stratigraphy (p. 529)
Siberia (p. 526)
Taconic orogeny (p. 547)
Tippecanoe Sequence (p. 536)
Transcontinental Arch (p. 532)
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