Geology Reference
In-Depth Information
TABLE 22.3
Mesozoic Geologic Events
Cordilleran
Mobile Belt
Geologic
Period
Sequence
Relative Changes
in Sea Level
Gulf
Coast
Region
Eastern
Coastal
Region
Global Plate
Tectonic
Events
Rising Falling
66
Major Late
Cretaceous
transgression
Laramide
orogeny
Appalchian
region uplifted
South America
and Africa are
widely separated
Reefs particularly
abundant
Greenland begins
separating from
Europe
Cretaceous
Sevier
orogeny
Regression at end
of Early Creatceous
Early Cretaceous
transgression
and marine
sedimentation
Erosion of fault-
block mountains
that formed
during the Late
Triassic to Early
Jurassic
Present
sea level
Nevadan
orogeny
146
Sandstones,
shales, and
limestones are
deposited in
transgressing and
regressing seas
South America
and Africa begin
separating in the
Late Jurassic
Jurassic
Thick evaporites
are deposited in
newly formed
Gulf of Mexico
Fault-block
mountains and
basins develop
in eastern North
America
200
Deposition of
Newark Group;
Iava flows, sills,
and dikes
Breakup of
Pangaea begins
with rifting
between Laurasia
and Gondwana
Supercontinent
Pangaea still in
existence
Subduction zone
develops as a
result of westward
movement of
North America
Gulf of Mexico
begins forming
during Late Triassic
Triassic
Sonoma orogeny
251
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