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1 Cretaceous Period: Environmental and Tectonic Events Sea Level and Cratonic Sequences Cretaceous Paleogeography Western Margin Tectonics Why does Deformation Migrate Eastward? Sevier Orogeny
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Page 1: Cretaceous Period: Environmental and Tectonic Eventsw3.salemstate.edu/~bhubeny/GLS201/CretaceousEnv_Tec.pdf · 2009. 4. 24. · PERIOD Neogene Paleogene Cretaceous Jurassic Triassic

1

Cretaceous Period:Environmental and

Tectonic Events

Sea Level and Cratonic Sequences

Cretaceous Paleogeography Western MarginTectonics

Why doesDeformation

MigrateEastward?

Sevier Orogeny

Page 2: Cretaceous Period: Environmental and Tectonic Eventsw3.salemstate.edu/~bhubeny/GLS201/CretaceousEnv_Tec.pdf · 2009. 4. 24. · PERIOD Neogene Paleogene Cretaceous Jurassic Triassic

2

Sevier Orogeny and Thrust FaultingWhere did

sediments fromSevier Orogeny

Accumulate?

Clastic Wedges Revisited! Cretaceous Climate

Larson, 1991

Ocean CrustFormation and

Climate

Changes inthe Rate ofSeafloor

Spreading

Page 3: Cretaceous Period: Environmental and Tectonic Eventsw3.salemstate.edu/~bhubeny/GLS201/CretaceousEnv_Tec.pdf · 2009. 4. 24. · PERIOD Neogene Paleogene Cretaceous Jurassic Triassic

3

Spreading Rates and Weathering:Feedback!

CO2 Feedbacks with Weathering


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