cretaceous period: environmental and tectonic...

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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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

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

Spreading Rates and Weathering:Feedback!

CO2 Feedbacks with Weathering

TRIASSIC JURASSIC CRETACEOUS PARK

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