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Act 2 LATE PROTEROZOIC SEDIMENTATION AND RIFTING PowerPoint PPT Presentation


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Act 2 LATE PROTEROZOIC SEDIMENTATION AND RIFTING. Grand Canyon Supergroup. basalt. Block-faulted mountains. Normal faults. Grand Canyon Supergroup. Act 3 “The DCM” PALEOZOIC SEDIMENTATION. The Great Unconformity. Paleozoic. Proterozoic. The Great Unconformity. Paleozoic. Proterozoic.

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Act 2 LATE PROTEROZOIC SEDIMENTATION AND RIFTING

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Act 2

LATE PROTEROZOIC SEDIMENTATION AND RIFTING


Grand Canyon Supergroup

basalt


Block-faulted mountains

Normal faults


Grand Canyon Supergroup


Act 3

“The DCM”

PALEOZOIC SEDIMENTATION


The Great Unconformity

Paleozoic

Proterozoic


The Great Unconformity

Paleozoic

Proterozoic


Angular unconformity?

Disconformity?

Nonconformity?


Angular unconformity


Shinumo Quartzite “islands”

Tapeats Sandstone

Grand Canyon Supergroup


The Great Unconformity


EVENTS

Pangaea

Pannotia


EVENTS

Pangaea

Grand Canyon Sequence

Pannotia


EVENTS

Pangaea

Pannotia


EVENTS

Pangaea

Orogeny

Orogeny

Slower Sea Floor Spreading

Orogeny

Orogeny

Rapid Sea Floor Spreading

Sediment Transfer into Oceans

Pannotia


Deposition


Deposition

transgressions


Unconformities

(no sediment record)


Unconformities

(no sediment record)

regressions


4th

4th

Cratonic sequences

3rd

3rd

2nd

2nd

1st

1st


KNOW THE CANYON’S HISTORY

STUDY ROCKS TRULY MADE BY TIME

4th

3rd

2nd

1st


The First Transgression


EVENTS

Pangaea

Rapid Sea Floor Spreading

Sediment Transfer into Oceans

Pannotia


What kind of unconformity is it?

Tapeats Sandstone

Vishnu schist


What kind of unconformity is it?

Nonconformity


Tidal lenses


Tapeats Sandstone


Name?


(hint)


Bright Angle Shale


Typical exposures

Bright Angel Shale


Redwall

Muav

Tonto Platform

Bright Angel

Tapeats


Good exposures where rapidly eroded.


Muav Limestone on Kaibab Trail


Muav Limestone at Royal Arch


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