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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





Act 3

“The DCM”

PALEOZOIC SEDIMENTATION


The Great Unconformity

Paleozoic

Proterozoic


The Great Unconformity

Paleozoic

Proterozoic


Angular unconformity?

Disconformity?

Nonconformity?



Shinumo Quartzite “islands”

Tapeats Sandstone

Grand Canyon Supergroup



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

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



EVENTS

Pangaea

Rapid Sea Floor Spreading

Sediment Transfer into Oceans

Pannotia


What kind of unconformity is it?

Tapeats Sandstone

Vishnu schist








Typical exposures

Bright Angel Shale


Redwall

Muav

Tonto Platform

Bright Angel

Tapeats





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