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GLGY 301 > 8 Early Paleozoic > Flashcards

8 Early Paleozoic Flashcards

1
Q

What happened to Rodinia during this period?

A

Faulting and thinning that lead to the break up of Rodinia and the onset of continental drift which generated oceanic crust

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2
Q

What is passive margin

A

This means there was no active tectonics at the time

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3
Q

What kind of post-rifting of Rodinia?

A

Seafloor spreading (passive subsidence)

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4
Q

What period is Sauk I (Gog group) from?

A

Early Cambrian

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5
Q

What kind of rock is in the Sauk I (Gog group)?

A

Mostly sandstones and some clastics

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6
Q

What age range is Sauk I (Gog group) from?

A

542-513 Ma

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7
Q

Where can you see the Gog Group? (2)

A
  1. Western main range of the Canadian Rockies in AB & BC
  2. Cariboo Mountains and in central Purcell Mountains in SW BC
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8
Q

What sedimentary rocks are in the Gog group?

A
  1. Thick cross-bedded quartzite
  2. Mudstones, siltstones limestone and dolostone
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9
Q

What kind of fossil could you find in the Gog group? (2)

A
  1. Trilobite
    2.Brachiopod
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10
Q

What is the Cambrian Explosion?

A

A time when there was an explosion in the number of hard-body organisms we see in the rock record

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10
Q

What’s the first skeletal reef-builder in life history?

A

Archaeocyathid
*Slide 29

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11
Q

What is the main theory that caused the Cambrian explosion?

A

Increase in Oxygen

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12
Q

What period is Sauk II (Chancellor Formation) from?

A

Middle Cambrian

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13
Q

What kind of rocks are in the Sauk II (Chancellor Formation)? (2)

A
  1. Fine clastics
  2. Platform/ shelf/ basin carbonates
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14
Q

Where are the Chancellor Group outcrops? (2)

A
  1. Main range of the Canadian Rockies in AB & BC
  2. Cariboo mountains and in the central Purcell mountains in SW BC
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15
Q

Slide 40

A
16
Q

What is the Kicking Horse Rim?

A

The transition from deep water shale to sea carbonates in the rock record

17
Q

What is a good example of the middle Cambrian shallow water platform carbonates?

A

Castle Mountain

18
Q

What is the famous middle Cambrian deep water shale?

A

Burgess Shale

19
Q

Slide 48-62

A
20
Q

What creates the cathedral escarpment (kicking horse rim)?

A

Cambrian and Ordovician Platform to slope change

21
Q

What period is Kaskaskia I (Fairholme Group) from?

A

Early and middle Devonian

22
Q

What kind of rocks are in the Fairholme group?

A

Platform/shelf/basin carbonates

23
Q

What notable ocean formation in the Fairholme Group?

A

Large reefs.
Named the Peace River Arc and Western Alberta Ridge
Slide 72

24
Q

What makes the reefs important in the Fairholme group?

A

These areas are rich in oil

25
Q

Slide 74-76

A
26
Q

Slide 86-95

A

GLGY 301 (14 decks)

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