1.In which geologic period did numerous modern phyla of animals appear? 2.How do

ID: 235642 • Letter: 1

Question

1.In which geologic period did numerous modern phyla of animals appear?

2.How do we define the base of the Cambrian?

3.What are cratonic sequences? What are their key characteristics?

4.Which cratonic sequences occurred during the Early Paleozoic? What are they important rock units we have from those sequences?

5.What caused the Taconic orogeny?

6.How did the Queenston clastic wedge (AKA Queenston delta) form? Where is it thickest?

7.What was the western margin of Laurentia like during the Early Paleozoic?

8.As the Sauk sea transgressed the continent, what did it deposit?

9.How do we determine paleotemperature using shells of marine invertebrates?

10.What caused the Acadian orogeny?

11.What is the significance of the Catskill clastic wedge?

12.What are cyclothems, and what is their significance?

13.What components came together to assemble most of Pangaea?

14.What caused the end-Permian mass extinction?

15.Which transgressions occurred during the Late Paleozoic? What are the important rocks from each?

16.During the Mississippian, what was the most common rock type that was deposited, and what was its most obvious characteristic?

17.Why might a marine life form make its shell from aragonite versus calcite?

18.In what period did numerous modern phyla of animals appear?

19.Why are the Tommotian fauna significant?

20.What happened to stromatolite populations during the Early Paleozoic? Why?

21.What happened to trilobite populations during the Early Paleozoic? Why?

22.What animals had developed the ability to burrow at this time? What evidence do we have for burrowing animals?

23.When did fish first evolve? What is the evidence for this?

24.Where did the jaws in fish come from?

25.What factors contributed to the rise in the number of animals with hard parts?

26.What happened to ammonoids in the late Paleozoic? How about crinoids?

27.What is the most likely reason for the disappearance of placoderms?

28.What are sphenopsids? Where were they found during the Carboniferous?

29.What happened to insects during the Carboniferous? What does that tell us about the atmosphere at that time?

30.What key adaptation do reptiles have that gives them an evolutionary advantage over amphibians?

31.When did the largest extinction in Earth’s history occur?

1. During Cambrian Explosion( 489.5 to 541 million years ago) numerous modern phyla of animals appear.

2.We define the base of the Cambrian as the time when the trace fossil Treptichnus pedum was first seen.

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