Historical Geology

Homework 3 Name _______________________________

Read 07.PDF; 31.PDF; and 25.PDF and answer the following questions.

Feldman, R. M., 1996, 07.pdf

1. What is the difference between a body fossil and an ichnofossil?

2. What type of depositional environment is most likely to deposit sediments that will contain fossils?

Shrake, D. L., 1995, 31.pdf

1. Trilobites belong in the Phylum ____________________________.

2. Isotelus is found in __________________________ age rocks.

3. How big is the Huffman Dam specimen of Isotelus? ________________________________

Pojcta, J. Jr. and D. A. Springer, 2001, 25.pdf

1. What type of animals are typical of the Paleozoic Era?

2. What type of animals are typical of the Mesozoic Era?

3. What type of animals are typical of the Cenozoic Era?

4. Define a species?

5. What are the four main points of Darwin’s Theory of natural selection?

6. How is “punctuated equilibrium different from Darwin’s original model for the origin of species?

7. What is the ultimate source of genetic variation?

8. Why do scientist think amphibians may have evolved from “lobe-finned” fish?

9. What fossil lead Huxley to hypothesis the birds are descendent from dinosaurs?

10. When do mammals first appear in the fossil record?