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Homework answers / question archive / Coastline Community College - GEOLOGY 105 Lab Lesson 9: Geologic Time Questions 1 through 3 are based on the Lab Exercise, Step 2
Coastline Community College - GEOLOGY 105
Lab Lesson 9: Geologic Time
Questions 1 through 3 are based on the Lab Exercise, Step 2.
Questio1)Record your answer to Lab Exercise, Step 2, Question 11. How long ago was the igneous rock in rock unit B formed?
Question 2
Record your answer to Lab Exercise, Step 2, Question 12. How long ago was the igneous rock in rock unit C formed?
Question 3
Record your answer to Lab Exercise, Step 2, Question 13.
How long ago was the metamorphic rock in rock unit G formed?
Questions 4 through 8 are based on the Lab Exercise, Step 3. 4.
Question 4
Record your answer to Lab Exercise, Step 3, Question 14. How long ago were the fossils found in Layer A formed?
Question 5
During what period were the fossils in Layer A formed?
Question 6
Record your answer to Lab Exercise, Step 3, Question 15. How long ago were the fossils found in Layer D formed?
Question 7
During what period were the fossils in Layer D formed?
Question 8
Record your answer to Lab Exercise, Step 3, Question 16. How long ago were the fossils found in Layer E formed?
Question 9
During what period were the fossils in Layer E formed?
Question 10
Record your answer to Lab Exercise, Step 3, Question 17. How long ago were the fossils found in Layer F formed?
Question 11
During what period were the fossils in Layer F formed?
Question 12
Record your answer to Lab Exercise, Step 3, Question 18. What is the least amount of
time that could have passed during the hiatus represented by younger unconformity seen in Figure 9.12?
Question 13
Record your answer to Lab Exercise, Step 3, Question 19. What is the least amount of time that could have passed during the hiatus represented by the older unconformity seen in Figure 9.12?
Question 14
Which of the following principles is NOT used in determining the relative age of rocks?
Question 15 through 19 are based on Figure 9.17 on page 208 of your lab book.
Questions 15
Determine the relative age each of the geologic structures shown in the geologic cross section in Figure 9.17, from youngest to oldest; then answer the questions below. As before, a wiggly line running across the geologic cross section indicates an unconformity and a fault is indicated with a bold straight line.
Which is the youngest geologic structure in Figure 9.17?
Question 16
Which is the oldest geologic structure in Figure 9.17?
Question 17
Which letter represents an unconformity in Figure 9.17?
Question 18
Which letter represents a fault in Figure 9.17?
Question 19
What is the proper order of geologic structures B, C, D, and F in Figure 9.17 from oldest
to youngest?
Question 20
What relative dating principle states that in a sequence of sedimentary rocks, unless
overturned, the oldest beds are at the bottom and the youngest beds are at the top?
Question 21
What relative dating principle states that fossils in a sequence of sedimentary rock layers succeed one another in a definite, recognizable order?
Question 22
The Principle of Cross-cutting Relationships states that .
Question 23
The Principle of Lateral Continuity states .
Question 24
What type of unconformity appears between two parallel sedimentary layers?
Question 25
What type of unconformity appears between a sedimentary layer and an igneous or
metamorphic rock body?
Question 26
What type of unconformity appears between a tilted sedimentary strata and a horizontal overlying layer?
Question 27
If a sample of radioactive material contains a parent isotope with a half-life of 3 years, then at the end of 6 years .
Question 28
Questions 28 and 29 are based on the Lab Exercise, Step 1. 1.
Record your answers to Lab Exercise, Step 1, Questions 1 through 9. List each of the geologic features shown in Figure 9.12 from youngest to oldest. (Write the letter only, NOT the name of the geologic feature.)
Question 29
Record your answer to Lab Exercise, Step 1, Question 10. What letters represents unconformities, and what type of unconformities are they?
Question 30
is the preserved remains or traces of a once-living organism.