Chapter11_21 copy - Chapter 11 Name: _ Date: _ 1. A) B) C)...

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Chapter 11 Name: __________________________ Date: _____________ 1. The best index fossils are _____. A) swimming/floating organisms that evolved rapidly B) land-dwelling organisms that breed well C) river-dwelling organisms that never evolved D) swimming organisms that evolved slowly 2. The first two epochs of the Tertiary Period were the _____. A) Oligocene and Miocene B) Paleocene and Eocene C) Pliocene and Pleistocene D) Eocene and Oligocene 3. 238 U decays to _____. A) 232 Th B) 207 Pb C) 206 Pb D) 235 U 4. The type of unconformity in which strata overlie gneisses and granites is called a _____. A) nonconformity B) angular unconformity C) disconformity D) time-break 5. A mineral used in 238 U and 235 U dating is _____. A) K-feldspar B) zircon C) biotite D) hornblende 6. If an isotope's half-life is 100,000 years, how many half-lives would it take to reduce the original concentration of the parent isotope to one-quarter of its original value? A) 1 B) 2 C) 3 D) 4 Page 1
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7. The ____ are distinctive index fossils in rocks of Cretaceous age. A) dinosaurs B) ammonites C) trilobites D) fish 8. The most recent period of reversed magnetic polarity was during the ___ Chron. A) Gauss B) Matuyama C) Brunhes D) Gilbert 9. Eons are subdivided into _____. A) systems B) periods C) epochs D) eras 10. The effective dating range of 232 Th is ____ billion to 10 million years. A) 1.6 B) 2.6 C) 3.6 D) 4.6 11. The Quaternary Period includes the ____ epochs. A) Pliocene and Miocene B) Paleocene and Eocene C) Oligocene and Miocene D) Pleistocene and Holocene 12. The Phanerozoic Eon is subdivided into the _____. A) Hadean and Archean B) Archean and Proterozoic C) Paleozoic, Mesozoic and Cenozoic D) Holocene and Pleistocene Page 2
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13. The determination of equivalence in time-stratigraphic age of strata is termed _____. A) similarity B) relation C) comparison D) correlation 14. An irregular surface of erosion between parallel strata is termed a _____. A) disconformity B) nonconformity C) strata break D) time break 15. The time for 50% of the parent atoms of a radioactive isotope to decay to the daughter isotope is the _____. A) age B) decay time C) atomic number D) half-life 16. The Mesozoic Era includes the _____ periods. A) Cambrian, Ordovician and Silurian B) Triassic, Jurassic and Cretaceous C) Devonian, Mississippian and Pennsylvanian D) Permian, Triassic and Jurassic 17. Where strata of an older sequence are tilted and their eroded edges are overlain by younger strata, one has a(n) _____. A) disconformity B) discontinuity C) angular unconformity D) nonconformity 18. The dinosaurs dominated during the _____ Era. A) Paleozoic B) Mesozoic C) Cenozoic D) Pleistocene Page 3
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19. The smallest interval of geologic time is a(n) _____.
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This note was uploaded on 07/01/2010 for the course GLY 2010 taught by Professor Defant during the Fall '08 term at University of South Florida - Tampa.

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Chapter11_21 copy - Chapter 11 Name: _ Date: _ 1. A) B) C)...

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