Chapter 7 and 8 quiz

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Louisiana Technical College *

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Geology

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Dec 6, 2023

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Chapter 7 and 8 quiz Which of the following is not a geological era? Paleozoic not answer Phanerozoic Proterozoic Archean – not answer Which of the following is not a geological era? Paleozoic not answer Phanerozoic Mesozoic not answer Cenozoic – not answer which of the following statements accurately describes geological time? The Phanerozoic eon represents 90% of Earth’s history – not answer We are most familiar with the Mesozoic eon because most of the organisms that we share earth with evolved at various times during the Mesozoic eon The Phanerozoic eon is divided into three eras Each geological period is divided into multiple eons – not answer Which of the following statements does not accurately describe geological time? The current epoch is known as the Miocene Which of the following is not a main factor that controls metamorphic processes? The temperature at which sedimentary rock formed

Which statement below does not apply to metamorphic rocks? Metamorphic rocks are typically formed deep beneath other rocks where they are subjected to higher temperatures and pressures – not answer Metamorphic rocks typically have a different texture than their parent rock – not answer Metamorphic rocks typically have the same overall chemical composition as their parent rock Metamorphism typically results from the burial of igneous rocks, but does not form sedimentary rocks Which of the following statements does not accurately describe geological time? The current epoch is known as the Miocene Parent rock – The rock that exists before metamorphism Dendrochronology - A method for dating geological materials using tree rings Paleomagnetism - A method for dating geological materials using the magnetic field of rocks Index fossils - A fossil of an organism that lived for a relatively short time period that is particularly useful for dating rocks Magnetic Chronology - A fossil of an organism for which the members of the species have distinguishing features. Not answer A fossil of an organism that lived for a relatively short time period that is particularly useful for dating rocks

A method for dating geological materials using tree rings A method for dating geological materials using the magnetic field of rocks – great answer Biozone Fossil - A fossil of an organism for which the members of the species have distinguishing features Law of superposition - The idea that young sedimentary rocks form on top of older ones Principle of faunal succession - The concept that specific types of organisms lived during different time intervals Parent rock - The rock that exists before metamorphism starts Metamorphism - The change that takes place within a body of rock as a result of it being subjected to conditions that are different from those in which it formed angular unconformity 2 - a boundary between two sequences of sedimentary rocks where the underlying ones have been eroded prior to the deposition of the younger ones Para conformity 4 - a time gap in a sequence of sedimentary rocks that does not show up as an angular unconformity or a disconformity nonconformity 1 - a boundary between non-sedimentary rocks (below) and sedimentary rocks (above) Disconformity 3 - A boundary between two sequences of sedimentary rocks where the underlying ones have been eroded (but not tilted) prior to the deposition of the younger ones Unconformity - An interruption in the process of deposition of sedimentary rocks

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