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1. What index fossils from Figure 8.9 are present? 2. Based on the overlap of range zones for these index fossils what is the relative age of the rock (expressed as the early, middle, or late part of one or more periods of time)? 3. Using Figure 8.9, what is the absolute age of the rock in Ma (millions of years old/ago), as a range from oldest to youngest?

1. What index fossils from Figure 8.9 are present? 2. Based on the overlap of range zones for these index fossils what is the relative age of the rock (expressed as the early, middle, or late part of one or more periods of time)? 3. Using Figure 8.9, what is the absolute age of the rock in Ma (millions of years old/ago), as a range from oldest to youngest?

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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A. Analyze this fossiliferous rock from New York. 1. What index fossils from Figure 8.9 are present? 2. Based on the overlap of range zones for these index fossils what is the relative age of the rock (expressed as the early, middle, or late part of one or more periods of time)? 3. Using Figure 8.9, what is the absolute age of the rock in Ma (millions of years old/ago), as a range from oldest to youngest? B. Analyze this fossiliferous rock from Ohio. 1. What index fossils from Figure 8.9 are present? 2. Based on the overlap of range zones for these index fossils, what is the relative age of the rock (expressed as the early, middle, or late part of one or more periods of time)? 3. Using Figure 8.9, what is the absolute age of the rock in Ma (millions of years old/ago), as a range from oldest to youngest? C. Analyze this fossiliferous sand from Delaware. 1. What index fossils from Figure 8.9 are present? 2. Based on the overlap of range zones for these index fossils what is the relative age of the rock (expressed as the early, middle, or late part of one or more periods of time)? 3. Using Figure 8.9, what is the absolute age of the rock in Ma (millions of years old/ago), as a range from oldest to youngest? C X1 D. Using Figure 8.9, re-evaluate the geologic cross section in Figure 8.2 based on its fossils. 1. Which one the contacts (surfaces) between lette layers is a disconformity? . 2. A system is the rock/sediment deposited during a period of time. What system(s) of rock is/are completely missing at the disconformity? 3. What amount of absolute time in m.y. (millions of years) is missing at the disconformity? m.y. E. What geologic event occurred during the Mesozoic Era in the region where Figure 8.3 is located? Explain.
Transcribed Image Text:A. Analyze this fossiliferous rock from New York. 1. What index fossils from Figure 8.9 are present? 2. Based on the overlap of range zones for these index fossils what is the relative age of the rock (expressed as the early, middle, or late part of one or more periods of time)? 3. Using Figure 8.9, what is the absolute age of the rock in Ma (millions of years old/ago), as a range from oldest to youngest? B. Analyze this fossiliferous rock from Ohio. 1. What index fossils from Figure 8.9 are present? 2. Based on the overlap of range zones for these index fossils, what is the relative age of the rock (expressed as the early, middle, or late part of one or more periods of time)? 3. Using Figure 8.9, what is the absolute age of the rock in Ma (millions of years old/ago), as a range from oldest to youngest? C. Analyze this fossiliferous sand from Delaware. 1. What index fossils from Figure 8.9 are present? 2. Based on the overlap of range zones for these index fossils what is the relative age of the rock (expressed as the early, middle, or late part of one or more periods of time)? 3. Using Figure 8.9, what is the absolute age of the rock in Ma (millions of years old/ago), as a range from oldest to youngest? C X1 D. Using Figure 8.9, re-evaluate the geologic cross section in Figure 8.2 based on its fossils. 1. Which one the contacts (surfaces) between lette layers is a disconformity? . 2. A system is the rock/sediment deposited during a period of time. What system(s) of rock is/are completely missing at the disconformity? 3. What amount of absolute time in m.y. (millions of years) is missing at the disconformity? m.y. E. What geologic event occurred during the Mesozoic Era in the region where Figure 8.3 is located? Explain.
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