3. Bedrock from which entire geologic time period is missing between rock units 5 and 6? The fault most likely occurred after
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1 Homework # 4 Relative Dating Name: Section: Date: 1. The cross section below represents a portion of Earth s crust. Letters through D are locations within the rock units. 5. The sequence of rock types found in the walls of the Grand anyon are shown. The names of rock formations are shown and the upper and lower boundaries of each formation are indicated by dashed lines. The rock layers have not been overturned. t which location is quartzite most likely found?... D. D The sequence of rock layers in the cross section provides evidence that the Muave formation is. younger than the Temple utte, but older than the right ngel 2. ase your answer(s) to the following question(s) on the geologic cross section below, which shows rock units 1 through 7 that have not been overturned. Some of the rock units contain New York State index fossils. n unconformity exists between rock units 5 and 6.. younger than both the Temple utte and the right ngel. older than the Temple utte, but younger than the right ngel D. older than both the Temple utte and the right ngel Key asalt Volcanic ash ontact metamorphism What evidence shown in the cross section indicates that the basalt rock unit is the youngest rock unit? 6. The geologic cross section below shows bedrock layers through D. Line XY is a fault. 3. edrock from which entire geologic time period is missing between rock units 5 and 6? The fault most likely occurred after. all bedrock layers were formed 4. Identify one metamorphic rock that could have been formed by the contact metamorphism within rock unit 1.. layer formed, but before layer D formed. layer formed, but before layer formed D. layer formed, but before layer formed page 1
2 7. ase your answer(s) to the following question(s) on the cross section below. Rock units are labeled 1 through 8. The line between and indicates an unconformity. 10. The cross section of the bedrock layers of a canyon is represented below. Letters and represent rock layers on the sides of the canyon. Layer can best be correlated to layer by comparing the. sediments on each side of the stream Which event occurred sometime after the formation of the unconformity?. formation of rock unit 3. sequence of rock layers on each side of the canyon. organisms currently living in rock layers and D. rate of erosion of rock layers and by the stream. tilting of rock unit 5. deposition of the sediments that formed rock unit 8 D. intrusion of rock unit 7 8. Which characteristic of the granite intrusion provides the most evidence that it solidified deep underground? 11. ase your answer(s) to the following question(s) on the block diagram below, which shows bedrock units through F and boundary XX.. very hard. coarse texture. light color D. felsic composition 9. Earth has sedimentary bedrock of marine origin that is four billion years old. Which inference can be made from this information?. Earth had oceans four billion years ago.. Sedimentary rocks formed from magma when Earth cooled four billion years ago.. Most sedimentary rocks are at least four billion years old. The rock that formed in the contact metamorphic zone between rock unit E and rock unit D is. hornfels. marble. schist D. anthracite coal D. Life existed on Earth four billion years ago. Section: page 2 Homework # 4 Relative Dating
3 12. ase your answer(s) to the following question(s) on the geologic cross section of bedrock shown below. through G identify rock layers and Q represents a fault. Lines W, X, Y, and Z are locations of unconformities. The rocks have not been overturned. 16. ase your answer(s) to the following question(s) on the geologic cross section below. Location is within the metamorphic rock. Which rock is the youngest?. shale. sandstone. igneous rock D. rock at location Which rock or feature is oldest?. rock. rock G. fault Q D. unconformity Z 17. ase your answer(s) to the following question(s) on the cross section below and on your knowledge of Earth science. The cross section represents rock units that have not been overturned. Lines and GG represent unconformities. The geologic ages of some of the lettered rock units are shown below the cross section. 13. The movement of bedrock along fault Q most probably produced. gaps in the rock record. an earthquake. a volcanic lava flow D. zones of contact metamorphism 14. The unconformities shown in the cross section represent. buried erosional surfaces The diagrams below represent three index fossils found in one of the rock units.. locations of index fossils. volcanic ash deposits D. boundaries between oceanic and continental crust These fossils are most likely found in 15. Identify two processes that produced the unconformity.. rock unit I. rock unit J. rock unit K D. rock unit M Section: page 3 Homework # 4 Relative Dating
4 18. ase your answer(s) to the following question(s) on the geologic cross section below in which overturning has not occurred. Letters through H represent rock layers. 21. The cross section below represents four different rock units. The symbol for contact metamorphism has been omitted from the cross section. Which two letters represent bedrock of the same age?. and E. and D. F and G D. D and H The sequence below represents the relative ages of the rock units from oldest to youngest. limestone granite shale sandstone Which cross section below represents where the symbol for contact metamorphism would be located, based on the relative age sequence?. 19. The diagram below represents three bedrock outcrops. The layers have not been overturned. Letters through E identify different rock layers. Fossils found in the rock layers are shown.. Which fossil could be classified as an index fossil?.... D. D. 20. Which scientific principle states that younger rock layers are generally deposited on top of older rock layers? a. superposition b. evolution c. original horizontality d. includsion Section: page 4 Homework # 4 Relative Dating
5 Problem-ttic format version c Educide Software Licensed for use by Wanda Vargas Terms of Use at 1. Section: Homework # 4 Relative Dating 09/28/ asalt cuts across all other rock units. / ontact metamorphism is shown between the basalt and all rock layers Ordovician Period. marble or hornfels D D 20. a. 21.
B) color B) Sediment must be compacted and cemented before it can change to sedimentary rock. D) igneous, metamorphic, and sedimentary rocks
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