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Examining the Terrestrial Planets (Chapter GEOLOGY 306 Laboratory NAME: Instructor: TERRY J. BOROUGHS Examining the Terrestrial Planets (Chapter 21) For this assignment you will require: a calculator, colored pencils, a metric ruler, and your geology 305 textbook as a reference. Objectives for chapter 20: After you have completed this exercise, you should be able to: 1. List and describe the geologic processes that have shaped the landforms of the terrestrial planets; 2. Give an example of a feature on Earth or the Moon produced by each of the geologic processes that have shaped the landforms of the terrestrial planets; 3. List the primary geologic processes that have shaped the landforms of each of the terrestrial planets; 4. Describe the procedure for determining the relative ages of a planet’s surface features. The following questions refer to Chapter 21 in your manual, 9th edition) (Read the questions from your manual and place your answers in the following spaces provided.) 1. Identify the geologic processes that modified the landscapes of the Earth and the Moon depicted in the following figures and/or photographs. The processes involve include the following: Volcanism, Tectonism (evidence of plate tectonics), Gradation (leveling of the surface due to erosion and deposition), and Impact Cratering. Identify the geologic processes that modified these Figures and/or photographs surfaces and/or landscapes (use Volcanism, Tectonism, Gradation, or Impact cratering Fig. 21.1 A & B Fig. 21.2 Fig. 21.3 & 21.4 Fig. 21.5 Fig. 21.6 A Smooth, dark areas of central figure in Fig. 21.6 2. Indicate the agent of gradation and/or specific process (if known) that is responsible for the feature the following figures: Identify the agent of gradation and/or specific process (if Figures and/or photographs known) that is responsible for the feature Inside the crater of Fig. 21.6 A Fig. 21.3 Fig. 21.4 3. Impact craters and volcanoes can both have craters. One has its crater rim along the ground’s surface, whereas the other has its crater up atop a cone. The crater rim for an impact site is typically located: The crater rim for a volcano is typically located: Instructor: Ms. Terry J. Boroughs 1 4. Meteor Crater, Figure 21.5, has a diameter of approximately 1,200 meters. It is estimated that the object that produced it was about 50 meters across. How may times greater is the size of the crater than the object that produced it? Such a small object can produce such a large crater due to (high velocity, high momentum, high mass, or a combination of all of these.) (Pick the best answer.) 5. Despite being one of the best-preserved and youngest impact craters on Earth, Meteor Crater, Figure 21.5, shows signs or erosion. Do you see signs of weathering and erosion in the form of dry stream channels cutting through the rim of the crater, or debris from rock falls and/or rock slides at the base of the crater walls, or do you see a combination of both? 6. Which Lunar feature (figure 21.6 a, b, c, or d) most resembles Meteor Crater? 8. How are the surfaces of Mercury and the Moon similar? (What do they have in common?) 9. Figure 21.7A shows a close-up view of a portion of Mercury’s surface. It is similar to certain features found on the Moon. Which figure of the Moon (Figure 21.6 A, B, C, or D) shows a feature similar to figure 21.7A? (Pick the best answer.) 10. Figure 21.7B shows a close-up view of a portion of Mercury’s surface. It is similar to certain features found on the Moon. Which figure of the Moon (Figure 21.6 A, B, C, or D) shows a feature similar to figure 21.7B? (Pick the best answer.) 11. Of the four processes that alter a planet’s surface, which one the most effective on Mercury? (In other words, which process is readily visible or common on the surface of Mercury?) 12. Why does Mercury show little evidence of erosion due to running water, wind, or ice? 13. Choosing from the processes that act on a planet’s surface, (volcanism, tectonism, gradation, impact cratering) write the name of the process that is most likely responsible for the features in the following figures on Mercury. Be specific, for example, Gradation – wind vs. Gradation – ice. • Figure 21.7 A: • Figure 21.7 D (flat areas in lower left or upper right corner, also on the inside of 21.7B): Instructor: Ms. Terry J. Boroughs 2 14. Using these images of Mercury, figure 21.7C notice the trace of a cliff-like structure that has offset more than 1.6 kilometers (1 mile). Which of the four major geologic processes (volcanism, impact cratering, gradation, or tectonism) created this structure? (Pick the best answer.) 15. Using the full-disk image of Venus and the smaller images in Figure 21.8, do you see any of the following processes (volcanism, impact cratering, gradation, or tectonism) evident on the surface of Venus? Tectonism in the form of fracturing or faulting (yes or no): Volcanism (yes or no): Impact cratering (yes or no): Gradation (yes or no): If yes, what type(s)? 16. Choosing from the processes that act on a planet’s surface, (volcanism, tectonism, gradation, impact cratering) write the name of the process that is most likely responsible for the following features (volcanism, impact cratering, gradation, or tectonism) evident on the surface of Venus? • Figure 21.8 A: • Figure 21.8 B: • Figure 21.8 C: • Figure 21.8 D: 17. In radar images, smooth surfaces appear darker, and rough, multi-faceted surfaces appear bright. These differences are not due to compositional differences like seen on the Moon, but instead due to the effects of weathering, erosion, etc. Do you think that the smooth surfaces are (Older or younger?) Pick one. Do you think that the rough surfaces are (Older or younger?) Pick one. 18. The gradational agent responsible for the feature in Figure 21.9 D is: 19. A. Is the central feature in Figure 21.8 C younger or older than the surrounding landscape? B. What type of structure is this feature? A. B. 20. The bright areas on the central global view of Venus (figure 21.8) show highly fractured ridges and canyons of the Aphrodite highlands. What geologic process produced these features: (volcanism, tectonic activity, gradation, or impact cratering)? (Pick the best answer.) Instructor: Ms. Terry J. Boroughs 3 21. Approximately 1000 impact craters have been identified on the surface of Venus. Do think this is (more or less) than the number on the surface of Mercury? 22. Identify the geologic processes that modified the landscapes of Mars depicted in the following figures and/or photographs. The processes involve include the following: Volcanism, Tectonism (evidence of plate tectonics), Gradation (leveling of the surface due to erosion and deposition), and Impact Cratering. Identify the geologic processes that modified these Figures and/or photographs surfaces and/or landscapes (use Volcanism, Tectonism, Gradation, or Impact cratering Fig. 21.9 A Fig. 21.9 B Fig. 21.9 C Fig. 20.9 E (8th ed.) or Figure 21.9 D (9th ed.) 23. Using the full-disk and the smaller images of Mars in or figure 20.9, do you see any of the following processes (volcanism, impact cratering, gradation, or tectonism) evident on the surface of Mars? Tectonism in the form of fracturing or faulting (yes or no): Volcanism (yes or no): Impact cratering (yes or no): Gradation (yes or no): If yes, what type(s)? 24. How does the Martian surface compare to the surfaces of Mercury and the Moon in regards to crater density (the number of craters in a given area)? Does Mars have more or fewer craters than Mercury? 25. Choosing from the gradational processes that act on the surface of Mars, write the name of the process that is most likely responsible for the features in the following figures. Be specific, for example, Gradation – wind vs. Gradation – ice. • Figure 21.9 A: • Figure 20.9 E (8th edition) or 21.9 D (9th edition): 26. The long linear feature near the center of the full-disk image of Mars is Valles Marineris, a large canyon system. Do you think Valles Marineris is (larger or smaller) than the Grand Canyon located in the U.S. (Pick the best answer.) 27. Do you think that Valles Marineris may have formed from tectonic activity? Do you think this tectonic activity is currently active? | Instructor: Ms. Terry J. Boroughs 4 28. Because the subsurface of some regions on Mars contains abundant ice, impacts often generate ejecta with a mud-like consistency. Do you think the impact crater shown in figure 21.9 B exhibits this type of ejecta pattern? (yes or no) 29. Using Figure 21.9 C, Olympus Mons is one of four huge volcanoes in a region called Tharsis. Compare the surface of Olympus Mons to the surface of Mercury and the lighter regions of the Moon. Is the surface of Olympus Mons geologically (young, old, or about the same age) as the surfaces of Mercury and the lighter regions of the Moon? (Pick the best answer.) 30. Using Figure 21.6 Describe the origin and/or characteristics of the Lunar Maria and Lunar Highlands. Highlands: Maria: 31. Rocks brought back from the lunar Maria during the Apollo landings are about 3.2 - 3.8 billion years old. Therefore, are the lunar highlands (older or younger) than 3.2 - 3.8 billion years.
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