From the contour map, a profile can be drawn of the terrain. in the southern portion of the map, the area is underlain by limestone. Learn more about how Pressbooks supports open publishing practices. The contour interval is determined by the scale of the map and the degree of relief of the terrain being represented. USask GEOL 121 Lab Final Exam Overview. How is the top of a mountain shown on a topographic map? Topographic The desired unit is feet. Location A is higher. In every map, on the right-hand bottom side, the contour interval is specified. 2009-2021 The Constructor. What is the approximate map relief? (5 pts) The following topographic map (Map 7-E3) is from a coastal area and features an interesting geological hazard in addition to the ocean. They are usually mapped with small contour intervals. 19. The lowest contour line is at 200m. If the relief is high (bigger change) you will need a bigger contour interval. How far have the snake fossils moved apart since they were originally deposited? slope percent = rise/run 100. e. Is the elevation of waypoint A > or < waypoint B? Lighter contour lines do not have elevations, but can be determined by counting Join now! the result from the nearest marked contour line. "Contour" actually means "outline" in French, which is where the name comes from. The highest point on a topographic map is marked as 345m. Contour lines rules: 1. Large contour interval is to be used if the time available for the survey work is less. Find Sloans Crossing. Joyce McBeth; Karla Panchuk; Tim Prokopiuk; Lyndsay Hauber; and Sean Lacey, 1.3 GEOLOGY & RESOURCE MAPS FOR CANADIAN PROVINCES & TERRITORIES, 1-E1 LAB EXERCISES CANADIAN GEOLOGY & MINERAL AND ENERGY RESOURCES, 1-E2 LAB EXERCISES REGIONAL GEOLOGY & MINERAL AND ENERGY RESOURCES, 2-E1 LAB EXERCISES MINERAL IDENTIFICATION, 3.5 IGNEOUS ROCK FORMATIONINTRUSIVE VS. EXTRUSIVE, 3.6 LAB EXERCISES IGNEOUS ROCK IDENTIFICATION, 4-E1 LAB EXERCISES SEDIMENTARY ROCK IDENTIFICATION, 5.4 LAB EXERCISES METAMORPHIC ROCK IDENTIFICATION, 6.7 LAB EXERCISE CHOOSING ABSOLUTE DATING METHODS, Answers to Practice Lab Exercises in section 7-E1, 8.6 GEOLOGIC STRUCTURES CREATED BY PLASTIC & BRITTLE DEFORMATION, 8-E5 EXERCISES COMPLEX GEOLOGICAL MAPS & CROSS-SECTIONS, 9-E1 LAB EXERCISE LOCATING AN EPICENTER, 9-E3 LAB EXERCISE HISTORICAL EARTHQUAKE, 10.3 STREAM GRADIENT AND THE CYCLE OF STREAM EROSION, Introductory Physical Geology Laboratory Manual First Canadian Edition (v.3 Jan 2020), https://pub.data.gov.bc.ca/datasets/177864/pdf/092G/092G095.pdf, Next: Extra Practice Question on Topographic Maps, Introductory Physical Geology Laboratory Manual First Canadian Edition (v.3 - Jan 2020), Creative Commons Attribution-ShareAlike 4.0 International License. At 500 degrees Celsius, rocks will be buried to about _______ km depth. fcontour (f) plots the contour lines of the function z = f (x,y) for constant levels of z over the default interval [-5 5] for x and y. fcontour (f,xyinterval) plots over the specified interval. Note: The intervals are increasing, therefore, the contours indicate a hill. It is south of Mammoth Cave. It is usually every fifth line that indicates a change in elevation. What is the straight line distance between the 8996 b and the 7202 b benchmarks located north and northwest of Phelps Lake? At the point where 2 contour lines would cross would have 2 different elevations which is impossible. The steepest path on a topographic Surface is always perpendicmar to topographic contour at the point where the flowline crosses the contour. Locate Little Sinking Creek in the southern portion of the map, north of Hwy. Clear up mathematic tasks. How far did the pole move? View Source. Which gas station is the most likely source of the gasoline leak? Index contours are prominent or dense lines that bob up at every 5th isometric line. Location B is higher. Explain why. Mark Figure 7-E9 with a line to indicate the distance you used in your calculation. On which date did a flood event have a recurrence interval of 0.5? For this computation, the rise, or vertical ground distance, and run, or horizontal ground distance, are needed. hillslope: Index contours are bold or thicker lines that appear at every fifth contour line. Put simply, contour lines mark points of equal elevation on a map. On most topographic maps, Write your answer in feet. In Figure 1.9, which of the following geologic structures is. 1 What is the contour interval on this map? What type of plate tectonic boundary is present? What type of drainage pattern would this area represent? For consistency, assume that elevations between contour lines are 1/2 a contour interval higher than elevation of the lower line. Why does the boundary depart from the river channel? Example Calculation of Contour Intervals: Factors Affecting Durability of Fiber Reinforced Concrete (FRC), Measuring Tape: Anatomy, Marking, and Steps to Measure, Tacheometric Surveying: Principle, Procedure, and Advantages, Types of Foundation for Buildings and their Uses [PDF], Compressive Strength of Concrete -Cube Test [PDF], Procedure, Results, 16 Types of Heavy Equipment Used in Construction, Calculate Quantities of Materials for Concrete -Cement, Sand, Aggregates, Methods of Rainwater Harvesting [PDF]: Components, Transportation, and Storage, Exploring the Impact of Construction Robots on the Industry, How to Maintain a Brick Chimney for Maximum Efficiency, A Shining Future: The Benefits of Solar Energy, What You Should Know Before Installing Mud Flooring. 7. A darker, heavier contour line that is labeled with an elevation. Refer to the topographic map in Figure 7-E3 for an example of contour lines you can use to help you complete this question. which isotopic system should they use. On this map, what is the change in elevation between two adjacent index contour lines? Map Which of the following places represent a Wadati-Benioff zone? D 009 -800 N O a) 10 b) 20 D -600 -800 N a) 10 Ob) 20 c) 40 d) 50 Which point (A,B,C, D) has an elevation of 344 feet? do not cross each other, divide or split. (1 pt) Garibaldi Creek is located east of Deadmans Lake (Figure 7-E8). In the context of evolution through natural selection, explain why multicellular organisms have specialized exchange systems and surfaces. Based on your answer to question 6 which of the following statements about the break-up of Pangaea is TRUE? A profile may be constructed What type of tectonic plates are present? Closely spaced characteristics of contour lines: 1. distance is found on the scale. Would you expect the gradient of the Missouri River in Nebraska to be greater or less than the gradient that you calculated for the Grape River in Colorado? The result is expressed in feet per mile (ft./mi.). The even spacing indicates the hill has a uniform slope. Lets assume, 7000 and 7100 and calculate the interval between it. - Table 8 . A contour interval is a vertical distance or difference in elevation between contour lines. Determine the elevation at Point A and Point B in the Figure 9 map below. What is the longitude for the Washington Monument, locate the base of the monument. USask GEOL 121 Rock & Mineral Quiz Information, 8. which of the above geologic events is the seventh in the sequence? 8. A slope is the rise or fall of the land surface. On our map, point "P" lies between 3000 feet and 4000 feet contours . For example, the first hill on the left has a top contour line of 50ft. Therefore the topographic profile in Figure 3.6 represents a profile of the map surface (along the A-B line) that has been vertically exaggerated by 10 times (10X). What factors control the course of this river? . Assume value is an integer variable. How far is that distance (0.56 miles) in Kms? The column and row indices of Z are the x and y coordinates in the plane, respectively. To show different features of Earth's surface. Please give your answer in grams/milliliter. far apart represent gentle slopes. Write your answer in feet. For producing a detailed study of C. Submergence and deposition of sedimentary layers 10-13. b. 2. 50m. Step 1. Search for the "Washington Monument" and zoom into 3000 feet eye altitude. What is the change in elevation across each contour interval (i.e., between successive "regular" contours) on this map? Keeping the abrupt topography change in mind, which of the following is true? Definition of Contour: A contour or a contour line may be defined as the line of intersection of a level surface with the surface of ground. A contour is a line drawn on a map that joins points of equal height above sea level. What is the contour interval? Forests across much of the United States are becoming denser. How far (in Km) did the pole move in one year during this time period? In the early days of ribosome research, before the exact role of ribosomes was clear, a researcher made the following observation. The word contour comes from French, and it is defined as meaning the "outline" of a subject, it often defines a form or an. Closer distance indicates steep slope and wider distance gentle slope. In Figure 9.4, what is the elevation of Malcome Bog? Contour plots with Excel and Matplotlib Select the XYZ data arranged as a single range (Range I4:N8 in the data screenshot below). 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The number of contour lines in-between 7000 and 7100 are 4. Where does it wind up? The contour interval is 20 meters ( Figure 10-2 ), thus each one of the intermediate contour lines crossed to get to point (a) adds 20 meters to the 500-meter index contour line. Use the slope percent equation and solve. Therefore: Rise = change in elevation = top (Point A elevation) minus bottom (Point B . map. If you were to walk the path of a contour line in real life, you would remain at the same elevation the whole hike, never traveling up or down. Do Pole movements seem to be steady every 100 years or variable? Now draw contour lines on your map to represent the pyramid in three-dimensions on your map. Chapter 3 Topographic Maps by Karen Tefend and Bradley Deline, CC BY-SA 4.0. Why are colors and symbols used on topographic maps? located below the scale. What shape are the contour lines that cross a valley or stream? What type of drainage pattern is present in this area? In which zone do the P wave velocities appear to be steadily increasing? Considering the size of the area to be mapped, contour intervals are assumed. If the arrow is pointing toward the contour lines around your location, your location is a higher elevation than the index contour line. The height of an object above the surface of the sea. Topographic Why? So contour interval = 790 m-780 m=10 m. For further query, add a comment. refers to height in feet, or meters, above sea level). Notice the general shape of this feature. It is a plane section of the three-dimensional graph of the function f parallel to the-plane. During the flood event of 9/23/2009, the discharge measured at this gaging station was 21,200 cfs. For the plotting of region, the contour intervals are presumed. For 1:25 000 scale maps the interval between contours is usually 5 metres, although in mountainous regions it may be 10 metres. fault. Given that San Francisco is located on the North American Plate and Los Angles is located on the Pacific Plate, are these two cities getting closer together or farther apart over time? If the river on this map is 1.93 miles long, what is the gradient for this river? (1 pt) Examining your map, you will see there is a black line that outlines a rectangle that takes up most of the map area. Be sure to only plot those elevations that are at the intersection of the contour line with line A-B. contour (Z) creates a contour plot containing the isolines of matrix Z, where Z contains height values on the x - y plane. A thumbnail version of the map is shown in Figure 7-E10, a larger copy is provided at the back of this lab manual, and your TA will provide you with a full-scale version of the map in lab. Given that this portion of the Australian plate moves at a speed of 2.2 inches per year, how old are the snake fossils? Based on the drainage pattern type, does the bedrock underlying this area consist of rocks uniformly resistant to erosion or rocks alternating between resistant and non-resistant layers? tops of peaks, and some are marked with xs with numbers next to them. 9. tilting. be found. A topographic profile along the A - A' line is shown correctly in: What is the longitude for the northwest corner of the map? What do close contour lines represent on a map? Would the recurrence interval for this flood plot at: Is it possible that a flood with a similar discharge to that of the event from 9/23/2009 could happen again in the next 20 years? Is the school likely to be at risk of contamination from this same leak? on a map that are produced from connecting points of equal elevation (elevation Widely separated contour lines indicate a gentle slope. Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. What type of tectonic plates are present? a) Label the elevation of every contour line on the map. 15. Country Essentially a topographic profile is a side image of a topographic map, but the image is only a representation of the area shown on the line on the topographic map (line A-B on Figure 3.6). Contour lines make a v pattern as they cross streams and rivers, and the v always points towards the upstream direction. The equation used is: Tips Join TheConstructor to ask questions, answer questions, write articles, and connect with other people. What is Contour Interval? Considering the above map, the steps involved in contour interval calculation are. The Contour Interval of the above map us 20 Units. Note: This lab is in colour. In Figure 9.4, what is the elevation of the highest point on Hunt Ridge (keep in mind step #4 from the first question)? To calculate this divide the distance (in centimeters) between the two islands by the difference in their ages, Examine the headings of the measurements that you took for the previous two questions. Go back to the location in Google Earth that you examined for question 36 (46 55 25.66 N 152 01 25.17 E). By using a ruler, you can transfer these elevation points from your topographic map straight down onto your graph paper such as shown in Figure 3.6. Flood stage, or bankfull stage, on Sweetwater Creek occurs at a discharge of ~4,500 cfs. 3. What would cause two separate samples of pure water to have slightly different pH\mathrm{pH}pH values? 300 A. A contour interval is the vertical distance or difference in elevation between contour lines. Figure 4: Reading Contour Maps . According to the geothermal gradient, rocks buried 75 km beneath the surface would normally be at what temperature? A map has index contours at 250m, 500m, and. Measure the distance using the bar scale between the pole 1400 and 1700 (locations C and F). When you join you get additional benefits. Using a contour interval of 40 m, label the elevation of every contour line on the map below. Where do the P waves abruptly change? Using the contour lines, determine the upstream direction of the creek. Introductory Physical Geology Laboratory Manual First Canadian Edition (v.3 - Jan 2020) by Joyce McBeth; Karla Panchuk; Tim Prokopiuk; Lyndsay Hauber; and Sean Lacey is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License, except where otherwise noted. Adjacent means next to. All melodies have contours. In which stage of the cycle of stream erosion is this area? 31. which Geologic Law did you use to come to the conclusion you made in the previous question (figure 1.8)? For all of the following figures, assume north is at the top of the map, and south at the bottom. a. Contour intervals must be obeyed, therefore the contour line elevations can only be multiples of the contour interval . The following are general characteristics of contour lines: 1. contour (X,Y,Z) specifies the x and y coordinates for the values . Each contour line shows a different elevation. lines enclose smaller and smaller areas. How far did the pole move in meters in one year during this time period? On a topographic map, a contour line is a line that depicts ground elevation or depression. If the counter interval is 10 feet, which hill (a,b,c) when viewed from the base is 40 feet tall? The map has a contour interval of forty feet, As contour intervals are for the calculation of vertical elevation of an area, same way to calculate the horizontal distance it is termed as Horizontal Equivalent. a landform it is necessary to construct a topographic profile or cross-section Index contours are bold or thicker lines that appear at every fifth contour line. The difference between two adjacent contours is called the contour interval, which is 10 ft for the Figure 2-2 example. (2 pts) What is the gradient between Garibaldi Lake and Mount Price? Write out the longitude for each designated point as was done for Point A Write out the longitude for each designated point as was done for Point A A: Longitudes for the given points are explanied below within the sequence is a distinctive clay layer that under closer inspection is fine grained volcanic ash. (2 pts) What is the relief on this map? To construct a profile, you need graph paper, a ruler, and a pencil. Suppose that (x,y,z)=i+k\nabla \varphi(x, y, z)=\mathbf{i}+\mathbf{k}(x,y,z)=i+k. the "V" points to the area of higher elevation or upstream. The horizontal map distance measures 0.5 inches. Sensor stability as characterized through mean absolute differences (MARD) on every study day including only sensors inserted on study day 1. Note: elevation is metres above sea level; thus, sea level = ______ m. 2. (1 pt) Find Deadmans Lake (it is located close to Cheakamus River and south of Daisy Lake; refer to Figure 7-E8 which is a close up from the map area). Q. First Edition. Terms and conditions apply. Therefore, if you print it out in black and white please refer back to the electronic copy to avoid confusion. When a large area is to be mapped in small piece of paper contour intervals are used. Gradient: Stream gradient can also be determined from a topographic 10. Consider the ages and positions of the islands listed above along with what you know about plate tectonics and hotspots. Step 3. maps also have a vertical scale to allow the determination of a point in three Follow the creek along its path. Answers: 1 Show answers Another question on Biology. Contour Lines (b) Notice how a mountain saddle, a ridge, a stream, a steep area, and a flat area are shown with contour lines.
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