(b) Notice how a mountain saddle, a ridge, a stream, a steep area, and a flat area are shown with contour lines. Note: This lab is in colour. They also show some features made by people such as brodges. C. scale on profile paper by labeling the horizontal lines corresponding to the Chapter 3 Topographic Maps by Karen Tefend and Bradley Deline, CC BY-SA 4.0. unit_3_lab_ch.odt - Question 1 (4 points) The river in this figure is The shaded areas indicate the 95% confidence intervals. The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. D) Nothing. Locate the state boundary between Nebraska and Iowa along the Missouri River. What is the relief (difference in elevation) between Little Tomah Lake and the top of Tomah Mountain (look for "Tomah Mtn")? Now look farther south of Sloans Crossing at Hwy. The direction system is useful but imprecise. Controls the size of characters in the contour labels; default is 0.08". Contours make it possible to show the height and shape of mountains, the depths of the ocean bottom, and the steepness of slopes. Approximately how far did the pole move per day? (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. the boundary follows the course of the river at the time it was drawn, the river has since moved. 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. As an example, Considering the map, the following steps are used to calculate the contour intervals calculation as follows . It is impossible to determine which location is higher. What is the area of the slab? Please refer to this Saskatoon topographic map to complete the next three questions. Answer: B. Lay a strip Apply the principle of conservation of angular momentum to determine the direction a spacecraft will rotate if an internal gyroscope begins to rotate in the counterclockwise direction. Contour Lines: Contour lines are used to determine elevations and are lines on a map that are produced from connecting points of equal elevation (elevation refers to height in feet, or meters, above sea level). You can find out exactly how steep the This may be easier to determine by examining the tributaries to the main stream. Was Carter Lake cut off before or after the state boundary between Nebraska and Iowa was drawn? The calculation of the contour intervals is as below: Firstly locate 2 index contour lines that are labeled with a specific elevation. Control of the body is accomplished by which of the following body systems? each contour to the horizontal line of the same elevation. As a contour approaches a stream, canyon, or drainage area, the contour lines turn upstream. The equation used is: Tips In what direction was the main river flowing? 60 seconds. Contour Notice the general shape of this feature. An excerpt from a contour map is shown below. Figure 4: Reading Contour Maps . What type of plate tectonic boundary is present? Please give your answer in grams/milliliter. Examine unconformities 1 and 2 indicated in Figure 1.9. Each contour line shows a different elevation. Betwe View the full answer Transcribed image text: What is the contour interval for the figure below? (2 pts) How would the gradient change if you measured from the peak of Guard Mountain (on the east side of the lake, across from Mount Price) to Garibaldi Lake? This plate boundary isn't as simple as the previous examples, meaning another nearby plate boundary directly influences it. Measure the distance, using bar scale, between the pole in 1400 and 1500 (locations C and D). Remember, because of isostasy the denser plate will be lower than the less dense plate. The speed the islands are sinking can be estimated by measuring the difference in elevation between two islands and dividing by the difference in their ages (this method assumes the islands were a similar size when they were active). To avoid having your profile distorted so that it accurately conveys what the surface of the Earth really looks like in profile, you will want both the vertical and horizontal scales to match. For small contour interval, the money required will also more as the field and office work will be more. Observe the velocities of waves on the graph. The figure above illustrates various topographic features. Considering the above map, the steps involved in contour interval calculation are. How contour lines show a pair of small hills What is the latitude for this monument? A standard topographic map uses contour linesto express elevations above sea level and show the shape of the land. than 6760 feet, but less than 6800 feet. The image to the left shows a perspective view of a river mouth at the head of a valley between a steep cliff (to the left) and a smoother slope (to the right). The intervals +4tt and 4tt, then, respectively showed intervals ascending and descending from the tonal centre. Measure in centimeters the distance (Map Length) between the two points you recorded in the previous question. Vertical The elevation at sea level is zero meters. 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. FM3-25.26 Chptr 10 ELEVATION AND RELIEF - GlobalSecurity.org 31. A contour interval is a vertical distance or a difference in elevation between contour lines in a topographic map, index contour lines are bold or thick lines that appear on every fifth contour line and if the number associated with specific contour lines is increasing, the elevation of the area is also increasing. a stream or river and dividing the distance (in miles) into the vertical difference It is usually shown in or near the map's legend. What is the relationship between the relief of an area and the contour interval on a map of he area? Lets assume, 7000 and 7100 and calculate the interval between it. 9.4) to estimate the elevation of this point as accurately as possible. What type of process is going on at this location? separating in cm/year? Calculate the stream gradient of Grape Creek in ft/mile. If the relief is high (bigger change) you will need a bigger contour interval. (1 pt) Garibaldi Creek is located east of Deadmans Lake (Figure 7-E8). If you were standing in the middle on the intermost contour line hill "c", your elevation would be. 500/10=50 Dont forget to add a contour line to the map legend! Digitized contour lines, elevation points and water-courses A thumbnail version of the map is shown in Figure 7-E7,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. 3. the result from the nearest marked contour line. 1. Lakes/Ponds. PDF 2-1. BATHYMETRIC CHARTS - UMass D For producing a detailed study of As a rule, hilltops will be slightly rounded to show a slight increase in elevation to represent the crest of the hill, but be careful not to draw the hilltoptoo high on your graph paper. d. Prepare a vertical 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. Melodic contour is the shape and sequence of movements of a melodic line. In every map, on the right-hand bottom side, the contour interval is specified. (1 pt) Contour intervals located on this map are few and far between. What does this type of drainage pattern indicate about the area? A contour interval in surveying is the vertical distance or the difference in the elevation between the two contour lines in a topographical map. The headings indicate the direction the Pacific Plate is moving over the hot spot. Q-What is the contour interval for the topographic map shown below?Ans-Contour interval is the vertical distance between two adjacent contour lines on . The following are general characteristics of contour lines: 1. British Columbia Topographic Map 092G095. Please enter your email address. Write your answer in feet. The peak is normally considered to be located at half the interval distance. d. Is the elevation of waypoint D > or < waypoint C? (5 pts) 7. Locate the Louisville and Nashville Railroad line just south of Hwy. contour lines, the steeper the slope. 15. Low gradient and abundant sediment supply. Contour Interval: Definaion, Example, Calculations & Uses Use the topographic map (Fig. Here two contour line, side by side are 790 m and 780 m. Between them there is no contour line. USask GEOL 121 Rock & Mineral Quiz Information, 8. 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? which of the above geologic events is the second in the sequence, which of the above geologic events is the fifth in the sequence. To show information. This makes reading the map easier. A contour interval is a vertical distance or the difference in the elevation between the two contour lines in a topographical map. Explain why. Solved What is the contour interval for the figure below? D - Chegg on a topographic map base. The older unconformity is a Nonconformity, while the younger is a Disconformity. Find Sloans Crossing. PDF Laboratory 6: Topographic Maps On this map, what is the change in elevation between two adjacent index contour lines? To keep the contour map simple and easy to read, not every contour line is marked with its elevation reading. (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. USask GEOL 121 Lab Final Exam Overview. of a hill (or hills). slope percent = rise/run 100 Because there isnt a 60ft contour line on this hilltop, we know that the hills highest point (the crest) is some elevation between 50 and 60ft. If the numbers associated with the contour lines are decreasing, there is a decrease in elevation. Calculate the contour interval between index contours, which are are the more prominent, bold-colored lines with the elevation marked on them. 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 which of the above geologic events is the seventh in the sequence? Q. Contour lines tend to enclose the smallest areas on ridge tops, which are often narrow or very limited in spatial extent. 17. Contour values are in feet. Which of the following lakes has a shoreline that is most likely at an elevation between 10,240 and 10,320 feet above sea level? Which of the three proposed plate tectonic mechanisms would NOT occur at this location? None of these. How far have the snake fossils moved apart since they were originally deposited? 225 feet; half the contour interval lower than 250 feet. 5.5 Contour Lines and Intervals | NWCG How fast was the Pacific plate moving from 7.2 million years ago to 4.7 million years ago between the formation of Kauai and Nihoa in cm/year? CONTOUR/SPACING= Sets spacing for contour labels; default spacing is 5". A topographic map is a precise, graphic representation of the three-dimensional shape of the earth's surface. How to Read a Topographic Map | REI Co-op The numbers are the elevation at the top of the peak. What is the contour interval? Answered: Topographic Maps EXERCISE 2 POST-LAB | bartleby Performance Assessment of Three Continuous Glucose Monitoring Systems which Geologic Law did you use to come to the conclusion you made in the previous question? A contour line is a line drawn on a topographic map to indicate ground elevation or depression. When she treated such a mixture with EDTA, everything dissociated to 30S30 \mathrm{~S}30S and 50s50 \mathrm{~s}50s particles. Search for the "Washington Monument" and zoom into 3000 feet eye altitude. Challenging deep learning models with image distortion based on the In the given figure contour interval is 50 feet. available from: Open Geosciences. (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). Refer to the figure below. Usually there are different contour intervals for the different maps. What Is Contour Interval ? : Steps Of Calculating, Characteristics Contour Lines and Intervals Contour lines connect all the points on a map that have the same elevation and therefore reveal the location of hills, mountains, and valleys. If you were standing in the middle on the intermost contour line hill "c", your elevation would be. Reply to Schmittner: Topography affects the ocean circulation but does Determine the height of Mount Price. A person standing at point "F" would only be visible to a person standing at: Examine the figure below. Contour lines are used to show elevation on a topographic map. (in feet) between the two points. Use the appropriate conversion factor to convert the horizontal map distance to horizontal ground distance. What type of tectonic plates are present? c. Label each mark The rock that most closely resembles the composition of continental crust based on the description in the previous section is: Based on the choice you made for question 15, what is the density of the rocks that make up continental crust? Index contours increase by 250. Using the surrounding contour lines, what is the approximate elevation of Deadmans Lake? It is south of Mammoth Cave. In most maps, every fifth contour line is an index contour. Write your answer in feet. Once your points are plotted on the graph paper, you simply connect the dots. Lost your password? 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. Which of the following statements about them is true? A contour line of a function of two variables is a curve along which the function has a constant value, so that the curve joins points of equal value. The circled points indicate days that were at least partially spent at the study side; red circles indicate days with frequent sampling . slope percent = (120ft / 1000ft) 100 = 12% A slope is easy to recognize in a hilly area. Lines or isolines on a map that connect points with the same elevation. Topographic It is important for the farmer or irrigator to identify the slopes on the land. According to the geothermal gradient, rocks buried 75 km beneath the surface would normally be at what temperature? far apart represent gentle slopes. a geologist is trying to date a sequence of sedimentary rocks with abundant fossils and sandstones. What type of drainage does this appear to be? USGS topographic maps also show many other kinds of geographic features including roads, railroads, rivers, streams, lakes, boundaries, place or feature names, mountains, and much more. a view of the landscape as seen from above. The rendition of this topography as an isoline (contour) map from an overhead perspective is shown directly below. This is a critical skill to prepare students to learn about more complex geologic maps. If you examine the graph showing the topographic profile in Figure 3.6, can you imagine what would happen to your profile if we changed the spacing for elevations on the y-axis? Large contour interval is to be used if the time available for the survey work is less. Suppose that (x,y,z)=i+k\nabla \varphi(x, y, z)=\mathbf{i}+\mathbf{k}(x,y,z)=i+k. Every sixth contour line has an index contour, which is a bolder or thicker line. below cuts the mountain at equal intervals of elevation. To illustrate what these hills look like in profile (or, how they would look if you saw them while standing on the ground and looking at them from a distance), you can draw what is known as a topographic profile. 31? Contour lines never cross. 3.6: Drawing Contour Lines and Topographic Profiles The rock that most closely resembles the composition of oceanic crust based on the description in the previous section is: Based on the choice you made for question 17, what is the density of the rocks that make up oceanic crust? Topographic Maps Flashcards | Quizlet Why is mass so important to a stars life? What features would you expect to occur at this type of boundary? with the elevation of the contour it represents. (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. e. Is the elevation of waypoint A > or < waypoint B? Examine the path of the river that feeds into and flows out of Quail Lake. Considering the size of the area to be mapped, contour intervals are assumed. If the counter interval is 10 feet, which hill (a,b,c) when viewed from the base is 40 feet tall?
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