what is the contour interval for the figure below?

Horizontal View the full answer. Practice questions on Topographic Maps, 5. An excerpt from a contour map is shown below. The distance between these areas is ~1.6 miles (measured along the curving distance of the non-magnified stream). (2 pts) What is the relief on this map? CONTOUR/SPACING= Sets spacing for contour labels; default spacing is 5". 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. What is the benchmark elevation at Sloans Crossing? Note: if you are unable to read the contours on the map, view the original map on the web or look at the large printed copy in the lab. 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). Observe the stream on the Omaha N, Nebraska-Iowa quadrangle. The contour interval is 20'. 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 Lets assume, 7000 and 7100 and calculate the interval between it. These circular patterns indicate hilltops, like in the diagram below (Figure 3.6). 3. If oceanic and continental crust collided, based on their densities the __________ crust would sink below the ________crust. Among other things, a topographic map can be used to measure the average slope On which date did a flood event have a recurrence interval of 0.5? 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). 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. An incredible app, hundreds of features for every kind of math, and the best part is that it shows u what to do on each step and it explains each step, and, very little ads. What important discovery did the researcher miss? Contour lines Table of Contents and lab manual chapter pdf files for download, Overview of Canadian Geology and Mineral and Energy Resources, 4. A topographic map is a precise, graphic representation of the three-dimensional shape of the earth's surface. A contour interval in surveying is the vertical distance or the difference in the elevation between the two contour lines in a topographical map. 1 What is the contour interval on this map? Zoom out and examine the area, what other type of boundary is nearby? CONTOUR/SIGDIG= Sets the number of digits after the decimal point for contour labels; default is 2. Flood stage, or bankfull stage, on Sweetwater Creek occurs at a discharge of ~4,500 cfs. The word contour comes from French, and it is defined as meaning the "outline" of a subject, it often defines a form or an. 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. They also show some features made by people such as brodges. the boundary follows the course of the river at the time it was drawn, the river has since moved. According to your best fit line, what is the recurrence interval of such a discharge? Considering the size of the area to be mapped, contour intervals are assumed. The direction of plate movement in the last 1.1 million years. The commonly used contour interval is 20 feet for a 1:24,000 map scale. What is the area of the slab? Map Example Legal. . 2. (3 pts) Based on the scale chosen for you for the topography (vertical axis), calculate the amount of vertical exaggeration on the topographic profile you constructed for question 4. For the following exercises, please refer to British Columbia Topographic Map 092G095 of the Mount Garibaldi area in southern BC. If the counter interval is 10 feet, which hill (a,b,c) when viewed from the base is 40 feet tall? Description. It is impossible to determine which location is higher. What is the contour interval of the Figure 9 map (shown at the bottom of the page)? Dont forget to add a contour line to the map legend! What factors control the course of this river? Contour lines that are very close together indicate a steep slope. When she treated such a mixture with EDTA, everything dissociated to 30S30 \mathrm{~S}30S and 50s50 \mathrm{~s}50s particles. Indicators themselves are weak acids or weak bases. If you were standing at the washington monument what direction would you need to walk to get to the U.S. capitol building? Locate the state boundary between Nebraska and Iowa along the Missouri River. Contour Mark Figure 7-E9 with a line to indicate the distance you used in your calculation. They are usually mapped with small contour intervals. Salmon River This map is a geologic map of glacial geology in the area, drawn What are the different types of handrails used in bridges? What is the latitude on the northern edge of this rectangle? Line 1 starts with the contour interval, not the projection point. What is the term for the geologic feature called Carter Lake? On a topographic map, a contour line is a line that depicts ground elevation or depression. Why does the boundary depart from the river channel? (1 pt) Contour intervals located on this map are few and far between. Refer to Problem 14.1 for guidance. Expert Answer. 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. What direction is the North American plate moving in comparison to the Pacific Plate at this location? Compare the contour intervals from the Royal Gorge, Colorado map (map 5.1) to the Omaha N, Nebraska-Iowa map. Write your answer in feet. Look closely at the topography south of highway, and it changes abruptly. According to the geothermal gradient, rocks at 500 degrees Celsius will be buried how deep? be found. What is the relief (difference in elevation) between Little Tomah Lake and the top of Tomah Mountain (look for "Tomah Mtn")? (The benchmarks have an "x" to locate the spot where the elevation was surveyed). characteristics of contour lines: 1. Contour lines never cross. 300 A. Lighter contour lines do not have elevations, but can be determined by counting interval. Usually there are different contour intervals for the different maps. Extra Practice Question on Topographic Maps, Overview of Geological Structures Part 1: Strike, Dip, and Structural Cross-Sections, Exercises on Geological Structures Part 1: Strike, Dip, and Structural Cross-Sections, Overview of Geological Structures Part 2: Folds, Faults, and Unconformities, Exercises on Geological Structures Part 2: Folds, Faults, and Unconformities, 6. vertical scales on your topographic profile are not the same. indicate what information is contained on a topographic map, and where it can There are fossils such as Glossopteris and Lystrosaurus that are found in rocks in South America and Africa that indicate they were part of Pangaea approximately 200 million years ago. If you go from the river at (36 05 35.38 N 113 14 43.70 W) Straight up north the canyon rim This makes reading the map easier. Transcribed image text: Refer to the hydrologic map in Figure 14.5. Then add 1 to 5 that becomes 6. the final step is the quotient of the difference between 2 index lines (step 2) and the number of lines in between two index lines plus 1 (step 5). example. You want to have the y-axis of the graph paper represent the elevations of the contour lines that intersect your drawn line (line A-B in this case). b. backward or by clicking on the arrows above and below the eye in the upper V shaped. 31W. A higher contour interval is used for a large area and small contour interval for small area. A low relief. Use the index contour just above the "m" in Temple Canyon for your initial spot. The other side is covered with a layer of fiberglass 2.5cm2.5 \mathrm{~cm}2.5cm thick. They also show elevation. Locations A and B are at the same elevation. What is the dc collector resistance? The river in this area has a rather particular pattern, what geologic process caused this? In this case, to find out the intermediate points elevation, contour intervals are used. To use the same interval for both x and y , specify xyinterval as a two-element vector of the form [min max]. This plate boundary isn't as simple as the previous examples, meaning another nearby plate boundary directly influences it. Intervals involvinq the tonal centre, and their directions of movement -1 1 0 0 0 -1 0 1 0 0 -9 0 0 0 -8 1 0 0 -7 0 0 0 -6 . Which of the three proposed plate tectonic mechanisms would NOT occur at this location? Determining At 2900 Km the S wave velocity falls to 0. At what depth will the dry mantle rock at point X begin to melt if it is uplifted closer to Earth's surface and its temperature remains the same? available from: Open Geosciences. Question 20. A topographic map may or may not include shaded relief to help visualize steep slopes. which means that every place between the marked 6800 foot line and the next The column and row indices of Z are the x and y coordinates in the plane, respectively. Index contours are bold or thicker lines that appear at every fifth contour line. 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? along a line drawn through a portion of a topographic map. Geology Labs 1-6 (some questions and answers, Applications and Investigations In Earth Science, Dennis G. Tasa, Edward J. Tarbuck, Frederick K. Lutgens, Chapter 42: The Physician's Office Laboratory. 9. It is thought to have formed by the runoff of either precipitation or groundwater. Find Sloans Crossing. The figure above illustrates various topographic features. For small contour interval, the money required will also more as the field and office work will be more. Examine the path of the river that feeds into and flows out of Quail Lake. map. Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. Topographic Why? Is the school likely to be at risk of contamination from this same leak? 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? Put simply, contour lines mark points of equal elevation on a map. The Contour Interval of the above map us 20 Units. What would happen to the mantle rock at point X if water is added to it? 18. You can figure out the elevation of The Zone from 0-20 km represents the earths? What features would you expect to occur at this type of boundary? This is a critical skill to prepare students to learn about more complex geologic maps. Use the topographic map (Fig. For the plotting of region, the contour intervals are presumed. (a) Suggest what the 100S100 \mathrm{~S}100S and 130S130 \mathrm{~S}130S particles might represent, in light of current knowledge of protein synthesis. submergence and deposition of sedimentary layers 10-13. based on the assemblage of organisms (A-I) in this sample, what is the age of this rock. The contour line is a line which defines the outline of an object. Step 4. Hint: draw a simple map or a rough cross-section sketch to help illustrate your logic. Using a contour interval of 40 m, label the elevation of every contour line on the map below. If you were standing in the middle on the intermost contour line hill "c", your elevation would be. A simple diagram is shown below on the left. Control of the body is accomplished by which of the following body systems? The Grand Canyon is an extraordinarily steep area. . b. Figure 2 is based on a more complicated landscape that I contoured using a dark pen at a 10 m contour interval and using a lighter pen at a 5 m contour interval. When connecting the points on your graph paper in the area between the two hills in Figure 3.6, you again want to round out the area to represent the base of your valley between the hills, but be careful not to make the valley floor too deep, as according to the topographic map the elevation is below 40ft, but not as low as 30ft. nervous system and circulatory system endocrine and repertory system circulatory and respiratory systems nervous system and endocrine systems . 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 . For example, if your map scale is 1 inch = 50 ft, then one inch on your graphs y-axis should only represent 50ft of elevation. 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. (1 pt) Garibaldi Creek is located east of Deadmans Lake (Figure 7-E8). In the above figure, the dark lines with reading are index contour lines. Please draw he contour line of the given figure below using 1-meter interval and its index contour and Base on the contour lines that you draw in item no.24, what kind of topographic landform is represented? 12. Start climbing from the foot of a hill toward the top, this is called a rising slope (see Fig. lowest line (which is 6760 feet, and not marked) has an elevation equal or greater This means every point on a contour line has the same altitude as that of the assumed intersecting surface. 10,500-10000=500 feet Between these two contour lines if we count, there are 10 counter lines. The zone from 5100-6400 represents the Earth's ? 30 seconds. 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. 40 feet. Would this be an easy location to maintain a railroad? Its Calculation, Uses and When it is Required, Factors Affecting the Selection of Contour Interval. Contour lines are used to show elevation on a topographic map. So contour interval = 790 m-780 m=10 m. For further query, add a comment. It is usually shown in or near the map's legend. How does the direction of motion of the Pacific Plate during the last 1.1 million years differ from direction of movement between 4.7 and 7.2 million years ago? Contours make it possible to show the height and shape of mountains, the depths of the ocean bottom, and the steepness of slopes. 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? Now difference between 7100 and 7000 is 7100 7000 = 100. The number of lines obtained in the above step is taken and added with 1. 14. General Learn more about how Pressbooks supports open publishing practices. (in feet) between the two points. How far did the pole move? What Is Contour Interval? Log in to TheConstructor to ask questions, answer peoples questions, write articles & connect with other people. Contour lines that are far apart show what type of slope? Practice Questions on Geological Structures, 7. LAB EXERCISE 9.4 Rules for Reading Contour Li, LAB EXERCISE 9.3 Understanding Stream Behavio, LAB EXERCISE 11.2 The Logic of Locating Earth, EXERCISE 9.4: Determining Elevations From Top, LAB EXERCISE 2.10 - Estimating the Amount and, LAB EXERCISE 2.13 - Why Are There More Earthq, LAB EXERCISE 6.9 - Gaining Insight into Depos, EXERCISE 2.1 - Recognizing Plates and Plate B, Chapter 2: Understanding and treating mental, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. These circular patterns indicate hilltops, like in the diagram below (Figure 3.6). View Source. What does a contour interval mean - A contour interval is a vertical distance or the difference in the elevation between the two contour lines in a. . What is the straight line distance between the 8996 b and the 7202 b benchmarks located north and northwest of Phelps Lake? It will take approx. What does this type of drainage pattern indicate about the area? Vertical exaggeration is the effect that is created when the horizontal and Please give your answer in grams/milliliter. within the sequence is a distinctive clay layer that under closer inspection is fine grained volcanic ash. 1. All contour lines are spaced at a 20 m contour interval. Widely separated contour lines indicate a gentle slope. f. Connect the Possible contours include 500', 520', 540', 560', 580', 600', 620', etc. A contour line is a line drawn on a topographic map to indicate ground elevation or depression. Measure the horizontal map distance between points A and B to get the vertical ground distance. Lay a strip The height of an object above the surface of the sea. Index contours are bold or thicker lines that appear at every fifth contour line. The numbers are the elevation at the top of the peak. Is Lake Creek flowing into or out of Phelps Lake? 10. Of the following dated flood events, which one would you expect to happen more often? 9.4) to estimate the elevation of this point as accurately as possible. the result from the nearest marked contour line. How is the top of a mountain shown on a topographic map? The map has a contour interval of forty feet, - Table 8 . Write your estimates for the elevation at each waypoint next to the waypoint. Why is mass so important to a stars life? the profile line. Step 3. which isotopic system should they use. The figure above illustrates a depression and its representation using contour lines. Index contours are bold or thicker lines that appear at every fifth contour line. Course Hero uses AI to attempt to automatically extract content from documents to surface to you and others so you can study better, e.g., in search results, to enrich docs, and more. Then, find the difference in elevation between the two points. 3. A topographic profile along the A - A' line is shown correctly in: What is the longitude for the northwest corner of the map? Locations A and B are at the same elevation. What does each contour line on a map show? Divide the current maximum elevation of the Big Island by the rate you calculated in the previous question. the entire earth to a city block (or less). At 500 degrees Celsius, rocks will be buried to about _______ km depth. Search for the "Washington Monument" and zoom into 3000 feet eye altitude. The Wadati-Benioff zone is associated with which type of plate boundary? What type of drainage pattern is present in this area? Each dot represents an elevation number, spaced evenly at 100 m in the horizontal. For consistency, assume that elevations between contour lines are 1/2 a contour interval higher than elevation of the lower line. Now count the number of non-index lines contour lines between the 2 index contour lines selected for the contour interval calculating in the 1st step. USask GEOL 121 Lab Final Exam Overview. A contour interval is the vertical distance or difference in elevation between contour lines. Contour line art is a method of drawing where you draw only the outline of an object, without any shading. A map has index contours at 250m, 500m, and. TAs names: _______________ _______________. lines enclose smaller and smaller areas. a geologist is trying to date a sequence of sedimentary rocks with abundant fossils and sandstones. Use a contour interval of 4 inches. Now look farther south of Sloans Crossing at Hwy. as sinkholes, underlying soluble rock was dissolved and area collapsed. What bearing would you need to walk to go to the Smithsonian from the monument? What type of process is going on at this location? Once your contour lines are drawn, you will notice that you had to draw some lines closer together in some areas and wider apart in other areasand that you may have even enclosed an area by drawing a contour line in a circular pattern. 0.5 in 24,000 in/in = 12,000 in If the counter interval is 10 feet, which hill (a,b,c) when viewed from the base is 40 feet tall? Step 3. Select the The. Does your topographic profile show any peaks or valleys? Write your answer in feet. Earthwork estimations for any type of structure like bridges, dams or roads can be found out with the help of contour intervals in a map. Sorry, you do not have permission to ask a question, You must log in to ask a question. It is impossible to determine which location is higher. Trees growing in denser stands experience more competition for essential resources, which can make them more vulnerable to disturbances. Examine unconformities 1 and 2 indicated in Figure 1.9. The small contour interval, the survey work and plotting have to be more accurate. Approximately how far did the pole move per day? Expert Answer. MATLAB automatically selects the contour lines to display. Join now! Suppose that (x,y,z)=i+k\nabla \varphi(x, y, z)=\mathbf{i}+\mathbf{k}(x,y,z)=i+k. 1 ft = 24,000 ft, and 24,000 ft x (\(\frac{1\;km}{3280\;ft}\)) = 7.32 km. As you can see contour lines with 10 m interval. Low gradient and abundant sediment supply. It is determined as follows: Let's take an example of two contour lines which are labelled. Using the surrounding contour lines, what is the approximate elevation of Deadmans Lake? 50m. Please refer to this Saskatoon topographic map to complete the next three questions. These features you are seeing are linear valleys. Assume that water flowed through these valleys at some time. What type of tectonic plates are present? A contour interval in surveying is the vertical distance or the difference in the elevation between the two contour lines in a topographical map. First, we must identify the two contours that lie on either side of "P." In some cases the contours that we need are clearly labeled; however, in other instances, you will need to use the contour interval (1,000 feet, in this case) to "count" up or down from a labeled contour. contour lines, the steeper the slope. a) Label the elevation of every contour line on the map. The contour interval is determined by the scale of the map and the degree of relief of the terrain being represented. (b) Why do you think reassociation to 1005 and 130 S particles did not work? The number of contour lines in-between 7000 and 7100 are 4. Inspect the P wave velocities. Contour Lines fault. If the numbers associated with the contour lines are decreasing, there is a decrease in elevation. For Ex: If the number of lines between 2 index lines are 5. (1 pt) How much higher is Mount Price than Garibaldi Lake? On most topographic maps, If the arrow is pointing toward the contour lines around your location, your location is a higher elevation than the index contour line. Vertical 68 and south of the Edmonson County Line. o drainage ' divide or watershed boundary 1000 ft -::-:: Contour interval 50 Feet Figure 12.5 Flow lines across a topographic surface. When the contour interval is not specified in the map, it can be calculated as explained in the following sections. Overview section 7.3 provides background information on contour lines to prepare you for these exercises. long-term time-average of sea level). At 75 km depth, rocks will be heated to about _______ degrees Celsius. D) Nothing. Generally, there are totally distinct contour intervals for various maps. which of the above geologic events is the seventh in the sequence? Australia and Antarctica separated after the break-up of Pangaea. exaggeration: a stream or river and dividing the distance (in miles) into the vertical difference Consideration in making the choice of the proper contour interval . To show information. Figure 7 . Given that this portion of the Australian plate moves at a speed of 2.2 inches per year, how old are the snake fossils? Mark During the flood event of 9/23/2009, the discharge measured at this gaging station was 21,200 cfs. a. amacrine cells b. photoreceptors c. bipolar cells d. retinal ganglion cells, In Figure 1.8, which of the following rock layers is. Q. 60 seconds. Therefore: Rise = change in elevation = top (Point A elevation) minus bottom (Point B . elevation of each index contour line. Considering the above map, the steps involved in contour interval calculation are. Large contour interval is to be used if the time available for the survey work is less. Observe the velocities of waves on the graph. (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? Question 14. In what general direction is the Pacific Plate moving? Write your answer in feet. To keep the contour map simple and easy to read, not every contour line is marked with its elevation reading. Axons from which neuron in the retina make up the optic nerve? Contour lines that are close together show what type of slope? Adjacent means next to. Sharp contour points indicate pointed ridges. For example, if you wanted to do a contour line drawing of a pear, you'd simply draw the outline of the pear, add a stem, and stop there. Show your work! Show that the streamlines of \nabla \varphi are orthogonal to the level surfaces of \varphi. What type of bedrock is present in this area? All Rights Reserved. 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. Locate Little Sinking Creek in the southern portion of the map, north of Hwy. Lost your password? hillslope: It is south of Mammoth Cave. (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. Provided is a topographic map of a hill with contour lines drawn showing elevation in meters. The desired unit is feet. Creating 2. Write your answer in feet. What is Contour Interval? Sometimes vertical exaggeration is desiredbut, in some cases, you may not want it. For 1:25 000 scale maps the interval between contours is usually 5 metres, although in mountainous regions it may be 10 metres. contour (X,Y,Z) specifies the x and y coordinates for the values . Using a contour interval of 40 m, label the elevation of every contour line on the map below. Considering the size of the area to be mapped, contour intervals are assumed. If the map has 40-foot contour intervals, then Point A is located at 3,000 feet, and Point B is located at 2,840 feet. The vertical distance or difference in elevation between contour lines is known as a contour interval. All melodies have contours. B. above or below it, multiplying by the contour interval, and adding or subtracting Thus, ais 520'; bis 540'. Orbiting spacecraft contain internal gyroscopes that are used to control their orientation. a stream. Measure the distance using the bar scale between the pole 1400 and 1700 (locations C and F). The terms below Country Now calculate the difference between the two-selected index contour line selected from a map. Show your work below. Likewise the "40" contour connects depths of 40 ft below sea level and so on. with the elevation of the contour it represents. Where do the S wave velocities abruptly change? What is the relief between the surface of East Musquash Lake and the intersection between U.S. Route 1 and Maine Route 6 in Topsfield? (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). See the example under CONTOUR/SPACING below. Consider the ages and positions of the islands listed above along with what you know about plate tectonics and hotspots. Are streams in this area downcutting or laterally eroding? Join TheConstructor to ask questions, answer questions, write articles, and connect with other people. The purpose of this lab is to familiarize students with how to read and use topographic maps. What is the elevation of the base of the monument in meters? The result is expressed in feet per mile (ft./mi.). terrance williams, felipe santos,

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what is the contour interval for the figure below?

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