Adjacent means next to. Given that this portion of Pangaea broke apart 200,000,000 years ago, calculate how fast South America and Africa are Refer to the figure below and assume contour interval of 10 feet. 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. Lines: Contour lines are used to determine elevations and are lines 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. The figure above illustrates various topographic features. 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 . Expert Answer. Practice Questions on Geological Structures, 7. located below the scale. Why? 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? Please enter your email address. Contour plots with Excel and Matplotlib Select the XYZ data arranged as a single range (Range I4:N8 in the data screenshot below). Information which Geologic Law did you use to come to the conclusion you made in the previous question? Likewise the "40" contour connects depths of 40 ft below sea level and so on. Transcribed image text: Set up the cancellation table so all units will cancel, except the desired unit, feet. First Edition. 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. What would happen to the mantle rock at point X if water is added to it? (1 pt) What is the ratio scale of this map? Is the church likely to be at risk of contamination from this same leak? When the contour interval is not specified in the map, it can be calculated as explained in the following sections. fault. C. Submergence and deposition of sedimentary layers 10-13. A mountaineer is planning an expedition. The number of lines obtained in the above step is taken and added with 1. (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. tops of peaks, and some are marked with xs with numbers next to them. A darker, heavier contour line that is labeled with an elevation. 9. (1 pt) Contour intervals located on this map are few and far between. Contour which Geologic Law did you use to come to the conclusion you made in the previous question (figure 1.8)? In Figure 9.7, what is the elevation of the lowest point in the crater? 2. Math can be challenging, but with a little practice, it can be easy to clear up math tasks. If oceanic and continental crust collided, based on their densities the __________ crust would sink below the ________crust. Use the index contour just above the "m" in Temple Canyon for your initial spot. All contour lines are spaced at a 20 m contour interval. Describe how you decided on an estimated elevation for points A and E. c. Is the elevation of waypoint A > (greater than) or < (less than) waypoint E? Once your points are plotted on the graph paper, you simply connect the dots. These same fossils can be found in Australia, which indicates it, along with Antarctica, was also part of Pangaea at that time. Start climbing from the foot of a hill toward the top, this is called a rising slope (see Fig. When the vertical dimension of your graph is different from the horizontal dimension on your map, you may end up with a graph that shows a vertical exaggerationand the features of the Earth represented by your topographic profile may be deformed such as in Figure 3.7. How is the top of a mountain shown on a topographic map? 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. 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? 300 A. Search for the "Washington Monument" and zoom into 3000 feet eye altitude. Step 4. The peak is normally considered to be located at half the interval distance. Figure 6.13 | Coastal area topographic map. 15. When we hold a ruler to the y-axis of the topographic profile in Figure 3.6, we see that 0.5 inches = 50ft, which means 1 inch = 100ft on the vertical scale. What is the gradient? CONTOUR/SIGDIG= Sets the number of digits after the decimal point for contour labels; default is 2. 11. Line 1 starts with the contour interval, not the projection point. Stream Contour interval: The change in elevation from one contour line to the next is always the same within the same map.Many maps have either a 40- or 80-foot contour interval: An 80-foot interval simply means that each contour line is 80 vertical feet away from . A rounded contour indicates a flatter or wider drainage or spur. Considering the above map, the steps involved in contour interval calculation are. Lay a strip Sharp contour points indicate pointed ridges. points. Please use Occams razor as you answer the questions: use the simplest explanation rather than the most complicated explanation to answer the question. Determining This page titled 3.6: Drawing Contour Lines and Topographic Profiles is shared under a CC BY-SA license and was authored, remixed, and/or curated by Deline, Harris & Tefend (GALILEO Open Learning Materials) . of paper along a line across the area where the profile is to be constructed. Using a contour interval of 40 m, label the elevation of every contour line on the map below. Lost your password? Examine the path of the river that feeds into and flows out of Quail Lake. Contour lines that are far apart show what type of slope? You are tasked with creating your own coastal topographic map, so you hike around a coastal area with a GPS receiver (Global Positioning System) and every so often you record your position along with the elevation in metres at that point, which results in the map below (Map 7-E5). On most topographic maps, Lakes/Ponds. Write your estimates for the elevation at each waypoint next to the waypoint. The river in this area has a rather particular pattern, what geologic process caused this? Why is this so? Convergent (Continent-Ocean or Ocean-Ocean). (2 pts) What is the relief on this map? In what general direction is the Pacific Plate moving? interval. In the early days of ribosome research, before the exact role of ribosomes was clear, a researcher made the following observation. Why would a smaller ratio scale be used for this map in comparison to the Garibaldi map? MATLAB automatically selects the contour lines to display. (b) Why do you think reassociation to 1005 and 130 S particles did not work? Map Example 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. Examine unconformities 1 and 2 indicated in Figure 1.9. For small scale maps covering a wide area of varying terrain, For rough topographical map meant for initial assessment only, If a detailed map is to be prepared for execution work, If the ground has large variation in levels, for instance, hills and ponds, No measurement or scaling is required since the contour levels are indicated on the contour lines, The distance must be measured on the map and converted to actual distance by multiplying with the scale of the map, In a given map the contour interval is a constant, The horizontal equivalent varies with slope. What is the tolerance for compression test results of concrete, according to the standards? 1. the "V" points to the area of higher elevation or upstream. d. Is the elevation of waypoint D > or < waypoint C? Based on the map below, which location has a greater elevation, A or B? In the context of evolution through natural selection, explain why multicellular organisms have specialized exchange systems and surfaces. If you trace the length of a line with your finger, each point you touch is the same height above sea level. What is the contour interval of the Figure 9 map (shown at the bottom of the page)? What is the relief of the area in the map? The contour line is a line which defines the outline of an object. Now draw contour lines on your map to represent the pyramid in three-dimensions on your map. CONTOUR/SPACING= Sets spacing for contour labels; default spacing is 5". Topographic A contour line is a line drawn on a topographic map to indicate ground elevation or depression. 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. Contour values are in feet. For the plotting of region, the contour intervals are presumed. What can be said about level surfaces of \varphi? What type of drainage does this appear to be? above or below it, multiplying by the contour interval, and adding or subtracting Scale (contour interval): All maps have a horizontal scale. An excerpt from a contour map is shown below. See example under CONTOUR/SPACING below. Closely spaced Measure the gradient to the index contour past the word Creek (the last contour before it reaches Arkansas River). Are the rocks likely tilted and folded or horizontal? For Ex: If the number of lines between 2 index lines are 5. When she treated such a mixture with EDTA, everything dissociated to 30S30 \mathrm{~S}30S and 50s50 \mathrm{~s}50s particles. Contour lines do not cross each other, divide or split. 2. 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. The following are general 31W. What type of tectonic plates are present? A profile may be constructed 3. slope percent = rise/run 100 Measure the distance, using bar scale, between the pole in 1400 and 1500 (locations C and D). Provided is a topographic map of a hill with contour lines drawn showing elevation in meters. dimensional space. the profile line. Refer to the figure below. First, subtract the lower number from the higher number and then divide the result by the number of contour lines. he areas enclosed by contour lines at 5 m interval for a reservoir upto the face of the proposed dam are as shown below value of Contour lines 100,510l0,1015,1020,1025,1030,1035 Area (m2) 653/2 ,653, 653*2, 653*8, 653*18 ,653*25 , 653*40 Taking 1005m and 1035 m as the bottom most level and the highest water level achievable of the reservoir. 2009-2021 The Constructor. Please hand in this lab to your TAs at the end of the lab period. 2.The contour interval is 0.025 N m 2.The thick black contour is zero. Note where this would plot on your graph. The distance between these areas is ~1.6 miles (measured along the curving distance of the non-magnified stream). 200 feet. He wants to follow the easiest possible path, which means he needs to find the most gentle slope up the mountain. the boundary follows the course of the river at the time it was drawn, the river has since moved. e. Is the elevation of waypoint A > or < waypoint B? Description. a geologist is trying to date a sequence of sedimentary rocks with abundant fossils and sandstones. f. Is the elevation of waypoint C > or < waypoint B? Contour Interval on Topographic Map. 2. for Interpreting Topographic Maps If you were standing at the washington monument what direction would you need to walk to get to the U.S. capitol building? 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. which organism was the most useful in coming to this conclusion (best fossil index), which organism was the least useful in coming to this conclusion (worst index), how much of the parent isotope would be remaining after 7 half lives have passed, if a radiometric element has a half life of 425 yrs, how old would a rock be that only had 3.125% of the parent isotope remaining, based on your graph approximately how much of the parent isotope would be remaining after 3.5 half lives, based on your graph above approximately how many half lives have passed when only 35% of the parent isotope is remaining, an archeologist finds some cloth at a burial site and wants to determine the age of the remains. The vertical distance or difference in elevation between contour lines is known as a contour interval. 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. slope percent = (120ft / 1000ft) 100 = 12% All Rights Reserved. Legal. Considering the size of the area to be mapped, contour intervals are assumed. What is the dc saturation current? with the labeled contour lines at the bottom of the profile paper and project Using the surrounding contour lines, what is the approximate elevation of Deadmans Lake? (1 pt) Mount Price is located next to Garibaldi Lake (just west of Table Bay, Figure 7-E9 above). One side of a copper block 5cm5 \mathrm{~cm}5cm thick is maintained at 250C250^{\circ} \mathrm{C}250C. which of the above geologic events is the seventh in the sequence? In Figure 9.4, what is the elevation of the highest point on Farrow Mountain? Vertical 31. None of these. which of the above geologic events is the second in the sequence, which of the above geologic events is the fifth in the sequence. Index contours are prominent or dense lines that bob up at every 5th isometric line. 8,194,375 years to sink. refers to height in feet, or meters, above sea level). (10 pts) Imagine you are a geologist working for the Geological Survey of Canada. The smallest circles represent the Mark Zoom out and examine the area, what other type of boundary is nearby? 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. each contour to the horizontal line of the same elevation. right hand portion of the window. (1 pt) Garibaldi Creek is located east of Deadmans Lake (Figure 7-E8). How are the tops of hills, mountains or depressions (dips) shown on a topographic map? a. amacrine cells b. photoreceptors c. bipolar cells d. retinal ganglion cells, In Figure 1.8, which of the following rock layers is. 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? The selection of the contour interval is decided by the survey leader before the start of the mapping process depending upon the ground factors. (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 Grand Canyon is an extraordinarily steep area. characteristics of contour lines: 1. within the sequence is a distinctive clay layer that under closer inspection is fine grained volcanic ash. A map has index contours at 250m, 500m, and. Using the speed you calculated in the previous question (and ignoring possible changes in sea level), when will the Big Island of Hawaii sink below the surface of the ocean? The height of an object above the surface of the sea. To construct a profile, you need graph paper, a ruler, and a pencil. In Figure 9.4, what is the elevation of Malcome Bog? What is the elevation of the unlabeled index contour crossing Roaring Creek in the northwest corner of the map? In Figure 9.4, what is the elevation of the highest point on Hunt Ridge (keep in mind step #4 from the first question)? Using the contour lines, determine the upstream direction of the creek. A contour is a line drawn on a map that joins points of equal height above sea level. 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). The map has a contour interval of forty feet, Thus, ais 520'; bis 540'. 400 D. N a) point A 00 D. N a) point A b) point D c) point B d) point A higher contour interval is used for a large area and small contour interval for small area. 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 B. USask GEOL 121 Rock & Mineral Quiz Information, 8. The contour interval is stated on every topographic map and is usually You can find out exactly how steep the Find Sloans Crossing. (in feet) between the two points. In the above figure, the dark lines with reading are index contour lines. 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. please add a brief explanation thank you 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? Note: there is technically more than one correct answer for some of these questions. The highest point on a topographic map is marked as 345m. In most maps, every fifth contour line is an index contour. Contour Lines 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). For small contour interval, the money required will also more as the field and office work will be more. The headings indicate the direction the Pacific Plate is moving over the hot spot. Which one travels faster? Biology, 22.06.2019 02:10. 1) The contour interval between contour is 40m. Notice the general shape of this feature. For 1:25 000 scale maps the interval between contours is usually 5 metres, although in mountainous regions it may be 10 metres. Calculate how fast the Hawaiian Islands are sinking, by using the ages and elevations of Maui and Nihoa. Use a contour interval of 4 inches. Q. Refining interval counts to include these produced Figure 7 and - Table 8, below. Q. 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. To calculate this divide the distance (in centimeters) between the two islands by the difference in their ages. 3. What is the latitude for this monument? If the numbers associated with specific contour lines are increasing, the elevation of the terrain is also increasing. What is the straight line distance between the 8996 b and the 7202 b benchmarks located north and northwest of Phelps Lake? 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? This plate boundary isn't as simple as the previous examples, meaning another nearby plate boundary directly influences it. If the user enters 3.14 in response to the following programming statement, what will be stored in value? As an example, Give the elevation of the highest and lowest contour lines as well as the difference between them. Figure 3. They are usually mapped with small contour intervals. Figure 4: Reading Contour Maps . 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). Figure 2 is the cross section along line AB. What are the different types of handrails used in bridges? What shape are the contour lines that cross a valley or stream? 9.4) to estimate the elevation of this point as accurately as possible. Consider the ages and positions of the islands listed above along with what you know about plate tectonics and hotspots. distance is found on the scale. In Figure 1.9, which of the following geologic structures is. (b) Notice how a mountain saddle, a ridge, a stream, a steep area, and a flat area are shown with contour lines. How contour lines show a pair of small hills Betwe View the full answer Transcribed image text: What is the contour interval for the figure below? Among other things, a topographic map can be used to measure the average slope 3. 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. What is the relationship between the relief of an area and the contour interval on a map of he area? On this map, what is the change in elevation between two adjacent index contour lines? If the topographic map in Figure 3.6 has a fractional scale of 1:12,000 then 1 inch is equal to 12,000 inches or 1000ft; this 1inch = 1000ft equivalency is for the horizontal scale. In this case, to find out the intermediate points elevation, contour intervals are used. 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? 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. maps also have a vertical scale to allow the determination of a point in three Australia and Antarctica separated after the break-up of Pangaea. Is the school likely to be at risk of contamination from this same leak? The small contour interval, the survey work and plotting have to be more accurate. A contour interval in surveying is the vertical distance or the difference in the elevation between the two contour lines in a topographical map.