Please hand in this lab to your TAs at the end of the lab period. 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. The selection of the contour interval is decided by the survey leader before the start of the mapping process depending upon the ground factors. To construct a profile, you need graph paper, a ruler, and a pencil. how old is the sequence of rocks. Forests across much of the United States are becoming denser. (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. 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. Contour lines do not cross each other, divide or split. which of the above geologic events is fifth in the sequence. Is Lake Creek flowing into or out of Phelps Lake? Answers: 1 Show answers Another question on Biology. Melodic contour is the shape and sequence of movements of a melodic line. All points on a contour line are at the same elevation. interval. If you were standing at the washington monument what direction would you need to walk to get to the U.S. capitol building? Given that this portion of the Australian plate moves at a speed of 2.2 inches per year, how old are the snake fossils? (b) Why do you think reassociation to 1005 and 130 S particles did not work? Is the church likely to be at risk of contamination from this same leak? 15. Locate the Louisville and Nashville Railroad line just south of Hwy. The. From the contour map, a profile can be drawn of the terrain. To show different features of Earth's surface. 13. Now look farther south of Sloans Crossing at Hwy. Considering the map, the following steps are used to calculate the contour intervals calculation as follows . Locate the state boundary between Nebraska and Iowa along the Missouri River. They then cross the stream and turn back along the opposite bank of the stream forming a "v". Step 3. The calculation of the contour intervals is as below: Firstly locate 2 index contour lines that are labeled with a specific elevation. Contour intervals must be obeyed, therefore the contour line elevations can only be multiples of the contour interval . Considering the size of the area to be mapped, contour intervals are assumed. Are the rocks likely tilted and folded or horizontal? To calculate this divide the distance (in centimeters) between the two islands by the difference in their ages. . The desired unit is feet. First Edition. Explain how you made this decision. Streams/Rivers Escarpments/Cliffs What happens when the lithosphere at point X is heated to 1500 C? up or down from the nearest index contour line and multiplying by the contour What is the relief of the area in the map? Convergent (Continent-Ocean or Ocean-Ocean). Vertical Write your answer in feet. Contour lines that are very close together indicate a steep slope. fairmount. f. Connect the Scale (contour interval): All maps have a horizontal scale. 2. A red "X" in Figure 9.5 marks a spot on a contour line along the shore of Baskahegan Lake, but the printed DEM doesn't say anything about its elevation. 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). f. Is the elevation of waypoint C > or < waypoint B? 2009-2021 The Constructor. Table of Contents and lab manual chapter pdf files for download, Overview of Canadian Geology and Mineral and Energy Resources, 4. Its Calculation, Uses and When it is Required, Factors Affecting the Selection of Contour Interval. Likewise the "40" contour connects depths of 40 ft below sea level and so on. 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. Adjacent means next to. If you trace the length of a line with your finger, each point you touch is the same height above sea level. (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. The number of lines obtained in the above step is taken and added with 1. Index contour lines: Every fifth contour line is a thicker, "index" line.At some point along that line, its exact elevation is listed. What is the relief (difference in elevation) between Little Tomah Lake and the top of Tomah Mountain (look for "Tomah Mtn")? 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. S waves cant travel through liquids and this depth is where the liquid outer core exists. 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. The other side is covered with a layer of fiberglass 2.5cm2.5 \mathrm{~cm}2.5cm thick. Generally, there are various contour intervals for the various maps. 1 ft = 24,000 ft, and 24,000 ft x (\(\frac{1\;km}{3280\;ft}\)) = 7.32 km. Choose the appropriate profile below. As an example, To take the difference, subtract the higher elevated line with the lower elevated line reading. Zoom out and examine the surrounding area, what geological hazards are likely in the area? 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. Remember, because of isostasy the denser plate will be lower than the less dense plate. 2. Approximately how far did the pole move per day? Provided is a topographic map of a hill with contour lines drawn showing elevation in meters. than 6760 feet, but less than 6800 feet. Index contours are bold or thicker lines that appear at every fifth contour line. Vertical The steepest path on a topographic Surface is always perpendicmar to topographic contour at the point where the flowline crosses the contour. What is the elevation of the base of the monument in meters? The given point, 537', therefore, must lie between the 520' and 540' contours (contours aand b). Country Contour lines The final answer we get after dividing is the contour interval of the specific topographical map. For example, the first hill on the left has a top contour line of 50ft. These marked or labeled lines are known or termed as Index Contour Lines. 3. When the contour interval is not specified in the map, it can be calculated as explained in the following sections. 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. The direction of plate movement in the last 1.1 million years. It is usually shown in or near the map's legend. Compare the contour intervals from the Royal Gorge, Colorado map (map 5.1) to the Omaha N, Nebraska-Iowa map. What approximate discharge would be associated with a 50 year recurrence interval? The terms below This content is subject to copyright. The zone from 20-2900 Km represents the earth? This may be easier to determine by examining the tributaries to the main stream. (2 pts) What is the ratio scale used on this map? View the full answer. A standard topographic map uses contour linesto express elevations above sea level and show the shape of the land. refers to height in feet, or meters, above sea level). As a contour approaches a stream, canyon, or drainage area, the contour lines turn upstream. 19. B. Construct flow lines emanating from each point " x " to illustrate the groundwater flow field on the map. Assume that water flowed through these valleys at some time. Orbiting spacecraft contain internal gyroscopes that are used to control their orientation. 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. When she treated such a mixture with EDTA, everything dissociated to 30S30 \mathrm{~S}30S and 50s50 \mathrm{~s}50s particles. At 2900 Km the S wave velocity falls to 0. If the numbers associated with specific contour lines are increasing, the elevation of the terrain is also increasing. 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? Use the slope percent equation and solve. with the elevation of the contour it represents. lowest line (which is 6760 feet, and not marked) has an elevation equal or greater 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). Index contours are bold or thicker lines that appear at every fifth contour line. 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. These circular patterns indicate hilltops, like in the diagram below (Figure 3.6). The small contour interval, the survey work and plotting have to be more accurate. contour lines represent steep slopes, conversely, contour lines that are spaced It is determined as follows: Let's take an example of two contour lines which are labelled. Note: elevation is metres above sea level; thus, sea level = ______ m. 2. The contour interval is stated on every topographic map and is usually How are depressions marked on a topographic map? Stream What type of drainage pattern is present in this area? The run is 1000 feet and the rise in elevation is 120 feet. Want to create or adapt books like this? To determine the %slope from Point A to Point B, the rise and run must first be determined. 40 feet - 20 feet = 20 feet 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). Note: the maps used in this lab are in colour and the colours have significance in terms of the symbols and patterns used on the maps it is best to print this lab in colour and from a pdf version. The difference in elevation between one contour line and the next. Join TheConstructor to ask questions, answer questions, write articles, and connect with other people. 300 A. For small contour interval, the money required will also more as the field and office work will be more. The column and row indices of Z are the x and y coordinates in the plane, respectively. Hint: draw a simple map or a rough cross-section sketch to help illustrate your logic. The older unconformity is a Nonconformity, while the younger is a Disconformity. 8. Betwe View the full answer Transcribed image text: What is the contour interval for the figure below? Calculate the stream gradient of Grape Creek in ft/mile. Refining interval counts to include these produced Figure 7 and - Table 8, below. In the context of evolution through natural selection, explain why multicellular organisms have specialized exchange systems and surfaces. The zone from 5100-6400 represents the Earth's ? Examine the path of the river that feeds into and flows out of Quail Lake. 1) The contour interval between contour is 40m. Show your work! B. What type of plate tectonic boundary is present? The difference in elevation between the highest and lowest points in the area on the map. 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. Map Example The numbered contour lines are the index contours; the unnumbered contour lines are the supplemental contours. First, subtract the lower number from the higher number and then divide the result by the number of contour lines. which of the following is the best way to obtain an absolute date for the sequence of rocks, the geologist determines there is 78.3% of the parent remaining in the sample that they examine. Controls the size of characters in the contour labels; default is 0.08". A contour map consists of contour lines of a given geographical region. Gradient: Stream gradient can also be determined from a topographic What is the relationship between the relief of an area and the contour interval on a map of he area? 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. 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? trend up valleys and form a "V" or a "U" where they cross What is the gradient? If the user enters 3.14 in response to the following programming statement, what will be stored in value? Also no adds. backward or by clicking on the arrows above and below the eye in the upper 8,194,375 years to sink. Log in to TheConstructor to ask questions, answer peoples questions, write articles & connect with other people. (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. as sinkholes, underlying soluble rock was dissolved and area collapsed. Once your points are plotted on the graph paper, you simply connect the dots. This is a critical skill to prepare students to learn about more complex geologic maps. These circular patterns indicate hilltops, like in the diagram below (Figure 3.6). (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? What would cause two separate samples of pure water to have slightly different pH\mathrm{pH}pH values? To use the same interval for both x and y , specify xyinterval as a two-element vector of the form [min max]. A rounded contour indicates a flatter or wider drainage or spur. The peak is normally considered to be located at half the interval distance. What does each contour line on a map show? 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. What color shows buildings, bridges and railroads? 1. (Answer to the nearest foot.) Use the appropriate conversion factor to convert the horizontal map distance to horizontal ground distance. Set up the cancellation table so all units will cancel, except the desired unit, feet. -- - . Example 4- What is the slope percent in Exercise 2 above? What can be said about level surfaces of \varphi? Determine the height of Mount Price. According to the geothermal gradient, rocks buried 75 km beneath the surface would normally be at what temperature? To keep the contour map simple and easy to read, not every contour line is marked with its elevation reading. What would happen to the mantle rock at point X if water is added to it? What is the straight line distance between the 8996 b and the 7202 b benchmarks located north and northwest of Phelps Lake? Determining Constructing a topographic map by drawing in contours can be easily done if a person remembers the following rules regarding contour lines: As you draw a contour line on a map you will notice that the elevations on one side of your line will be lower elevations, and elevations on the other side of your line will be higher elevations. on the paper the exact place where each contour, stream and hill top crosses What shape are the contour lines that cross a valley or stream? points. Q. lines enclose smaller and smaller areas. 500/10=50 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. Write your answer in feet. Explain why. At the point where 2 contour lines would cross would have 2 different elevations which is impossible. Sorry, you do not have permission to ask a question, You must log in to ask a question. the result from the nearest marked contour line. Measure the distance, using bar scale, between the pole in 1400 and 1500 (locations C and D). located below the scale. These same fossils can be found in Australia, which indicates it, along with Antarctica, was also part of Pangaea at that time. The shaded areas indicate the 95% confidence intervals. During the flood event of 9/23/2009, the discharge measured at this gaging station was 21,200 cfs. 2. Refer to the figure below. It is thought to have formed by the runoff of either precipitation or groundwater. For consistency, assume that elevations between contour lines are 1/2 a contour interval higher than elevation of the lower line. (b) Notice how a mountain saddle, a ridge, a stream, a steep area, and a flat area are shown with contour lines. Is the school likely to be at risk of contamination from this same leak? which Geologic Law did you use to come to the conclusion you made in the previous question? o drainage ' divide or watershed boundary 1000 ft -::-:: Contour interval 50 Feet Figure 12.5 Flow lines across a topographic surface. What is the change in elevation across each contour interval (i.e., between successive "regular" contours) on this map? https://openpress.usask.ca/app/uploads/sites/52/2018/08/SKtopomap_v2.pdf. When you join you get additional benefits. Refer to the figure below and assume contour interval of 10 feet. Index contours increase by 250. The outside of the fiberglass is maintained at 35C35^{\circ} \mathrm{C}35C, and the total heat flow through the copper-fiberglass combination is 52kW52 \mathrm{~kW}52kW. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. The horizontal distance between two points on two consecutive contour lines for a given slope is known as horizontal equivalent. How far (in Km) did the pole move in one year during this time period? 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. The difference between adjacent contour lines. nervous system and circulatory system endocrine and repertory system circulatory and respiratory systems nervous system and endocrine systems .
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what is the contour interval for the figure below?