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INTRODUCTORY GEOLOGY
TOPOGR APHIC MAPS
Name________________________
3.8 TOPOGRAPHIC MAPS LAB ASSIGNMENT
Note: This lab is in color. Therefore, if you print it out in black and white
please refer back to the electronic copy to avoid confusion.
This Lab Assignment is to be mailed to your Instructor at the contact address
recorded in the Syllabus. Make sure that you use additional postage if needed.
There is no online assessment for the Topographic Maps Lab.
Complete the entire assignment and mail to your instructor postmarked by the
assignment deadline. You should make an extra copy to practice on and mail in a
clean and neat version for grading. Make sure to include your name on every page
and staple all of the pages together.
Please take advantage of all of the resources available to you. Be sure to read
the corresponding lecture which contains directions to work out the solutions to
the problems below. You should also review the instructional videos located in
the unit content area within the course for additional assistance. Finally, check
the Topographic Map Unit Discussion forum and the tutor talk area for additional
resources and hints.
3.8.1 Topographic Maps Lab
127(For all of the following ¿gures, assume 1orth is up.
1. (10 pts) The following topographic map (Map 3.1) is from a coastal area and
features an interesting geological hazard in addition to the Ocean. Using a
contour interval of 40 meters, label the elevation of every contour line on the
map below. (Note: elevation is meters above sea level, which makes sea level =
___m).
Map 3.1
Author: Brad Deline
Source: Original Work
License: CC BY-SA 3.0
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INTRODUCTORY GEOLOGY
TOPOGR APHIC MAPS
2. (10 pts) Imagine you are a geologist for the United States Geological Survey.
You are tasked with creating your own coastal Topographic map, so you hike
around the area with a GPS receiver (Global Positioning System) and every so
often you record your position along with the elevation in meters at that point,
which results in the following map (Map 3.2). Complete Map 3.2 by adding in
the contour lines using a contour interval of 100 meters. Draw the contour lines so
that they are continuous (do not die ŏ), and either continue ŏ the map or
form an enclosed circle (look at the topographic map in the problem 1 for an
example). More often than not, your contour lines will fall between the GPS
points on your map, so do your best to determine the contour line positions.
Map 3.2
Author: Brad Deline
Source: Original Work
License: CC BY-SA 3.0
For questions 3-7 refer to the Map 3.3. The following topographic map shows
an interesting and informative geological feature called a drumlin, which is a pile
of sediment left behind by a retreating glacier.
Map 3.3
Author: Brad Deline
Source: Original Work
License: CC BY-SA 3.0
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INTRODUCTORY GEOLOGY
TOPOGR APHIC MAPS
3. (2 pts) :hat is the contour interval on Map 3.3″
4. (2 pts) :hat is the regional relief on Map 3.3″
. ( pts) Using the contour lines on Map 3.3, which area along the red line is
steeper A to B or B to C” (xplain how you came to this conclusion.
6. ( pts) :hat is the gradient from A to B and B to C on Map 3.3″ Show your work.
7. (2 pts) Drumlins can be used to determine the direction of movement in the
glacier with the glacier moving toward the shallower side of the structure. Using
your previous answers for Map 3.3, what direction was the glacier traveling?
Note: unless indicated otherwise, assume that North is up (towards the top of
the map).
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INTRODUCTORY GEOLOGY
TOPOGR APHIC MAPS
8. (20 pts) Construct a topographic pro¿le from A to A¶ on the graph paper below.
Map 3.4
Author: Brad Deline
Source: Original Work
License: CC BY-SA 3.0
9. ( pts) Based on the scale you choose for the topography (vertical axis) in
question 8, calculate the amount of vertical exaggeration on the topographic
pro¿le you constructed above. Show your work.
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INTRODUCTORY GEOLOGY
TOPOGR APHIC MAPS
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10. (2 pts) :hat is the ratio scale of this map?
11. (2 pts) (xplain in a sentence how this type of scale works.
12. (2 pts) :hat is the latitude on the north edge of the map?
13. (2 pts) :hat is the longitude on the east edge of the map?
14. (6 pts) Find Big Dry Creek, which is north of 5ome. :hat direction does that
river Àow? (xplain two reasons why you came to this conclusion.
1. (2 pts) (xamine the large 5idge in the Northwestern portion of the map. :hat
is the tallest point in this ridge? How tall is it?
16. (2 pts) How much higher is that point from Lake Conasauga?
17. ( pts) :hat is the gradient between Lake Conasauga and the tallest point in
the ridge? Show your work (Hint: zooming out will let you see both features on
the map at the same time and may make it easier to measure).
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INTRODUCTORY GEOLOGY
TOPOGR APHIC MAPS
18. (4 pts) How would the gradient change if you measured from Swan Lake to the
tallest point in the ridge rather than Lake Conasauga? (xplain why.
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19. (3 pts) (xplain why this map is referred to as a 7. minute map?
20. (3 pts) :hat is the relief on this map?
21. (2 pts) Does Taggert Creek Àow into Taggert Lake or Lake Taminah? :hat
direction does the creek Àow?
22. (4 pts) Garnet Canyon (a little to the west of the word Garnet) is a common
camping location for hikers and mountain climbers at the Grand Teton’s
National Park. (xamine the topography surrounding Garnet Canyon and the
Middle Teton. :hat would be the easiest and safest route from Garnet Canyon
to the top of the Middle Teton? (xplain why. (Drawing a simple map will help).
Maps 3.5, 3.6, and Map Key (appearing on following pages)
Author: USGS
Source: USGS
License: Public Domain
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