TOPOGRAPHIC MAP EXERCISE (Revised)
For questions 1 -> 5, give the correct Township-Range grid locations of the following landmarks or topographic features on the map:
1. The water tank, near Green Acres Country Club, north of Route 68:
|SE 1/4 of SW 1/4 of Section 2, T42N, R12E|
2. The waterworks, at the extreme southeast corner of Fort Sheridan:
|SW 1/4 of NE 1/4 of Section 14, T43N, R12E|
3. Bannockburn School, along Telegraph Road, west of Waukegan Road:
|SW 1/4 of NW 1/4 of Section 20, T43N, R12E|
4. Red Oak School, north of Clavey Road, east of N. Branch Chicago River:
|SE 1/4 of NW 1/4 of Section 34, T43N, R12E|
5. Sportsman Country Club, south of Route 68, 1/2 west of Landwehr Road:
|NE 1/4 of NW 1/4 of Section 8, T42N, R12E|
6. What is the highest topographic elevation point in the SW 1/4 of SE 1/4 of Section 12, T42N, R12E? Where is this land located?
||The Skokie Lagoons|
7. Locate the NE 1/4 of SE 1/4 of Section 3, T42N, R12E. Are there any contour lines which indicate a depression rather than a hill? What is located inside this feature?
|Yes, there are hachure lines which radiate inward towards the center, indicating a depression (perhaps a rock quarry?)|
8. What is the longest distance (to the nearest 100 feet) covered by the Skokie Lagoons? What is this distance in miles (to the nearest 1/10)?
9. Note the pattern of contour lines along the shoreline of Lake Michigan. These are known as the Highland Park bluffs. How steep of a drop is it from the top of the bluffs into the lake? What geological processes produced the bluffs?
|There is at least a 50 foot drop from the top of the bluffs to the lake.||The bluffs were caused by wave erosion from Lake Michigan.|
10. Why do the contour lines of the Highland Park bluffs extend inland, some as far as one mile?
|These are called ravines, which are embayments caused by both the melting of the last glaciers and periodically rising lake levels.|
11. What distance in feet is covered going East to West, along the southern boundary of this map?