Physics and Astronomy

Sulfur In Peace

A topographic map is given below showing elevation contours (in 10 m intervals), the Ninja River and the Gaza Fault. Your objective is to study the map and analyze the information given below, and then answer the five questions at the bottom of the page.

Participants Teams of up to four.
Information Known

The terrain is hilly, the result of erosion over the last 10,000 years. A team of geologists has studied the bedrock in the area. They have learned that:

1. A horizontal layer of pure sulfur (D = 2.1 g/cm3) is exposed locally in the map area.
2. The layer is 15 m thick, and the top of the layer lies 25 m below point 'A'.
3. The Gaza Fault crosses the map area. The Gaza Fault is a vertical fracture plane in the bedrock.
4. Movement along the fault plane has uplifted the bedrock northwest of the fault exactly 5 m relative to the southeast side.

Questions 1. How far would a vertical hole have to be drilled at point 'B' to reach the bottom of the sulfur layer? (m)
2. How far would a vertical hole have to be drilled at point 'C' to reach the top of the sulfur layer? (m)
3. Could you mine the sulfur at point 'D'? Explain your answer.
4. Using a pencil, shade in all that area on the map in which the sulfur is exposed at the surface, assuming no vegetative or soil cover.
5. Estimate the tonnage of sulfur available for mining in the map area, given that the map scale is 1 cm = 100 m.(tonnes)
Judging The team with the most correct answers is the winner.
Topographic Map
3 D Relief Plot
Source Technical University of Nova Scotia.

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