Problem: Geological structure problems can be reduced to problems of intersecting lines ( a point), intersecting planes and lines (a point), and intersecting planes ( a line).

In this problem you can reduce the structure to that of two intersecting planes.

In Albert Parish, the local aquifer is known as the Maison sandstone Formation, a very porous permeable layer of buried sandstone.

The Maison sandstone strikes 55 degrees East of North and dips 30 degrees to the northwest.

The Maison sandstone exists only east of the Piggly Fault. Experience has shown that the best quality drinking water is found where the fault (010/60 E) intersects the Maison sandstone.

A well in the Parish immediately north found the Maison sandstone

at 200 m depth. However, the town of Depot has only enough money left in its yearly budget to contract local drillers to sink a well 150 meters deep or less inside the Parish limits.

Question: You have been called in to assess whether the Parish can find water or whether it has to buy it from the Parish to the north.

What is your verdict?

Where the well should be drilled?

Should it be drilled at all?

Where would you drill?

Show all your work. Draw in the correct symbol for the fault. Draw in the correct symbol for the strike and dip of the fault. Find a convenient scale to use. What's your scale?