Final answer:
To find water as a geologist, you would drill into the area with laterally continuous sand layers, which are the best aquifers. The minimum drilling depth for a new water well depends on the specific rock formations and aquifers.
Step-by-step explanation:
If you were a geologist looking for water in the given diagram, the area where you should drill an exploratory well would be the one with the laterally continuous sand layers. These sand layers are the best aquifers and would serve as the best source of water. The minimum depth you would need to drill to install a new water well would depend on the specific rock formations and aquifers in the area, which can vary in depth.