Discussion
Aerial photographs are valuable in geological investigation chiefly for revealing
Answer: A
Correct answer: lineaments, drainage patterns and old landslides
Aerial photographs show the ground as a whole, and features invisible from within the site read clearly from above: fault lineaments, drainage anomalies, the lobate form of an old landslide, differences in vegetation over shallow rock. Stereo pairs add the relief. What they cannot give is anything quantitative about the material itself.
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