You are presented with the question "Where can one readily see the geologic history of an area?" and the following answer choices: 
- down
 - scuba diving
 - soils
 - pastureland
 - canyon
 - driving
 - Mountains
 - mines

Now knowing that most canyons are formed by flowing rivers through erosion over long periods of time and striations in rock forms are seen along the river and tell the geologic history of the area, choose the best answer.


 

     canyon    