Tensional stress in the Earth's crust leads to the formation of normal faults.

Here's why:

* Tensional stress pulls rock masses apart.

* Normal faults are fractures in the Earth's crust where the hanging wall (the block above the fault) has moved downwards relative to the footwall (the block below the fault). This downward movement is caused by the pulling force of tension.

Let me know if you'd like to know more about other geologic features!