A Trench
7.7 hours
canyon
using 3/4" rock fill 257' by 155' hole 2' deep
A shape with 12 sides is called a dodecagon.
This is known as a gully, which forms through erosion as water flows downhill, cutting into the soil and creating a channel. Gullies can become larger and more pronounced over time if not properly managed, leading to soil erosion and potential environmental challenges.
fissure, volcano, ditch, valley.
It is called a moat
The ditches at the sides of a country road are called "cunetas." Singular: "cuneta." (culverts). Trench, irrigation ditch = zanja
deep valley i think :)
Canyon
A gully is a water-worn ravine or small valley, often caused by erosion from heavy rain or flooding. A ditch, on the other hand, is a man-made trench dug to channel water or provide drainage. While both can be used to manage water flow, gullies typically form naturally, whereas ditches are constructed by people.
A Trench
A deep gully or ditch carved by running water is called a ravine. It is typically formed by the erosive forces of flowing water over a long period of time, creating a narrow and steep-sided channel in the landscape.
The men dug a deep ditch to lay pipes for the new septic tank. I fell in the ditch, but luckily it was dry.
Valley
It varies, but it is usually 50 feet deep in most places.