This is an Earthcache. There is no physical container at the posted coordinates, but rather a geological lesson for you to explore. Please review the information on the cache page, then make your way to Ground Zero to make your observations and answer the three questions below. Email your answers to the cache owner by clicking the "message this owner" button above, and once complete, you can log this cache.

Thanks and happy caching!

QUESTIONS

1. Do you think the formation at GZ more closely resembles a ravine or gully? Please provide reasoning for your answer based on its characteristics and the readings on the cache page.

2. Observe the heights of the slopes and estimate the height and angle to the best of your ability.

3. How do you think this specific formation occurred? Is it U-shaped or V-shaped?

(Required) Post a picture of yourself with the ravine in the background.

What's the difference between a ravine and a gully?

Gully:

• Definition: A gully is a narrow, steep-sided channel formed by the removal of surface soil and rock due to concentrated water runoff, typically during heavy rains.
• Size: Gullies are smaller in scale, with depths often less than 1 meter, though they can grow deeper with continued erosion.
• Formation: Gullies develop when surface water converges into narrow channels, eroding the soil and creating trenches that are too deep to be removed by normal tillage operations.

Ravine:

• Definition: A ravine is a larger, steep-sided valley formed primarily by the prolonged action of water erosion, often featuring a stream or river at the bottom.
• Size: Ravines are more substantial than gullies, with depths typically exceeding 5 meters, making them too large to traverse with vehicles.
• Formation: Ravines result from the continuous erosion of land by water over extended periods, leading to the development of deep and wide valleys.

Key Differences:

• Scale: Gullies are smaller landforms, while ravines are larger and more pronounced.
• Formation Process: Both gullies and ravines form through water erosion, but ravines represent a more advanced stage of this process, often evolving from the expansion of gullies.
• Agricultural Impact: Gullies may be small enough to be managed or filled in agricultural settings, whereas ravines are typically too large for such interventions.

Formation of Ravines

Ravines are landforms created primarily through the process of erosion by running water. They often develop in regions with hilly or mountainous terrain, where water runoff is guided downhill by steep slopes, leading to the gradual removal of soil and rock. Over time, this erosion deepens and widens the channels, resulting in the formation of ravines. 

Human activities, such as deforestation, unplanned cultivation, overgrazing, and construction, can accelerate ravine formation by destabilizing the soil and increasing surface runoff.

Appearance and Characteristics

Ravines are characterized by their narrow, steep-sided valleys, which are larger than gullies but smaller than canyons. They typically have slopes ranging from 20% to 70% in gradient and can vary in width, often spanning several hundred feet. The cross-sectional shape of a ravine can be either ‘U’ or ‘V’ shaped, depending on factors like the type of soil, vegetation cover, and the intensity of erosional processes. 

Ravines can be classified based on their cross-sectional shapes:

• U-shaped ravines: These have a broader base and gentle slopes, often resulting from prolonged erosion in areas with cohesive soil that resists rapid down-cutting.
• V-Shaped Ravines: Characterized by a narrow base and steep slopes, these form in regions where rapid down-cutting occurs, typically in less cohesive soils or areas with intense water flow.