Here's what makes it distinct:

* Steep Sides: The slopes of a steep valley are at a high angle, often close to vertical in some sections. This makes them difficult to climb or traverse.

* Narrowness: The valley floor is relatively small compared to the height of the sides.

* Depth: The valley is significantly lower than the surrounding land, creating a noticeable drop in elevation.

How are steep valleys formed?

* Erosion: Steep valleys are often formed by the erosive power of rivers, glaciers, or wind. As these forces carve away at the landscape, they create deep and narrow channels.

* Geological Processes: Faulting and tectonic activity can also create steep valleys. As the Earth's crust shifts, it can create cliffs and deep depressions.

Examples of steep valleys:

* Canyons: The Grand Canyon is a classic example of a steep valley formed by the Colorado River.

* Fjords: These are steep-sided inlets formed by glaciers.

* Mountain Valleys: Valleys nestled between steep mountain peaks often exhibit a steep character.

Interesting Notes:

* Steep valleys are often characterized by dramatic scenery, with towering cliffs, waterfalls, and rugged terrain.

* They can be challenging to navigate due to their steep slopes and potential for rockfalls.

* They provide habitat for specialized plant and animal life that can thrive in these harsh environments.