Ravine

Small valley, often due to stream erosion

A ravine is a landform that is narrower than a canyon and is often the product of streambank erosion. Ravines are typically classified as larger in scale than gullies, although smaller than valleys. Ravines may also be called a cleuch, dell, ghout (Nevis), gill or ghyll, glen, gorge, kloof, and chine

This keyword could refer to multiple things. Here are some suggestions: