Back to Erosion Landform
|A mountain ridge in Japan|
- A ridge is consisting of a chain of mountains / hills.
- Formed as continuous elevated crest for some distance.
Types of ridges
- In typical dissected plateau terrain.
- The stream drainage valleys will leave intervening ridges.
- These are most common ridges.
- Represent more erosion resistant rock.
2. Stratigraphic ridge
- In places such as Ridge & valley Appalachians.
- Formed un eroded edges.
- Strata that were folded laterally.
- Formed in Black Hills.
- Concentric circles around the igneous core.
- Sometimes these ridges are called "hogback ridges".
3. Oceanic spreading ridge
- Tectonic spreading zones such as at the Mid-Atlantic Ridge.
- The volcanic activity forming new plate boundary.
- Isostatic settling & erosion gradually reduce elevations moving away from the zone.
4. Crater ridges
- Large meteorite strikes.
- Formed by large impact craters.
- Bordered by circular ridges.
5. Volcanic caldera ridges
- Large volcanoes leave collapsed central calderas.
- That are bordered by circular ridges.
6. Fault ridges
- Formed by escarpments.
- The tops of the escarpments form not plateaus.
7. Dune ridges
- In areas of large-scale dune activity.
- Result in sand ridges.
8. Moraines and eskers
- Glacial activity leave ridges.
- An arête is a thin ridge of rock.
- That is formed by glacial erosion.
9. Volcanic sub glacial ridges
- Create ridge like formations.
- Lava erupts through a thick glacier / ice sheet.
10. Shutter ridges
- Which has moved along a fault line.
- Blocking / diverting drainage.
- Creates a valley corresponding to the alignment of the fault that produces it.