Exfoliation Weathering
Exfoliation Weathering, also known as unloading, is a type of mechanical weathering that occurs when layers of rock peel away from the surface.
This process is caused by a reduction in pressure on the rock, which can be due to:
- Uplift of the rock by tectonic forces
- Erosion of overlying rock layers
- Cooling of igneous rock
When the pressure is reduced, the rock expands slightly. This expansion can cause cracks to form in the rock, especially along existing weaknesses such as joints and bedding planes. Over time, water and ice can seep into these cracks and freeze. As the water or ice freezes, it expands, putting pressure on the rock and widening the cracks. This process can eventually cause the rock to break apart into layers. Exfoliation weathering is most common in areas with dry climates and large daily temperature swings. It is also common in areas where rocks have been uplifted by tectonic forces.
Here is a table summarizing the process of exfoliation weathering:
Factor | Description |
---|---|
Pressure reduction | Uplift, erosion, or cooling can reduce the pressure on rock. |
Expansion | Rock expands slightly when pressure is reduced. |
Cracking | Expansion can cause cracks to form in the rock. |
Water/ice wedging | Water or ice can seep into cracks and freeze, widening them. |
Exfoliation | Layers of rock peel away from the surface. |
Check-out: What Is Soil – Types & Composition
Mechanical Weathering
Mechanical Weathering, also known as Physical Weathering, is nature’s way of breaking rocks into smaller pieces. Imagine it as rock transformation through a series of natural actions. Factors like temperature, plants, and the rocks themselves play key roles in this process. Temperature takes center stage, causing rocks to expand and contract, slowly breaking them down over time. Plants contribute by sending their roots into rock crevices, applying pressure that eventually leads to rock crumbles. Even rocks, seemingly solid, yield to the wear and tear from wind-blown sand or the relentless force of waves along coastlines.
In this article we’ll discuss about Mechanical Weathering, Its Types, Factors, Process and so on. To know more, Stay Tuned!
Table of Content
- Mechanical Weathering
- What Is Mechanical Weathering?
- How Mechanical Weathering Works?
- Types Of Mechanical Weathering Process
- Stages Of Mechanical Weathering
- Factors Affecting Mechanical Weathering
- Freeze-Thaw Weathering Or Frost Wedging
- Exfoliation Weathering
- Thermal Expansion
- Abrasion Weathering
- Salt Weathering Or Haloclasty
- Difference Between Mechanical Weathering And Chemical Weathering
- Difference Between Mechanical Weathering And Physical Weathering
- Difference Between Mechanical Weathering And Biological Weathering