Weathering vs. Erosion
Weathering and erosion typically happen over hundreds, thousands, or even millions of years. Boulders become sand and mountains are. Weathering and erosion are two geological processes that deal with the change or The primary difference between weathering and erosion is that weathering. The Earth's land is always changing. Two processes that contribute to those changes are weathering and erosion. In this lesson, you will learn all.
All of these landforms normally help slow down flood peaks and sustain stream flows during droughts. Wetlands and barrier islands can even decelerate a storm surge from a hurricane. Streams and creeks are also at risk.
Erosion! The Ever-changing Earth - Kids Discover
In the s, the U. Department of Fish and Wildlife decided that all the trees that had fallen into the rivers and streams were causing problems. So were the massive beaver dams that flooded the valleys and created huge wetlands.
The trees formed logjams in the creek beds. The beavers were flooding areas where people wanted to farm and provide pastureland for their domestic animals. All the debris and all the beaver dams… miles and miles of natural habitat that, historically and for thousands of years, and had provided a stable and healthy ecosystem, were removed.
Weathering - Weathering and Erosion - Kids Geology - Kids Know IT
A great percentage of wetlands were drained or diminished. The creeks, once filled with gravel beds, beaver dams, and natural logjams that provided nesting grounds and havens for native salmon and trout, were scoured down to nothing but bedrock and silt. In turn, in some species, the native fish populations were and still are decimated to the point of near-extinction.
Thankfully, in many areas, the clean-up practices have stopped. Watershed councils formed to try to help repair the eroded banks, and property owners with creek frontage are being educated about restoration efforts.
Weathering vs. Erosion
Some of the things being done are: Homeowners and volunteers are diligently planting native brush and trees along creek banks and eradicating invasive plant species that usurp native plants. Vegetation with a solid root system helps to keep the banks from further erosion while it provides shade for the creeks in the hot summer. People with domestic livestock are being encouraged to keep their animals back from the creek and their manure picked up for other uses, such as organic fertilizer.
Projects to create fish habitat are gaining in popularity when volunteers and money are available. Types of Weathering There are three main types. To be clear, these are broad categories.
None of them are completely separate. Plants, as organismscause biological weathering.
- Erosion! The Ever-changing Earth
But, they do so by physically breaking up rocks and releasing chemicals onto them. What this tells us is that we have to look at the following types carefully. Mechanical Physical Mechanical weathering refers to the physical separation break-up of a material.Weather, Erosion, Deposition
So, here are some examples to clarify: Wind shears a rock. The push is small, of course. But, over time, all the pushing adds up.
It might chip pieces off of the solid. If they end up blowing far away, we call it wind erosion.
Ocean waves smash into the coast. Coastlines often have very unique shapes to them. Much later, the digging can produce interesting patterns.
Small waves break against coastal rock. It takes place at the atomic level. But, we can learn from examples of what we know as chemical weathering. Wind picks up small pieces of rock and blows them against larger stones, causing small particles of the larger formations to break off.
The same wind picks up these particles and takes them away from the rock they broke off of. Types of Weathering There are two distinct types of weathering, which alter and degrade rock in different ways. Physical weathering breaks down a rock's physical structure. For example, in cold environments water that gets into holes in rock and freezes will cause those holes to expand and eventually crack and split the rock.
The same process may be caused by salt buildup or growing tree roots. Another form of physical weathering occurs when wind or water causes rocks to rub against each other, smoothing their surfaces. Chemical weathering changes the chemical structure of rock, causing it to become softer or more brittle.
For example, iron in a rock might react with oxygen to form easily degradable rust, or acids in rainwater may remove calcium from limestone and marble.
Chemical weathering often precedes physical weathering, making rocks more vulnerable to forces like wind and rain.