Contrast weathering erosion and deposition
Physical and chemical weathering of rocks
Processes that break down rocks and transfer materials are present on the planet’s rocky surface. This chapter discusses how rocks weather and erode to form sediments, as well as how sediments are transported and modified to deposition sites. Weathering and erosion have a variety of effects on the land’s surface. Most of this has to do with the mechanical, chemical, and biological processes that break down rocks and shape the landscape, including soil formation. Gravity plays an important role in mass waste, which is the process of moving material downhill in a number of ways. Mass wasting is linked to a number of severe landslide hazards, many of which are exacerbated by heavy rain. Landslides can happen slowly or quickly, and they can happen at any time (such as events associated with seasonal storm floods or some that are triggered by earthquakes or human activities).
Surface-exposed rocks are subjected to physical and chemical interactions with air and water, as well as temperature and pressure changes. The mechanical and chemical disintegration of rock on the Earth’s surface is known as weathering. Sedimentation is caused by weathering, and erosion is caused by erosion. Weathered materials are dragged downhill by gravitational forces and transported by erosion forces associated with moving water, ice, or wind. Erosion refers to the wearing down and removal of materials that are exposed on the surface. This involves items that have been exposed on land, under the oceans, or under glaciers. Weathering and erosion of rock produce sediments, which are solid particles of inorganic or organic material. Soil is made up of sediments and organic matter, and it is formed by weathering and erosion processes.
Compare and contrast physical and chemical weathering
The chemical and physical decomposition of rocks and minerals caused by interaction with our atmosphere is referred to as weathering. Weathered rocks and minerals do not move during the decomposition process. Erosion, on the other hand, is caused by the entrainment and transport of rock and mineral particles by wind, water, ice, and gravity; a decrease in the transport medium’s velocity or a rise in the resistance of the transported particles causes deposition or the addition of material to the landscape. It’s worth noting that biota (also known as biogeomorphology) can play a role in both weathering and erosion.
The standard of your writing will be graded. You do not actually write down your answers and send them to me. Instead, write a short stand-alone paragraph (or website, or whatever you feel is appropriate given any restrictions I might have imposed) so that everyone can read and understand what you’ve written. When answering to the questions, you should try to be as precise and thorough as possible. Your responses should be analytic, reflective, and informative, with a clear link between ideas. The writing should be concise and clear, with a variety of sentence structures and a severe, professional tone.
Erosion and sedimentation: how rivers shape the landscape
The unconsolidated materials that we find on slopes, under glaciers, in stream valleys, on beaches, and in deserts are noticeable products of weathering and erosion. Sediment is a loose array of content, and the individual bits that make it up are called clasts. Clasts may be as small as sand (in which case they may be referred to as particles or grains) or as big as a building.
Clasts come in a variety of sizes and shapes (Figure 8.16) depending on the manufacturing and transportation processes. If and when these deposits are transformed into sedimentary rocks, the mineralogy and textures of the resulting rocks can differ dramatically. Importantly, we can research the mineralogy and textures of sedimentary rocks that formed millions of years ago to make inferences about the conditions that occurred during the deposition of the sediment, as well as the later burial and formation of sedimentary rock. Composition, grain size, sorting, rounding, and sphericity are the properties we examine.
Erosion and weathering for kids -causes and differences
As mountains are formed, they produce high relief, which causes disequilibrium in the Earth’s crust. Gravity works through erosion under these conditions, redistributing mass from higher to lower elevations in search of equilibrium established by the base level.
Chemical weathering and physical breakup shape the earth’s surface after tectonics and volcanism form mountains. They’ll destrog a mountain belt’s excess topography, turning rocks to sediment.
Depending on the relative rates of erosion and thickening, as well as their initial depth in the crust, rocks can move up or down in the crust. Exhumation during thickening is only possible if the thickening process is accompanied by rapid denudation. The initial depth from which rocks can be exhumed during homogeneous thickening with elevation-dependent erosion is determined solely by the density distribution in the column and is unaffected by erosion or thickening rates.