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Questions tagged [erosion]

The movement of materials such as rocks, sands, and soils from and along the Earth's surface due to physical processes such as, but not limited to, rain, ice, wind, and gravity.

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Mechanisms in Chemical Erosion

We know that there are two types of erosion; physical and chemical erosion. Chemical erosion is generally caused by the dissolving of rocks into a solvent. That solvent is usually water. I am ...
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Will the oceans swallow all of the land?

I am wondering why, since the oceans could feasibly hold all of the dry land, they in fact do not. For example, the Mariana Trench drops to -10.9km, while Mount Everest only reaches to +8.8km. ...
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Geological feature - what is it?

Hello, We were walking in Bundoran in Donegal County, Ireland today and we encountered the geological feature shown in the picture (from above from cliffs and from very close up at beach level). We ...
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How does this melted-wax erosion pattern form in sandstone?

How does this kind of erosion pattern that looks like melting wax form in sandstone? Can you describe the kinds of processes and kinds of rocks that are needed for this? I've seen it in Nevada, but ...
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Is an underground mine collapse or a tunnel collapse called a sinkhole?

Imagine there's an underground man made structure e.g. a tunnel or an underground train station that collapses creating a depression in the surface. Would that technically be called a sinkhole? What ...
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Rotation Rate and Wind-related Erosion

I was debating with a friend of mine on how the rotation rates of the Earth or any other planet in the Solar System might possibly affect the strength and frequency of cyclones or any wind-related ...
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Who would know how to manage rainwater erosion on a sloped property?

I'm a meteorologist with little experience in hydrology. I'm studying my land with the rainwater flow patterns during heavy rain events and looking to manage the erosion, flash flooding, and ponding ...
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Confused about whether physical impact is 'erosion'

When I dropped a stone or a crystal onto the floor, can it be considered as erosion? What is the difference between rocks breaking due to natural disturbances vs human action? Here is the stone/...
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Water gaps in mountain ranges: which is older, the river or the mountains?

"Water Gaps", where rivers cut through montains, seem impossible. What came first? If the mountain was there first, the river would have simply found lower ground. If the river was there first, it ...
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The environments of particular deposits

I came across this question in my text book: "During a visit to a mountainous area, students noticed a high mountain consists of 3 different parts: The top of the mountain consists of fossiliferous ...
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What processes cause basalt to form a columnar structure? [duplicate]

I have run across many pictures of rocks that look like almost perfectly carved columns. For example: the Twyfelfontein Organ Pipes, the Basaltic Prisms of Santa Maria Regla, and the waterfall ...
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How long will it take for the ocean to erode Rockall?

Loosely related to the question Will the ocean eventually erode all land?: How long will it take for the ocean to erode Rockall (an uninhabited granite islet within the exclusive economic zone of the ...
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Could a massive flood have formed the Grand Canyon?

I believe that the accepted theory for how Arizona's Grand Canyon was formed was that erosion caused by the Colorado River flowing through the area over millions of years was the force at work. Yet ...
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The Dust Bowl: how's the recovery of all that topsoil going?

I must admit this is very confusing: one gets different types of information from different sources that often contradict one another. It is said that the main event occurred due to some misguided ...
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4answers
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Are craters on Earth covered by vegetation?

When you look at other planets and moons in our solar system most of them have lots of craters. If Earth had no vegetation and water would it also look like this image of Charon? Image Credit: NASA/...
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Have there ever been any islands that disappeared due to rising sea level?

With global warming comes rising sea levels. This has been going on for at least fifty years. So haven't there been some islands that have been swallowed by now? An island could be nothing more than ...
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Will the ocean eventually erode all land?

It seems as if the 'lowest energy' state for the Earth is to not have any mountains and that given enough time, the oceans would erode all land. Essentially it's an argument like entropy. And I mean ...
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How did sand dunes appear in the midst of a fertile region?

I recently visited a place called Talakad/Talakadu about 40 km from Mysore, India. Its an amazing place where a whole city has been covered by sand about 15 m deep. The local myth is that a curse ...
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Are there secondary causes of sea level change?

Aside from the fraction of water stored as ice on land and temperature of the water, are there other factors that change sea level, and if so what are is the magnitudes of the these changes? For ...
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Are there any photographs of mountains without significant erosion (on Earth or otherwise)

I'm curious about how mountains on an airless world such as the Moon would look if you were standing on the surface and looking at them. There are plenty of artists' impressions, of course, but I'm ...
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What made the Grand Canyon the “greatest” canyon in the world [closed]

The Grand Canyon is nearly 446 km (300 miles) long, 29 km (18 miles) wide, and over 1,8 km (1 mile) deep. To the best of my knowledge, there is no other canyon of comparable size in the world. Is ...
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How have global sedimentation rates changed over the last billion years?

Do we have a graph of how sedimentation rates changed over time?