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24 votes
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Are there secondary causes of sea level change?

Yes, there are lots of other factors. Factors affecting sea levels are no different from other natural processes: there is a large number of coupled, non-linear effects, operating on every time ...
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16 votes

Are there any photographs of mountains without significant erosion (on Earth or otherwise)

Here's how astronomers of the late 19th century thought the Moon would appear: Recreations in Astronomy by H. D. Warren D. D., published in 1879, via http://en.wikipedia.org/wiki/Selenography. Here'...
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14 votes

Could a massive flood have formed the Grand Canyon?

tl;dr: no. Long answer: First of all, like mentioned by others in the comments, you would need some physical mechanism to take a whole lot of water, evaporate it, and drop it at once at a place ...
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13 votes

How long does it take for a stone to alter?

Mountains and rock do decompose or weather into sediment. A basic rock cycle overview shows the possible pathways between all three rock types (igneous, metamorphic, and sedimentary) how one type ...
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12 votes
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Will the oceans swallow all of the land?

If no new mountains were built, yes. Ultimately the processes of erosion would render the continents flat, and the seas would be left shallow and filled with sediments. The reason that this doesn't ...
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10 votes
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Erosion without weathering?

Your concept of weathering is erroneous. It is not uncovering or stripping off material. Weathering is a very slow process of breaking down rocks, soil & minerals, in-situ, via contact with the ...
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9 votes
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How did sand dunes appear in the midst of a fertile region?

It appears the sands at Talakad are the result of a ecological disaster that occurred in the 17th Century. At the time, a dam was constructed north of Talakad on Kaveri River which caused the river to ...
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9 votes

Have there ever been any islands that disappeared due to rising sea level?

Definitely, there are lots. As you say, sea-level is rising in most (but not all) coastal areas. Indeed, at the end of the last ice age ca. 12,000 years ago, sea-levels rose about 120 m. Many islands ...
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8 votes
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Could a massive flood have formed the Grand Canyon?

In addition to all of the above there are meanders inn the Grand Canyon which are hydraulic outcomes of 'minimum energy flow configurations'. This constrains the discharge rates that are possible - to ...
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7 votes
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Confused about whether physical impact is 'erosion'

I'm assuming here that you're asking whether you can apply the term ‘erosion’ to the damage your stone suffered, rather than the damage your floor suffered. In this case, the applicability of the term ...
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7 votes
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Are there any photographs of mountains without significant erosion (on Earth or otherwise)

After I asked the question, the Rosetta mission sent back some glorious images of rocks as jagged as those on any science fiction book cover: I suppose the difference is that these are on the surface ...
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7 votes

Are there secondary causes of sea level change?

This link is a scientific talk by geoscientist Jerry Mitrovica (Harvard University) called 'Sea Level Fingerprints of Ice Sheet Collapse'. It's about an hour long, fairly technical, and focused on ice ...
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6 votes

Are craters on Earth covered by vegetation?

No, there are nowhere near this many craters on earth. I think you're asking if there are lots of craters on earth too, but they're hard to see because of vegetation and the oceans. The answer is 'no'...
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6 votes

Are craters on Earth covered by vegetation?

Without water there would be no multi-billion year history of plate tectonics, no glacial action, and no fluvial erosion, so the Earth would look unrecognizably primitive. But we have an atmosphere, ...
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6 votes

Are there any photographs of mountains without significant erosion (on Earth or otherwise)

Fresh shield volcanoes that are dome-shaped may be of interest to you. Shield volcanoes on Venus - The Pancake Domes Shield volcanoes on Earth - The Galapagos Islands
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6 votes

Are there any photographs of mountains without significant erosion (on Earth or otherwise)

I'd like to add to David's excellent answer. Your premise is that there are "mountains before erosion" is not exactly accurate. Mountains, in the sense that think of them (local elevated regions ...
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6 votes
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Is an underground mine collapse or a tunnel collapse called a sinkhole?

This is probably more of an English language question than a science question. The answer to it depends on the extent of a person's vocabulary & knowledge of a particular field of engineering. ...
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6 votes
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Could the Grand Canyon be flooded by the ocean if it got deep enough?

It is unlikely just from erosion. There are a couple reasons for this but because of the time scale over which this process would occur, other phenomenons might change the geologic picture completely. ...
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6 votes
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How do canyons form?

I guess you are talking about subaerial (as opposed to submarine) canyons, and are mostly thinking of numerical (as opposed to physical) models. I expect there are numerical models suitable for ...
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5 votes

How have global sedimentation rates changed over the last billion years?

Big question. There is not enough data resolution at the moment, neither spatially nor temporally. There are geological periods thought to have undergone higher erosion rates based on the abundance ...
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  • 1,673
5 votes

Are craters on Earth covered by vegetation?

Erosion (especially), viscous relaxation, uplift, crust recycling (in the long term), volcanic activity, filling of the crater with deposits, and distortion by crust deformation (eg earthquakes) are ...
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  • 1,177
5 votes
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Are craters on Earth covered by vegetation?

Well the oceanic crust get recycled (through subduction), the oldest being only ~200 million year old, and the average, much younger. And on continents it is not just vegetation but dynamic processes ...
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  • 2,361
5 votes

The Dust Bowl: how's the recovery of all that topsoil going?

Soil is not a single uniform material. When wind erosion takes hold, as in the infamous 'dust bowl' of the 1930s, it is the uppermost A horizon, and to a lesser extent the B horizon that is mainly ...
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5 votes

Will the oceans swallow all of the land?

Interesting question. As long as plate tectonics persists, then, as @Arkenstein mentions, mountain building and ocean basin formation will create enough topographical variety to ensure that land ...
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4 votes
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How does the west coast of Japan have cliffs?

Why are waves from full width oceans critical for the formation of cliffs? There are many cliffs in inland regions, particularly, mountainous regions & escarpments along rivers. The sides of Table ...
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4 votes
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How large is the chance that the Badlands Guardian emerged from natural processes?

The chance that this occurs in this particular spot is indeed small. The chance that a natural face-like feature occurs somewhere on the earth's hundreds of millions of square miles of land area is ...
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3 votes
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How long will it take for the ocean to erode Rockall?

Impossible to give an accurate answer because nobody has ever studied rates of erosion of this kind of rock in such a setting. Typical long-term rates of cliff cut-back in an exposed position are 5 to ...
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