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1500 questions
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Canadian equivalent to AMLIS database?
I am interested in in situ coal fires. In furtherance of this, I am hoping to find a database of Canadian mine reclamation sites, complete with incident or status reports and descriptions of specific problems.
I've poked around a very small bit in…
Mayor of the Plattenbaus
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Why is there a bend in the Lomonosov Ridge?
Why is there a bend in the Lomonosov Ridge?
This is a supplementary question to that asked by Sabre Tooth in What is the tectonic explanation for parallel ridges in the Arctic ocean
Fred
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Deuterium-less oceans
Current fusion reactor schemes require deuterium and the plan is to extract it from the ocean where it can be found in small abundance. Does deuterium serve some purpose in the oceans? What would happen if there was none left?
cpc333
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How are organic walled microfossils preserved in the fossil record?
Organic walled microfossils have no hard mineralised parts, how are they preserved in the fossil record?
Siv
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Equatorial bulge and tectonic plates
It is well known that the Earth is not a sphere, but rather it bulges at the equator. Also it is well known that the Earth's crust is composed of 7 or 8 (depending on definition) major tectonic plates, which are able to move on top of the…
Kenshin
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How do we determine subsurface composition?
Let's assume that a seismogram $s(t)$ is the convolution $s(t)=r(t)g(t)$ between a source signal $r(t)$ and propagation effects $g(t)$. If the source signal $r(t)$ is known, then we can obtain the propagation effects using a Fourier transform; that…
Paul
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Why does the meandering pattern of the jet stream itself propagate?
It is well known that the jet stream follows an overall meandering pattern, but what is less well known is that this meandering pattern itself moves as a wave with a velocity much slower than the velocity of the jet stream itself. So why does this…
Kenshin
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Is there conclusive evidence for the Antarctic Circumpolar Current developing after the glaciation of Antarctica?
The Antarctic Circumpolar Current (ACC) is the continuous oceanic current that encircles the Antarctic continent, as is often explained in the literature as being the cause of the onset of glaciation in Antarctica.
However, a study in 2013, in the…
user889
11
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2 answers
What precursor geological activity occurred prior to the Parícutin Volcano eruption in 1943?
Parícutin Volcano, sometimes referred to as the 'A Volcano Born in a Mexican Cornfield' (which is also the title of a book published in 1993, more information here), was one of the most well documented and observed volcanic eruptions in the…
user889
11
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0 answers
Intuitive explanation of precipitation amount
I'm trying to learn how to make sense of numbers in a forecast. I can interpret temperature and wind speed, but I don't know what to make of rainfall. What does it mean, for a human, that there will be (for example) 0.5mm precipitation? Is it a lot…
Jan van Bloem
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What is the oldest sediment?
Sedimentary rocks in Akilia or at Hudson Bay have been proposed as the oldest in the world. My question is not related to rocks, but rather to sediment while still forming sedimentary deposits but before lithification (rock formation). While it…
arkaia
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11
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What is the tectonic setting for the formation of the Great Dividing Range in Australia?
Australia's Great Dividing Range is the largest mountain range on the continent, running down the length of the eastern part of the continent, as shown in the Geoscience Australia map as a dark line, below:
The tallest peak in the range is Mt.…
user889
11
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1 answer
What tectonic structures exist on the Eurasian - North American plate boundary in eastern Siberia?
It is reasonably well known that the North American tectonic plate includes a portion of eastern Siberia. What is often typical in plate tectonic maps is that the actual plate boundary is often drawn with a degree of uncertainty, for example, the…
user889
11
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1 answer
When did/will peak conventional oil happen?
Global oil reserves are, for practical purposes, limited. We're using them at a rate far exceeding the rate of deposition. At some point, we will have to spend more energy to extract remaining reserves than we get back from burning them (extraction…
naught101
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Olympus Mons sized volcano on Earth?
The shield volcano Olympus Mons on Mars has the distinction of being the most massive single volcano in the solar system - this volcano, according to NASA, is 25km high with a diameter of over 600km - with a base that would cover the American state…
user889