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1500 questions
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1 answer

What evidence is there linking melting ice caps and changes in tectonic movement?

Reading one of my other questions, How much would the Greenland landmass isostatic rebound contribute to long term climate change?, a subsequent question is what, if any, effect the isostatic rebound after ice cap melting would have on plate…
user889
8
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1 answer

What are the geological mechanisms for sea floor spreading in the Bismarck Sea?

The North and South Bismarck microplates (north east of Papua New Guinea) are separated by a ridge of sea floor spreading, as described in Oregon State webpage as The tectonics in this part of the world is very complicated. A spreading center…
user889
8
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1 answer

How are spherulitic structures formed in basalt rock?

After having studied the thin sections of basalt under the microscope, I have come across many spherulitic structures occurring in clusters. How can this happen? Is it due to devitrification or is it something else? What is the natural process…
Prashant Terkar
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What is the total Earth's interior energy budget?

What is the total Earth's interior energy budget? What is the heat flux per m2 that warms the Earth surface because of the Earthy's internal heat. How much of that heat is replenished from the radioactive decay? How much of that heat is…
Irigi
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Is Atlanta too far inland and too far above sea level to be affected by the comet in "Deep Impact"?

In "Deep Impact", the president says that "New York City, Boston, Atlanta, Philadelphia, all will be destroyed". New York and Boston are on the water and would be in danger from a tsunami of any size, Philadelphia is 39 feet above sea level and 50…
philosodad
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Is PhD the only way to study glaciers?

I am wondering if there are alternative ways to study glaciers apart from obtaining a PhD. I would be glad to build a career around glaciology, however, with the issues in regards to my PhD, a new Ph.D. with a supportive research group or a new…
kc_nul
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Was the Earth a lot foggier millions of years ago?

Quoting a sign in Redwood National Park: Redwoods once covered large expanses of the world. Millions of years ago some of these redwoods were preserved as fossilized trees when volcanic ash buried them. Over time, the trees absorb silica from the…
neubert
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How do you determine the % of precipitation falling as snow in the case below?

I have just started a course in hydrology (a totally different field from mine which is computer science) and I can't find the link between the fact that a river flows into a lake and the % of precipitation falling as snow. I'm really confused. Can…
narutoArea51
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Does the Moon affect earthquakes?

Does the Moon, through factors like its location (if it is at an apsis i.e closest point or furthest point in its orbit) or some changes in density, affect earthquakes on the Earth? Earthquakes are a consequence of moving tectonic plates. And when…
user27902
8
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2 answers

Is it possible for tsunamis to occur on deep water planets?

Assume a water planet with an ocean depth of about 200-500 km. Would a very strong ground-quake happening at the very bottom of the planet's ocean floor be able to cause a large tsunami to rise up to the surface of the ocean? If it could, how strong…
ZanMoon-chan
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Do the large forests remove CO2 from the atmosphere?

Thomas L. Friedman, the New York Times columnist, wrote yesterday: These intact forests — from those in the Amazon and Congo River basins to ones in Canada, Russia and Ecuador — are the world’s life-support system. They sponge billions of tons of…
Peter - Reinstate Monica
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Paleogeographic atlas software

I am looking for a paleogeographic atlas software, like the one used here at min 10:15: you can navigate through the ages with an arrow and visualize a reconstruction of the geographic features of any area of the world in a certain age: Has anyone…
Self-teaching worker
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Are there measurement techniques that can help determine the exact geometry of a volcanic vent?

In a previous question What happens to the higher frequency content of the tremors associated with a volcanic eruption?, I asked about the high(er) frequency content of a volcanic eruption. In the same vein, I'm interested to know more about the…
jonsca
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What causes a volcano?

Inspired by the question, How does one measure what causes earthquakes?, I'd like to know what causes another great geological phenomenon - volcanoes?
Kenshin
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Explanation for contrail with a dark line

I have recently taken a picture while on a walk, which is showing a phenomenon I cannot really find an explanation of. A contrail was visible in the air, backed with a dark line that went all the way to the ground. The dark line was visible only for…
Buntes Lama
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