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9 views

Could you identify this for me?

Hi there. I found this rock on the coast of Somalia. Near the beach in the south of Somalia. It weights pretty heavy. It has a bluish and yellowish colouring. It is hard. It has ridged edges. And it ...
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1answer
16 views

What might be causing this rainbow-like effect on the ground?

The BBC News article Iceland's Okjokull glacier commemorated with plaque about a dead glacier speaks for itself. However there is a photo in the article that caught my eye. It shows mountains in ...
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1answer
13 views

Tornados from dust devils

Maybe tornados form from dust devils that get pulled into the storm. Is there some way to look for a correlation between number of tornados on a given day and how conducive conditions are to producing ...
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0answers
10 views

What is this rock in the river bed? [on hold]

This rock was found in a river bed in Washington Sate. The exterior is course red and flakes off in pieces from the size of a grain of sand to small pebbles. The center is gray to almost black and ...
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0answers
8 views

Help me ID this item found in a car park [on hold]

I found what I thought was a granite chip.It is in fact metallic, it is magnetic with a density of 7.3 g/cm . It looks natural. Interestingly 2 surfaces are flat and with extrapolation form an exact ...
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0answers
14 views

Help me identify the “brain rock” [on hold]

This rock has been in my family as long as I can remember. We always called it the “brain rock.” It was my grandma’s and I have no idea where it came from (sorry!) I live in the mountains of western ...
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0answers
15 views

Is it possible to know what was the flow direction in a pegmatite dike?

The following picture (Painted wall cliff in the Black Canyon of the Gunnison National Park, Colorado, USA) shows a pegmatite dike: is it possible to tell what was the flow direction? From thin (see ...
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0answers
14 views

Identify my rock [on hold]

I got this rock years ago in California. I have always wondered what it is. Please help me identify it! Thanks!!
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2answers
35 views

Has the present rise of CO2 ppm been proved to be caused by human activity?

The level of CO2 in the atmosphere has risen roughly from 300 to 400ppm over the last 60 years. What are the reliable calculations showing that such a rise has been caused by human activity? I am ...
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1answer
21 views

Flint nodules with fossil sand: How are they formed? [on hold]

a flint nodule>that is blackish, with green moss, looking stuff here and there on it (2inchs wide) (2 inches across) its been cut in half, .(the outside is 3 inches from end to end) inside is Sandy ...
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1answer
12 views

Zoeppritz equations derivation

I have been long looking for the derivations and step by step explanation of Zoeppritz matrix but either internet is full of final versions or I can’t find it...I would be very thankful if anyone can ...
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1answer
14 views

What does a “closed basin” mean in groundwater terms?

This answer talks about a "closed basin" that has an outflow to the sea. I had previously assumed that "closed basin" meant the same as "endorheic basin", but that is obviously not the case. What is ...
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1answer
46 views

Can aerostats be used for fine-grained control of the weather

Most of the discussed geoengineering ideas aim to change the average temperature of the earth instead of trying to control local weather. Aerostats can be used to change the local temperature in ...
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1answer
22 views

Community change along urban rural gradient

I was wondering whether someone has an idea about how to investigate community changes of plants/animals along an urban-rural gradient? I have a large data set consisting of plant/animal abundance and ...
2
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1answer
38 views

What is the lowest latitude for which if the ideal solar energy received each day for a year is graphed, the graph would contain one peak?

I asked a question with the same meaning on Quora, but it seems no one got it, so I'm asking it here with a very different wording. I'm actually not sure if this would belong here or on the Astronomy ...
2
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1answer
27 views

Is it feasible to 'harvest' the Clathrates from the permafrost before they evaporate?

We can see that there are large buildups of methane clathrates in permafrost regions. Climate scientist James Hansen has predicted that the release of the permafrost methane clathrates could cause ...
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1answer
62 views

Do atmospheric rivers ever contain liquid water in large quantities?

According to an episode of UK panel show QI, the largest rivers on Earth are in the sky. I assume they were referring to atmospheric rivers. According to sources I found, this is just water vapor, so ...
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0answers
60 views

Temperature rise in due to explosion [on hold]

How much would the mean temperature of a volume of atmosphere (12,310 km2 at the ground) rise due to a 63TJ explosion?
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3answers
37 views

Impacts of high-altitude emission of greenhouse gases (GHG) compared to sea level GHG emissions

I often hear that the emission of greenhouse gases (GHGs) by planes is particularly concerning because the emission of GHGs at high altitudes has an even higher impact on global warming than the ...
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1answer
26 views

Is there a general equation to know how big of an area is affected by an earthquake?

If you visit USGS earthquakes listing, you get 3 points of information for each earthquake: Location, depth, magnitude. My question is, is there a way to approximate how big of an area is affected? ...
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0answers
13 views

How to Obtain an Accurate Estimate for the Pressure of a Putative H2 and He4 Primordial Atmosphere?

How can we obtain an accurate estimate of the pressure of the hydrogen and helium primordial atmosphere of Earth just after it was formed? I was admonished by a user on Astronomy Stack for saying it ...
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0answers
35 views

Help naming unknown rock never seen one before [closed]

Kind of blackish shapped like a acorn it's been cut in half inside looks like packed sand unknown rock. dark and kind of lite.
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0answers
17 views

Help naming unknown rock [closed]

it's dark and kind of lite it's been cut in half and the inside looks like sand
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0answers
25 views

Why did Hurricane Harvey have so much lightning associated with it?

Hurricane Harvey was a prodigious lightning producer when it hit Houston/SE Texas. But I thought hurricanes don't have much lightning (with the eyewall being the only exception), due to tropical ...
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1answer
53 views

Cooling the planet during winter [closed]

I have a theory that if you add particulate matter, like dust, to the oceans, it would heat the ocean, but if you do it during the winter it would lead to evaporative cooling, from evaporation of the ...
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0answers
33 views

Have Russian Drilling Operations in Lake Vostok Succeeded Yet?

A couple of years ago the Russians began drilling through about 2km of ice to reach Lake Vostok in Antarctica. It was hoped that they would find living organisms there which had ben entombed under the ...
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0answers
53 views

Please anyone help ID the weirdest rock Ive ever collected [closed]

I found this rock digging around at a potential gold vein in the four corners area on the nacimiento plateau. It was not at all buried, just sitting on the surface half-stuck to some sandstone ...
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0answers
27 views

Stone identification help needed [closed]

I found this stone from The Giant Sand Dunes in Cape Reinga, Northland, New Zealand. There were quite a few of the same kind of stones on that specific spot, but just ended up picking this one and ...
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0answers
23 views

Tumbled rock identification help [closed]

clear with greenish tint white and dark green Found at a surf shop. Any help would be awesome!
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0answers
21 views

Semi precious tumbled stone help [closed]

jasper?? tan and blue amethyst?? another Jasper?? tannish pink with a red/dark pink line blue and gray mossy agate?? black and gold All of these were bought at a surf shop and were marked as semi ...
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0answers
39 views

Rock ID: strange infrared mark on brown rock [closed]

I found this pebble in Montenegro, it was lying on the beach. I have never seen nor find a pebble with this kind of pattern. There are a lot of same pebbles, but withous mark. 42.205578,18.940362 I'm ...
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2answers
45 views

Is there evidence to suggest that the release of methane clathrates in permafrost regions will impact climate change?

We can see that there are large buildups of methane clathrates in permafrost regions. Climate scientist James Hansen has predicted that the release of the permafrost methane clathrates could cause ...
0
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1answer
23 views

Definition of Surface-based atmospheric duct

I am writing a literature review for a project and I have a problem. Namely, I cannot figure out the the condition required for surface-based duct to occur. Literature does not help either. In one of ...
2
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1answer
29 views

Can a rock have a Vp of less than 1000 m/s and need blasting to excavate?

I have run a 60 m refraction seismic line on a mountain summit. The environment was noisy (wind would be the principal agent) and quite difficult to pick first arrivals. It resulted in 800 m/s. A ...
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1answer
28 views

Can someone help identifying this rock? [closed]

The rock is about 10" in diameter. I don't know anything about it, It was given to me by a friend. (https://i.stack.imgur.com/T84Fr.jpg)
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1answer
17 views

Is it reasonable to approximate the swinging building (base of the building) during an earthquake to a simple harmonic motion?

I am thinking of making a model of swinging building during earthquake and study the methods to minimize the swinging. So does it even makes sense to approximate the swinging buildings (the base of ...
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1answer
28 views

Do we know how large deposits of methane clathrates were formed in permafrost regions?

We can see that there are large buildups of methane clathrates in permafrost regions. This seems different to the buildups of natural gas which fracking releases, which appear to have just come from ...
0
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1answer
46 views

What is the most optimal latitude on Earth for the generation of extreme maximum temperatures?

First question on this StackExchange, so here goes... Overall, reaching high temperatures is dependent on 2 factors: The (maximum) solar angle in the day. The greater the solar angle, the more ...
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1answer
40 views

What is this rock ? Meteorite? [closed]

I have a rock that I thought to be gold ore from gold flecks on exterior but found the interior to be some type of platinum appearance metal that's crystalized...its has zero ohms resistance and its ...
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0answers
21 views

What kind of rock this my son find in the Colorado river? [closed]

1: https://i.stack.imgur.com/HmpL4.jpgstrong text my son found this rock in laughlin nv in the colorado river, it weighs around 2 lbs
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0answers
32 views

Can anyone identify this, found in Montana .Found 30 miles from Beartooth mountains. Found many vary in size and color, from clear to brown & redish! [closed]

Translucent layered rock, more light hits the more color seen, lightweight for mist part. Have single layer to multiple layered, clear to brown to reddish.
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0answers
40 views

What is difference between an atmospheric model and a climate model?

I am wondering the major differences been an Atmospheric model and a Climate model? For example, Regional Atmospheric Modeling System (RAMS) versus Regional Climate Modeling System (RegCM). I recently ...
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0answers
93 views

Why does Australia not publish a North to South cross section map of the Great Artesian Basin? [closed]

The only cross sections of the Great Artesian Basin (GAB) are East to West. It would be interesting to know the geostrata of the northern area close to Papua New Guinea which is water rich since ...
2
votes
1answer
80 views

If today's Earth becomes warmer, how will it compare to the Earth of the Cretaceous period?

Most pessimistic scenarios about climate change predicts a global rise of temperature of several Celsius degrees over the course of the 21st century if no action is taken. While such a shift in ...
2
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1answer
35 views

Is there any possible future for high energy geophysics? If so how it is going to revolutionize our knowledge about Earth's interior?

How practice is to map/image the subsurface of the earth using the high energy particles like neutrinos? https://www.geosci-instrum-method-data-syst.net/special_issue2.html
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1answer
45 views

Possible cavern?

In eastern Ontario, Canada, there's a place where, when walking and stomping, you can hear a hollowness in the ground. The area is primarily igneous rock with many large boulders, and the spot in ...
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1answer
89 views

Could we sequester co2 by dumping forests in deep oceans?

We know that trees are the most efficient "tool" we have to get CO2 out of the air, but the problem is that most of their fixated CO2 will naturally reenter the carbon cycle through decomposition. ...
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0answers
27 views

Where are the magnetopheres weak points on Earth?

The picture below shows how a magnetosphere has defined points on the solid magnet and on the moon where cosmic radiation has a window, gap, or focal point. I'm not sure what to call these areas? ...
1
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1answer
83 views

Origin of Serious Wildfires

At a very rough estimate, what proportion of wildfires are caused by natural events like lightning? I am absolutely sure that in Europe, where there are often wildfires, the sun is never hot enough to ...
0
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1answer
18 views

Glacial extent variability during last glacial period?

Does anyone know an online source to illustrate glacial extent variability during last ice age, ca 120ky pb to 10ky pb? Most sources seem to concentrate only on the maximum, but apparently, there was ...

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