All Questions

0
votes
1answer
16 views

Is the effect of Earths position relative to sun large or small compared to CO2 level in climate change?

A recent answer by Camilo Rada for "What place on Earth is closest to the Sun?" inspires this question. He makes clear that significant changes in the wander of the earth through its orbit results ...
0
votes
0answers
17 views

Energy Density Calculation?

What I wish to know is how does one calculate the energy density of materials such as silicon. I was told that a way of finding energy density is through the calculation of stress-Strain Curve. ...
0
votes
1answer
13 views

Help me identify my rock

I need help identifying what kind of rocks these are. The first one I think is amethyst but not sue. The other one I'm pretty sure is a geode but I don't know what kind.
0
votes
0answers
14 views

Why the mineral composition of most sills/dikes is basaltic?

I'm studying from the Tarbuck-Lutgens, and in the dikes & sills section (chapter 4) it says that they are product of very fluid magmas, meaning that they are low silicate. I dont get how this ...
-4
votes
0answers
48 views

Cause of global warming [on hold]

What is the greater cause of global warming? Water vapour? CO2? Solar cycles? It seems to me that assuming it is CO2 is rife with alot of questions that are not answered.
0
votes
1answer
30 views

Please Help Identify My Rock

This rock is smooth, heavy and dark grey/black in color with white blotches which are different in shape and size and are also porous. It scratches by a knife and I found it in with many pails of ...
1
vote
0answers
22 views

Rock ID: black, white and orange, from Malaga, Spain

I picked up some very interesting rocks and pebbles on the beach in Malaga, Spain this summer. They are predominately flat and colored dark grey crisscrossed with stripes of orange and white. The dark ...
0
votes
1answer
31 views

What type of crystal is this?

I feel like it's clear quartz that had been ripped from a cluster. However, I haven't seen this before, so I'm not sure. Can anyone confirm or correct me?
57
votes
4answers
11k views

What place on Earth is closest to the Sun?

What is the location on Earth that is closest to the Sun? I've seen this question asked many times, and answered in varied and contradictory ways: The most common answer is “the summit of Chimborazo ...
2
votes
1answer
40 views

Does wind chill work in deserts?

Wind chill works by removing the layer of heated air around your body. However in a hot area, say a desert, wouldn't the air around be hotter than your body or at least much closer to it than cold air?...
7
votes
1answer
192 views

Continuous lightning for over an hour; is this phenomenon common and does it have a name?

A few months ago, I witnessed something off the coast of Florida that I have never seen in my life. From my apartment, from about 10PM - 12AM, I saw pretty much continuous cloud to cloud lightning. I ...
0
votes
0answers
7 views

Gamma-ray spectral measurements

What is the fundament of the mathematical algorithm called GammaPro used in normalizing K and U to Th in surface and aerial gamma-ray spectral measurements employed in prospecting petroleum in ...
4
votes
0answers
33 views

Do Tectonic Plates Merge?

I had a question concerning the nature of continental plates. When looking at the Eurasian Plate today, for the most part, there is one solid fragment of the Earth's crust. However, having had a look ...
4
votes
0answers
33 views

How do you tell if smoky quartz has been irradiated?

I want to purchase a piece of smoky quartz crystal, but am not sure if it is irradiated. Is there a way to tell if it has been irradiated? Thank you.
4
votes
1answer
35 views

Can someone identify this mineral?

I found this in a stream in Medicine Bow-Routt National Forest, Wyoming. One side (2/3 length) has a pointy pyramid with four faces; other side (1/3 length) has four faces but with with an edge ...
-5
votes
2answers
59 views

Variations in Gravity over Time

Is there any consensus about the conjecture that gravitational force on Earth may have changed significantly over geological time; and in particular in periodic increase associated with mass ...
3
votes
0answers
21 views

How do people determine initial ratio of the parent nuclide and daughter product in radiometric dating?

I understand that we have zircon crystals that prevent entering or leaving of nuclide or lead after forming. But how cand we understand what was the initial ratio?
0
votes
0answers
21 views

The minerals in this apart from quartz are? [on hold]

Rock found in creek near old volcanic site. Found 23/1/19
1
vote
0answers
19 views

Geological Differentiation: variables and size requirement

Geological/Planetary differentiation is one of those topics that gets glossed over in intro Geo courses. We know that differentiation occurs over deep time (and will never end) and is a result of the ...
0
votes
1answer
24 views

Artefacts in PERSIANN-CCS data

I downloaded PERSIANN-CCS for the region of Pawlowdar, Kazakhstan and this has stripes all over my downloaded data. For another AOI in Kazakhstan I do not have this problem. Does anyone of you have ...
0
votes
0answers
40 views

Need to Identfy this Large Rock with Gold Metal in Center of Each Crystal [closed]

I haven't been able to identify this large rock. Each crystal prism has what appears to be spot of gold or gold like color inside. What is it? Any help is appreciated.
2
votes
1answer
44 views

run the WRF model using ERA5

I want to run wrf chem with ERA 5. I followed this post https://dreambooker.site/2018/04/20/Initializing-the-WRF-model-with-ERA5/. Everything works fine unless I add surface pressure to surface data ...
-1
votes
0answers
31 views

Mystery rock help id [closed]

I found this in upstate south carolina creek .need help with ID.
3
votes
1answer
69 views

Circular rain cloud observed in rain radar

This circular rain pattern was observed in Sydney’s rain radar today. It remained for the entire loop, wiggling around a bit but mostly staying in the same place. The fact that it’s centred around ...
1
vote
0answers
94 views

Is this milky quartz a stone age tool? [closed]

I found this piece of quartz at Benbo Mt Co. Sligo Ireland.There are many Megaliths in this area in the Dartry Mt range.Its 3 inches in length and appears to have been fashioned as a tool.I found it ...
0
votes
0answers
27 views

Is this a stone age tool? [duplicate]

Found this piece of Quartz at Benbo Mt Co. Sligo Ireland, there are many Megaliths in the area where I found this. Its milky Quartz and 3 inches in length.It does look like it has been fashioned for a ...
0
votes
0answers
54 views

Could someone identify this rock please [closed]

I found these on a friends property on the Sunshine Coast, Queensland Australia in a known gold bearing creek .I dug these up .would like to know if anyone can identify gold in these rocks
-4
votes
0answers
40 views

Atmospheric dynamics [closed]

If the atmosphere was incompressible (density constant at all altitudes), 100 km thick, and had a surface pressure of 1000mb. at what altitude would the pressure be 250mb? Sketch the graph of pressure ...
0
votes
0answers
40 views
1
vote
0answers
33 views

What kind of rock/crystals are these? [closed]

I'm trying to figure out what this rock is. I've looked all over for a similar crystal formation and I'm coming up with a conclusion it's a type of geode but can't find any with a lot of cavities ...
2
votes
1answer
73 views

What type of rock is this? Found near Abiquiu, New Mexico near the top of a canyon

I found this rock while hiking down into a canyon near Abiquiu, New Mexico. There were a few others like it nearby. It is creamy white on the outside, and a translucent, bluish gray color on the ...
0
votes
0answers
28 views

Can you help identify this rock? [closed]

Hello Can anyone tell me what type of rock this is? I found it hiking a trail in North Carolina. It looks like there was so much pressure on it that it got smashed to bits and the over time quartz ...
2
votes
1answer
39 views

Fissure Energy/Force Equation

For this, I am trying to understand if it is a measure of force (Newtons) or energy (Joules ) of when fissures are created, Fissures are where the ground is being torn up either by volcanic ...
5
votes
2answers
53 views

How much climate history can be reconstructed using marine sediment cores?

Today I learnt in college that marine sediments can be used to reconstruct the climate up to 500 million years back. I find that number very strange because in another class we learnt that the ocean ...
1
vote
0answers
16 views

The DRASTIC groundwater vulnerability model and it's relevance today

I am reading a groundwater pollution vulnerability study by Mark Angle of the Ohio Dpet. of Natural Resources (ODNR) for my county. The model used to assess the groundwater vulnerability for the ...
6
votes
1answer
116 views

What is the nature of the “unexpected geomagnetic pulse that took place beneath South America in 2016”?

Popular news has several articles linking back to the news article in Nature Earth’s magnetic field is acting up and geologists don’t know why which discusses the need for an early update to the World ...
3
votes
1answer
145 views

What is this yellow stone

I found this yellow stone in a creek.It was easy to break by slamming it against another stone and has evenly spaced crystal clear grains.They are very clear that under the sun I thought that water ...
1
vote
1answer
44 views

Help identifying rock please

I have this rock that was given to me as a gift a few years ago but I have no information on it. I would like to find out what kind if rock it is. Can anybody help me figure that out please??
0
votes
1answer
49 views

Glowing Orange lakes seen from airplane at night

I recently observed a phenomenon during a nighttime flight over upper Midwest of USA-specifically over Marquette, MI. In what is a lightly populated area, I observed several very large rectangular ...
2
votes
0answers
36 views

Difference between landslide waves and earth quake waves

I am new to this field, recently started working on landslide monitoring mainly in signal processing part. I have the following questions? 1.Will each land slide and every vibration have p wave, s ...
-6
votes
0answers
75 views

Why do ''climate experts'' from the UN/IPCC never mention Grand Solar Minimum?

I've read many papers about Grand Solar Minimums and Glassberg Minimums, known to science for very long time, studied and monitored with much of our Public Funds. History shows solar activity is the ...
0
votes
0answers
24 views

What is the toughest rock?

I wonder which rock is most resistant to being cracked apart by a hammer, in other words, what is the toughest rock? What rock is most difficult to mine through? Hardness is different than toughness, ...
4
votes
1answer
50 views

What kind of temperature unit is “cK”?

An article about ocean temperature history/modeling has this plot: Where the units are given as cK. cK does not seem to be a ...
1
vote
0answers
48 views

How can I convert a CERA-20C total precipitation dataset of "monthly means of daily means' (edmo) to mm/month?

I downloaded an edmo dataset of 1 ensemble of the cera-20c model. I want to convert these data, which are in [m], to mm/month. Further specifications: 0.125/0.125 grid, -29/30/-30/31 area. Example of ...
0
votes
0answers
25 views

Government collects environmental protection charges. Why? [migrated]

I am reading up on Environmental Impact Assessments (EIAs). I have learned that for every project an EIA is to be done after a careful assessment which includes screening, scoping, impact prediction, ...
0
votes
0answers
29 views

Tool to retrieve coordinates from SVG file [migrated]

I have an .SVG file of a map with known extreme North/South/East/West coordinates of the area, and I'm required to retrieve coordinates of certain points on it. What free/freeware software tools, ...
1
vote
0answers
19 views

Computation of absolute precipitation forecast from precipitation anomaly forecast in NOAA CFSv2

I am currently trying to use absolute precipitation forecasts for medium term range (3wk-2mth). As no models of NOAA have absolute precipitation on this timerange, my idea was to compute those ...
5
votes
1answer
811 views

What is this spaceship-shaped cloud?

This tweet from the European Space Agency (ESA)'s Spanish account show a striking photo of a round, flat, "space-ship-shaped" cloud in an otherwise completely clear sky. The stars are out so I assume ...
5
votes
1answer
68 views

What caused those colorations in bedrock?

I took those photos in a hurry (sorry, the color is a bit off due to low light, the first picture is the most distorted one). It struck me that the discolorations seem to follow the fissures in the ...
0
votes
2answers
81 views

What happens if it rains above the boiling point of water?

The freezing point of water is 32°F. If it rains at a temperature lower than that, it will snow. However, let's say we dig a deep hole not filled with water that goes like 10,000 feet below sea level. ...

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