0
votes
0answers
16 views

Need help identifying this rock

I need a little help identifying this rock. It was found somewhere in the Sahara Desert. It is very hard and leaves a beige streak on a steel file (might be the concretized dirt covering it). The ...
0
votes
0answers
14 views

Endogenous Theories For the Origin of Earth's Water (Dry/Wet Accretion?)

I have really two questions: (1) what evidence is there in favour that the majority of Earth's water formed with the planet. (2) what evidence is there that the majority of water did not form with ...
3
votes
0answers
21 views

Why is the atmospheric pressure in a tropical cyclone lowest in the eye, even though it contains sinking air?

The lowest atmospheric pressure in a tropical cyclone is generally located in the eye at the center of the cyclone; however, the air in the eye is descending, while the air in the surrounding portions ...
1
vote
1answer
25 views

Are there resources for determining what percentage of the earth's surface is occupied by air conditioned spaces?

(I was told this belongs here instead of where it was originally posted) I am exploring some ideas regarding the impact of urbanization on the climate and our environment. My basic thought process is ...
0
votes
1answer
29 views

Rock/mineral identification - smooth black inside

It’s yellow and grey on the outside but smooth and black on the inside. Very roughly 2.27 g/ml Just curious, it almost like sea glass on the inside but it’s far too dense.
2
votes
0answers
29 views

Hourly solar radiation estimates on a horizontal plane, preferably in R

I'm looking to estimate the temperature at the end of a river reach of a few miles in length based on known (measured) temperature at the start of the reach plus weather information: historical data ...
2
votes
1answer
32 views

Would a nuclear explosion over one of the Earth’s magnetic poles momentarily disrupt/weaken the Earth’s magnetic field?

If say the Tsar Bomba had been detonated directly over one of the Earth’s magnetic poles at ground level, would the nuclear electromagnetic pulse generated from that blast have had any momentary ...
1
vote
1answer
20 views

Mineral identification; black & metallic

During a recent trip to the Portuguese island of Madeira, I found a couple of interesting rocks on a beach. Both the rocks pictured in this question contain the same black mineral. I first guessed ...
0
votes
0answers
17 views

what is this round black rock contained in sandstone [on hold]

Wondering what this rock is, found in the spring mountains near las vegas nevada. It is a hard smooth feeling black rock which appears to be surrounded with sandstone, the black rock goes all the way ...
8
votes
1answer
73 views

Lake outflow forming a “reverse delta”?

While rivers often form a delta when they flow into a lake, the outflow of a lake is usually a single stream. Are there lakes where the water flows off in multiple channels that merge into a single ...
0
votes
0answers
20 views

Can someone help identify this stone please [on hold]

I have numerous rocks that are in need of identification, and hoping someone knowledgeable can help! In rough form it’s a metallic blad almost waxy, and some show red or green underneath
3
votes
1answer
61 views

Is it possible to estimate the size of a meteorite from its remains?

I live near this ophiolite (Sasso di San Zanobi, Firenzuola) and they used to say it is a meteorite. There is no evidence of a crater but let's pretend it is the remain of a meteorite: how big would ...
0
votes
1answer
40 views

Help me figure out what this purple rock is

I found this in the ground at a job site in blue springs mo . Its purple with darker purple lines through it like growth marks on a tree. It is about the size of a large loaf of bread 7 inches across ...
0
votes
0answers
27 views

Geological work of rivers and glaciers [on hold]

I'm new to new this platform of Earth science, I'm studying for an entrance exam in geology in my country. I wish to learn through this stack exchange also. Thanks... Question: what would be ...
1
vote
1answer
30 views

Can someone help me identify this crystal

So the actual rock looks black but I put it up to the light n I see green n black.... can you help me figure out what it is ? my grandfather gave it to me years ago n I’d like to find out more about ...
0
votes
2answers
49 views

Hi, I'm hoping to identify this rock.

Would anyone be able to identify this rock?
4
votes
1answer
125 views

Why do some earthquakes and volcanoes occur within plates?

I know that volcanoes and earthquakes occur on plate margins. But, do some of them also occur within plates?
6
votes
1answer
63 views

Geological evidence about climate change: has there ever been a period with a rate of climate change as great as it is today?

Most statistics about climate change are based on climate data over the last 150 year (as long as records have been kept). This seems irrelevant in terms of the geological time scale of temperature ...
0
votes
1answer
26 views

Could further oil drilling remove an insulation layer of the Earth cores heat? [duplicate]

Putting aside burning fossil fuels, what are the consequences of another 100 years of drilling deeper and deeper to extract oil reserves globally? Would this significant extraction remove an ...
6
votes
2answers
47 views

Why are pole reversals not more detrimental to life?

This question is linked to the following question, and has two parts. Mars interdicts approximately 40% of the radiation (per square meter) of the sun that Earth does. It has been claimed that Mars ...
0
votes
0answers
29 views

Another mineral inside this Rainbow moonstone?

I got this rainbow moonstone from Jaipur, India. The front and back are polished, has black tourmaline around it’s edges, and is 25x28mm. I didn’t notice it when I bought it but It seems to have ...
5
votes
3answers
52 views

Why are the mountains predominately grey or dark brown?

Observing many photos of mountains one can assume that most of the mountains are grey or brown. See also the mountain article at Wikipedia. There are however several ways a mountain can form, which ...
0
votes
0answers
26 views

Help with identification

I'd appreciate it if someone knows something about this rocks. This is new for me so I'm like a child :) but they are so beautiful. From Bosnia, place was cemetery in WW II. Thanks
0
votes
0answers
27 views

Can anyone help me figure out what kind of rock this is?

I was cleaning out my basement and I found this wrapped in a cloth inside a tin case. Does this rock hold value? What is the geological history of it? I'd really appreciate insight on this.
1
vote
0answers
15 views

Agricultural self sufficiency after yellowstone eruption?

Given a 440 acre farm running roughly 200 acres of Crops and 40-50 head of cattle,in the secondary ash zone within the lake of the ozarks reigon of Missouri, how viable would survival be relying on ...
0
votes
0answers
16 views

Identify mineral in SEM image and EDX [closed]

I need some helps, I have SEM image and EDX data, How can I identify Mineral from SEM image and EDX?
0
votes
0answers
22 views

What type of lightweight “stone” is this?

This is lightweight compared to almost any other stone I've held. I found it in Michigan, in sandy soil about 24" deep. Broken side:
5
votes
2answers
54 views

Is it possible to create clouds by pumping water into volcanoes?

Suddenly, there is this idea in my mind that if an important effect of global warming is rainfall reduction and drought, is it possible to use volcanoes as water vaporizers (regardless of costs)?
2
votes
1answer
17 views

How we can find hot spring genesis time?

Is there any way we can calculate the time when a particular hot spring come into existence? Also I wanted to know what is average time period for a active hot spring in general, whether it can flow ...
1
vote
0answers
46 views

Where on Earth does the atmosphere have the most $O_2$ concentration?

Is there a map that shows the average oxygen concentration in the atmosphere? Seems to me that it would be where the most plants are but I wonder if population and industry make a difference in oxygen ...
0
votes
1answer
36 views

Could you help me identify these rocks please

Found these whilst walking around Warwickshire please could you help.thanks
6
votes
1answer
59 views

Why is there no desert in Southeast China?

Arabia, Sahara and Southeast China and India all are on the tropic of Cancer yet Southeast China and India are not deserts. I know that India is not a desert because of monsoon wind which causes heavy ...
5
votes
2answers
45 views

How would Earth map look like if all ice melts?

Is there somewhere a map which indicates which areas and cities become sea?
1
vote
1answer
30 views

Water vapor content versus specific humidity

I am wondering the difference between water vapor content and specific humidity to determine the moisture availability in the atmosphere. Which one is more acceptable variable to determine the ...
2
votes
1answer
66 views

Sun and moon anomally

Below is a photo that my son took in Scotland showing the sun and moon at the same time. I immediately noticed this anomaly that the light illuminating the moon could not possibly come from the sun. I ...
9
votes
2answers
716 views

Why do rivers sometimes travel down the opposite side of the mountains from where the rain happens?

My teacher explained that when wind coming from the ocean gets blocked by a mountain it makes rain on one side of the mountain, like in the image below. This rain leads to the creation of rivers. (...
-1
votes
0answers
22 views

Why does the hardness of Cu & Al vary?

I know the a mineral's hardness is determined by its bond strength and crystal lattice.I know that both Cu and Al have FCC structure but how do we predict its difference in harndness with close ...
0
votes
1answer
34 views

What is this heavy rock having gold-olive colour and tiny gold coloured crystals?

The rock is very heavy, about 1.2 kg and 5 inches (~ 13 cm) long, gold–olive colour. The back has tiny gold coloured crystals and the front has bigger ones as seen in the picture. I don't really know ...
0
votes
2answers
34 views

I believe we got this rock in the mountains of Creede Colorado

Solid, has some weight to it, looks like it possibly has some purple amethyst on the opposite side, but mostly consists of this silver: Can anyone identify it as silver?
6
votes
1answer
61 views

What is the oldest fossil on Earth?

What is the oldest fossil ever found on Earth? Where and when was it found? What was the oldest fossil with a brain with 2 hemispheres ever found?
0
votes
0answers
41 views

Identify Crystal [on hold]

These are pictures of petrified wood just wondering if you could tell me what the round fools Gold looking crystals are I know the yellow crystles are Amber and was told the round Fool's Gold looking ...
1
vote
0answers
33 views

What is the angle between earth's axis of rotation and equator? Are they perpendicular or at 66 1/2 Degrees?

By rotational axis I mean axial tilt or Axial obliquity or 66 1/2 degrees tilt of earth to its orbital.
0
votes
0answers
23 views

What is the name of the rock and the minerals it contains?

This rock was given to me for mineral identification during my Economic Geology Class.Now , I have managed to spot some of the minerals here , but I am not too confident with my answers. The lab ...
0
votes
0answers
39 views

Is this an Agate? What kind? Or what kind of rock is it if not Agate?

It think is an Agate but not sure what kind of it is. As best as I can tell under the orange its really pretty. It is 21 lb. I found it at a rest stop out side of Yakima, WA, USA. But it does not ...
0
votes
0answers
17 views

Inclusion of color bar [migrated]

I want to include color bar for my plot. I have done the plot using the following code: ...
3
votes
2answers
30 views

What can one come to know about a mineral just by knowing name

I have been busy learning the components of various minerals for upcoming test....is there any way to predict the components or properties of a mineral just by knowing it's name? Eg: albite,augite, ...
1
vote
0answers
15 views

How to be involved in paleontolgy as a non-earth scientist

I want to be involved in paleontology or archaeology but I don't intend to go back to school for either. I am aware of some opprotunities to volunteer on field studies but am hoping for more resources....
0
votes
2answers
39 views

What type of yellow-green stone is this?

It's greenish yellow with white. Got it in a mixed stone package from Amazon. No luster, I'd say a 7 in hardness, it doesn't look homogeneous.
2
votes
1answer
56 views

Floating rock found in southern florida

I found the rock on the beach. It has a redish hue and floats on water. It feels as though it is hollow because it is light for its size. Does anyone have an idea what this is?
1
vote
0answers
49 views

Would the Gaia hypothesis have any practical use?

I recently stumbled upon the Gaia hypothesis, which briefly states that the Earth itself is a living organism. I am wondering: Would this hypothesis have any practical use? Does it make any ...

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