All Questions

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 ...

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 ...

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 ...

(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 ...

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.

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 ...

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 ...

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 ...

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 ...

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 ...

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

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 ...

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 ...

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 ...

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 ...

Would anyone be able to identify this rock?

I know that volcanoes and earthquakes occur on plate margins. But, do some of them also occur within plates?

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 ...

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 ...

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 ...

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 ...

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 ...

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

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.

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 ...

I need some helps, I have SEM image and EDX data, How can I identify Mineral from SEM image and EDX?

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:

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)?

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 ...

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 ...

Found these whilst walking around Warwickshire please could you help.thanks

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 ...

Is there somewhere a map which indicates which areas and cities become sea?

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 ...

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 ...

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. (...

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 ...

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 ...

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?

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?

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 ...

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

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 ...

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 ...

I want to include color bar for my plot. I have done the plot using the following code: ...

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, ...

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....

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.

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?

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 ...