All Questions

ROCK ID: Heavy, reddish/orange with black, smooth layer from Oklahoma, USA

I have recently watched "How Many People Can Live on Planet Earth?" documentary with David Attenborough. In it, among one of the main factors that will limit total human population Earth can support ...

I was reading this article: https://www.cnn.com/2018/12/10/world/climate-change-us-coal-cop24/index.html Which basically says that the US is destroying our last chance at making real changes to stop ...

What is the timing of the rise of the Andes, especially if focused on the chronosequence differences among (Western, Central, Eastern) Cordilleras uplift.

Very heavy rocks. If you look close you see crystals inside. Not very reactive to hydrochloric acid. Not magnetic. Found together on the side of the road, at Chiltern, north east Victoria, Australia,...

CMIP5 offers natural-forcings-only simulations over 1850-2005, which allows comparison with the historical simulations, which allows us to show how anthropogenic forcings have affected the climate ...

gray stones with short small dark shiny lines all over it found on beaches of Newport Rhode Island

My understanding of the LAB is that it represents the point in the earth where the mantle undergoes a temperature activated mechanical change. The temperature of the boundary depends on the melting ...

I found this rock in Oregon as a boulder in the countryside. It almost looks like a cut of meat in pattern with white crystal look and pops of lavender it weighs about 25 lbs

Whats the largest earthquake since 1900 that was not in a subduction zone (not a megathrust). Wikipedia says that Since 1900, all earthquakes of magnitude 9.0 or greater have been megathrust ...

It has pretty even color - dark red rock with white snowflakes all over it. I found it in MA, near lake, where water seems to wash out the shore. The main block was too big to take (but I saw it), so ...

Soil testing from a well-drained soil sample in 0-15cm depth of a farmers field provides the following information: • Wet weight of a soil sample from a volume of 100 $cm^3$: 200 g • Moisture ...

This was found by a family member in Australia. Can anyone identify from the photo? I'm thinking Obsidian

Sedimentary rock phosphates contain much higher concentrations of potentially hazardous elements (As, Cd, Cr,Pb, Se and U)than igneous rock phosphates. Why? Is it because U concentration in magmatic ...

I'm trying to understand/reproduce/revise this chart in the Southeast section of the United States National Climate Assessment. The truncated scale for the bars is what caught by eye as a classic ...

A big iron meteorite hit Greenland, possibly hitting the ice cap https://en.wikipedia.org/wiki/Hiawatha_Glacier What would be the effects, and would there be big flooding ?

We have a well (about 1200KM away from sea and 60 meter deep), the water when taken out has slightly dark color and has smell. But strangely in about 12 hours the smell and black color vanishes and ...

cascading jade stone 50lb piece glows when bright light on it where do I go to get grade value and possibly sale this in Washington state

The Aral Sea was a major lake of the USSR until it suffered artificial changes, which began sometime no later than the 1960s. I am unfortunately not sure when major artificial changes began. ...

Please help identify the rock and what causes the light brownish 'nodules'

so this is my first time here because I need help in identifying the features on this rock formation. https://www.flickr.com/gp/158064920@N05/6USrY9 Thank you in advance.

Of metal and coal which is NOT made from fossil fuels. Coal IS fossil fuels, while metal is naturally formed.

I made a fire defense space about 100' by 50' behind my two level home on a 20% slope surrounded by old, tall pines. On July 14, 2018, I saw thin white jagged lines moving across the open space that ...

I found this while digging through piles of river runoff dirt/rocks that were removed after flooding from farm land. It was originally located in Central Iowa, Story County, USA. I am new to this but ...

NEW EDIT. I took a sharp knife and scratched at the orange/amber area. The area the blade tip went across would develope a faint white mark; however if I licked my finger and wiped the mark it ...

Following the commonly-known USGS definition of Water Year (or Hydrological Year) we know that it starts on the 1st October and ends on the next 30th September. Is this definition valid only for ...

When it comes to land or marine acquisition (oil exploration, for instance), I can see from literature that quality control (QC) is performed during the survey to ensure that the seismic traces ...

Have several of these animal figurines, MADE IN USSR on bottom. Can't figure out what type of rock it is made from. Any ideas?

I'm working with Well Logs and I want to calibrate my Vshale model with the clays from an XRD analysis that I have from the lab. There are muscovite and biotite, chlorite (secondary), detrital clay ...

In my old textbooks, granites used to be part of the metamorphic rocks. Is this still true or not ? If not fully true, to which extent ? Could someone point me towards clear examples or definitions ...

I'm looking to download a small geographic area of the CMIP5 models part of NASA-NEX dataset. Previously I relied on the Planet OS OpenNEX GDDP website which had a great tool for selecting geographic ...

Melted polar ice water makes the oceans deeper on average. The extra water on top of the oceanic plates makes them sink relative to the continental plates. This relative vertical displacement will ...

According to http://www.caverbob.com/wdeep.htm and http://www.caverbob.com/usadeep.htm, the only cave over 1000m deep in the US is a lava cave in Hawaii. In the continental US the deepest is 505m. On ...

That my first post : I'll try to follow the guidelines. 1) I provide 2 pictures of my sample : the first one from the tiny green crystals themselves, and the second one from the rock supporting the ...

How much speed of surface currents decrease in ocean depth? Approximately? I am wondering if there is any significant gradient within the top 30m ocean layer? Can this be theoretically calculated?

Background: I am taking a class in which I am the only student. Last class, I was called to go to the blackboard to build a conceptual daily streamflow model from historical precipitation data. I ...

I found this rock at the edge of a field near a fill dirt pile in San Diego, CA

Looking at the Earth system as a whole and considering ecological economics, net primary productivity and emergy are two concepts that strike me as fundamental and likely related. I'm not sure what ...

I have a bracelet with an unusual piece of polished stone, black with orange fossil-like inclusions. It would be great if someone could help me identify what this is. Many thanks! The back of the ...

I see some videos, in which big hole create in earth. It is most deep hole in which nothing see inside. My question is this, how this hole create? And why this hole in circle shape?

In the docudrama Super Comet After the Impact, the impact is shown to have made the air within a few miles of it unbreathable, and humans need gas masks to breath in this area. How realistic is this? ...

Hi I'm trying find out what kind of rock this is.... I have a chunk the size of akeg of beer looks like muddy coral on the bottom and coral like inside and agatized sponge or coral or something else ...

Found this rock in western Ireland among many other like this one, its scratch resistant to a stainless steel blade, its blackish with light green spots and some tiny Pyrite crystal inclusions, it ...

From the weather forecasting perspective: what is the main reason for showing just map of 500 hPa geopotential? Are there any practical or theoretical reasons? Why do not show 600 hPa geopotential or ...

If we were to make some technical jump to renewable fuel and renewable energy, would making plastics from oil release green house gasses, how much, and would plastic function as a carbon sink? Sorry ...

Why does CO2 cause heating in troposphere but cooling mesosphere? Can anyone explain this?

Hematite on Mars is generally thought to have formed either in pools of water or from volcanic activity. A comment to the answer to the question: How do hematite and magnetite form? states that ...

I have seen that height of troposphere is given as 8 to 16 km on various sites, but doesn't it also include the thickness of tropopause layer ? Tropopause is a layer with certain thickness where ...

We found a brown hollow rock in the woods in Sabine Parish, Louisiana , US. The tip of the rock had broken off, exposing the inside which is a black shiny rock. Someone told us that it may be a ...

There are a lot of reports on the consequences of climate change for the relative short term. From what I understand, in the next 100 years or so, we will face: global floods of coastal areas, ...