All Questions

0
votes
0answers
8 views

Found this, need help identifying

River rock found in australian riverbed, crusted in some sort if quarzlike crystals, when smashed revealed yellow/ green rosette shape crystal pattern & little round chambers with clear crystals
1
vote
0answers
15 views

Coral Reef and Volcanic Islands

I have two questions regarding coral reef and volcanic islands. When a new volcanic island is formed, how much time should pass in general for coral reef to start form around the island? Another ...
0
votes
0answers
13 views

Help identify my rock please?

found this in the backyard, any ideas which type it is?
0
votes
1answer
19 views

Is this a petrified reptile?

River rock from colorado with snake pattern is this a reptile?
0
votes
1answer
14 views

UK Mineral identification help

Can anyone help me identify these minerals please? I found them on a beach in northern England. The first has tiny angular crystals, some slightly pinkish maybe in certain lighting conditions but grey ...
0
votes
0answers
14 views

Identify this rock [on hold]

please identify this rock. I found it on a Maine beach.
2
votes
0answers
22 views

Is there a place where the sea floor descends into the mantle of the earth?

My understanding of plate tectonics is that in the middle of the oceans magma rises from the mantle of the earth, cools and then spreads out, building up the sea floor. These places are pretty obvious ...
0
votes
0answers
20 views

Can you please help me to identify this thing I found inside a rock in the Almanzora riverbed Spain

Can someone please help me identify this thing I found inside a rock in the Almanzora riverbed Spain
1
vote
0answers
27 views

Characteristics of saddle points in stream line charts

I am trying to locate saddle points or commonly known as "col" in synoptic meteorology. This is "z" in the following figure. References Here are some of the references regarding this. a). http://www....
2
votes
0answers
18 views

Monte Carlo Simulation for Tropical cyclone passage frequency: Using R/Python

I want to implement a statistical test by the following paper in R: https://journals.ametsoc.org/doi/full/10.1175/JCLI4217.1 Details The above paper calculates the significance of the difference in ...
4
votes
0answers
21 views

What exactly are “ambient aerosols”?

I see this term being used everywhere, but I have not been able to find a formal definition for "ambient aerosols".
2
votes
3answers
63 views

Looking for counter-arguments concerning the melting of glaciers in the alps in the context of global warming

I've recently listend to a talk of Prof. Gernot Patzelt, Austrian Geographer and High Altitude Mountain Researcher. In this talk he describes that scientists find rests of trees and moorland apearing ...
0
votes
1answer
62 views

What rock is this? (found in fields)

Found it in fields today. Just plain field and earth for growing with low elevation. No clue what rock this is. Maybe even some metal? 14cm x 10cm Weighs about 1kg 5-6 Mohs hardness After cleaning ...
0
votes
0answers
9 views

3D fold coverage calculation

I have a configuration for which the nominal fold is 16 (i.e. 48 channel streamer, 1m group interval, 1.5m SP interval). I have been asked to calculate the fold coverage with the following criteria: ...
1
vote
1answer
24 views

If matter is constantly being cycled through an ecosystem, does that mean a given ecosystem has a fixed mass?

Due to the food chain and the cycle of life, matter is constantly moved between plants, primary consumers, secondary consumers, and so on, until the consumers die, giving matter they consumed back to ...
2
votes
1answer
38 views

Locating shearlines or deformation zones in a map

I am looking for a way to detect shearlines or confluence regions such as that shown in the figure below (red dashed line). I was able to derive the stretching, shear, and total deformations. The ...
1
vote
0answers
22 views

How to transform level 2 satellite retrievals to level 3 gridded data

Usually, I use level-3 gridded satellite data to analyze the spatial and temporal patterns of atmospheric compositions. However, there were some data sources which only afford level 2 product. For ...
4
votes
0answers
18 views

Is there a widely accepted reason for the formation of tafoni?

Expansion of tafoni seems to be based on weathering (seems reasonable enough.) But what creates them in the first place? There are a number of explanations online (Wikipedia lists eight plausible ...
0
votes
0answers
19 views

Any thoughts about this? Fossil? Some sort of relic. Bone? [on hold]

Found in northwestern Oregon. Willamette valley.
0
votes
0answers
15 views

What is an inversion

What is an inversion? What happens to the sediment in between? I understand that as the crusts move together a bulging appears.
0
votes
0answers
10 views

Moisture flux convergence/divergence calculation in Grads

I want to calculate moisture flux divergence/convergence in 850 hpa for the summer and I have monthly mean gridded data sdfopen shum.mon.mean.nc sdfopen uwind.mon.mean.nc sdfopen vwind.mon.mean.nc ...
1
vote
0answers
19 views

Which is worse, plastic or styrofoam cups?

Which disposable cup between plastic and styrofoam harm the environment the most? Which is the most unhealthy to drink from?
3
votes
0answers
34 views

Is sterescope still used to do cartography with orthophotography?

I used this tool at my degree a couple of lusters ago to do cartography with aerial orthophotos. We used it on cartography and geomorphology subjets. Source: gumtree.com The method consists ...
0
votes
0answers
23 views

Estimating Diurnal Temperature Changes for a region due to Climate change?

I am working on UHI related studies. I am wondering is it possible to estimate how diurnal temperature cycle would change for a typical day of given season. Edit: Based on comment I am trying to add ...
2
votes
0answers
34 views

Is it an egg? What type of rock please? [on hold]

This stone was found by my uncle in Western Queensland. It’s light brown in colour and smooth. It's very heavy for its size. 780 grams. Pocket knife doesn’t scratch it. many thanks.
1
vote
0answers
14 views

Turbulence strength from turbulence intensity?

I do not have a lot of knowledge in aerodynamics but I need to be able to derive turbulence strength (Cv2 and Ct2 - so called turbulence structural parameters I think) from turbulence intensity. Does ...
1
vote
1answer
40 views

Help me identify my rock is it jade?

Found this rock it looks like a vein of Jade but I have no idea. This is the inside of the rock. I found it already broke the rock is wet in the pic. It's is a hard rough texture and the green in the ...
0
votes
2answers
42 views

Error trying to download ERA5 data: Exception: Missing/incomplete configuration file: C:\Users\username/.cdsapirc

I am new with Python so please be kind. I want to download data from ERA5 and so far I have installed the CDS API package and followed all the instructions from https://cds.climate.copernicus.eu/api-...
9
votes
0answers
80 views

Rock identification?

This stone is part of a rock mass found in one of the plains of Iran. There are no rocky mountains around these rocks. I'm geologist and I guess it's part of the meteorite, what do you think? Color: ...
3
votes
0answers
29 views

Amount of scattered vs. direct UV light from the Sun

I was wondering about the common saying that on a sunny, cloud-free day, depending on location, you can get a sunburn even when spending the whole day in the shadows. Already our blue sky provides ...
0
votes
0answers
21 views

Can anyone tell me what this is [closed]

Not sure what this is found in Oklahoma
1
vote
1answer
55 views

How big of an event is needed to trigger a long winter?

Could a small meteor or natural nuclear explosion melt an ice cap on Earth to trigger a mini ice age without the event being observed by people? Can the Earth have an overlaying thermal cycle that ...
-3
votes
0answers
48 views

What about a countercurrent system of zig zag trenches in The Sahara [closed]

My idea is to dig trenches funded by big oil, which will be like a zig zag, up and down, moving across, and the sea could flood in from the med or the Atlantic to the Sahara. The question is if sea ...
0
votes
0answers
38 views

Is this “rock” hiding a fossil of a claw from a reptile

[][1 I found this on a beach could it be a fossil of a claw?
1
vote
1answer
22 views

reverse time migration for wave equation PDE using SBP-SAT

I'm stuck implementing a reverse time migration technique, the PDE(partial differential equation) being implemented is an acoustic wave equation, The numerical method being used is a FD(finite ...
1
vote
0answers
44 views

FOSSILZED WOODEN TOOL [closed]

My son found a fossil on the beach at the foot of the cliff face at Robin Hoods Bay in the UK. It is definitely a fossilized piece of wood, but we would like to know what type, and also if it was ...
5
votes
1answer
107 views

Are these plane trails seen from satellite

Here are photos from West of Normandy, at 7-9am after sunrise on the 14th of may, from the visible satellite. It's a bit strange that they are visible from space, they are 2-3 miles wide? Are they jet ...
1
vote
0answers
37 views

what type of rock is this? blue/green and brown [closed]

I found this rock while up in the mountains and I have no idea what type of rock it is.
0
votes
0answers
24 views

What are “young thrust faults” and why are they significant on the Moon?

The abstract of the new Nature Geoscience paper Shallow seismic activity and young thrust faults on the Moon reads: The discovery of young thrust faults on the Moon is evidence of recent tectonic ...
0
votes
0answers
27 views

What is this rock found in the dry wash in Bluff, Utah? [closed]

Does anyone know what type of rock this is? The 3rd picture is the same as the 4th, but the 4th has a regular (not black light) flashlight held underneath it. Thanks!
0
votes
0answers
20 views

What are these rocks? [closed]

I found both of these in a river in North Yorkshire. Can anyone suggest what they may be? Thanks
-2
votes
0answers
38 views

Can Earth have season on top of seasons? [closed]

In history there is always a reference to the great winter? That makes me ask if there was also a long summer? I understand that the Earth froze over a few times or more, but in between those times ...
1
vote
0answers
69 views

Does this weather pattern have a name?

The past few weeks of spring in northern Ohio I believe I have noticed a weather pattern where the weather forecast will show a string of days with rain, but what happens is the day is mostly clear, ...
0
votes
0answers
39 views

Why doesn't vapor counts when calculating global radiative forcing?

When NOAA/ESRL calculates global radiative forcing (Table 2) there seems to be no contribution from water vapor. How come?
0
votes
0answers
9 views

Assessing graded bedding in metamorphosed pelitic sediments

I have the following image of metasedimentary outcrop from a Proterozoic continental rift-fill sequence: The middle layer has a pelitic composition and contains abundant cordierite porphyroblasts (...
2
votes
0answers
45 views

Query about inclination in Earth's axis of rotation

Earth revolves around the Sun in a elliptical path, situated on one of the Sun's focal points. If Earth is considered as a large body with mass attracted towards the Sun's core causing its revolution ...
0
votes
0answers
52 views

Can someone identify this flesh looking rock? [closed]

I acquired a bag of rocks and I’m hoping somebody might be able to identify this pinkish flesh looking rock.
0
votes
0answers
46 views

Is this a geode?

So just having issues with identification looks like a outer line of rock a bit transparent but the inside polished looks waxy other side of stone a bit more foggy but still blue visible Edit - ...
0
votes
0answers
18 views

How fast does the outer core spin?

I've tried looking for the answer of this question but the only thing that comes out is how much does the inner core rotates but I'm specifically looking for, how much does the outer core move per day....
-1
votes
0answers
38 views

Which are the greatest disadvantages of this description of glaciation periods?

At the beginning of a global cooling and a new glaciation there is a lot of snow covering more land areas in north longer and longer times, until the last season's snow remain into the new season. The ...

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