Earth Science

On a site www.mammoths.narod.ru in functional aspect the chronology of changes in the past on a planet, from the moment of occurrence of the Earth in Solar system is proved

Hello you all! It's just puzzling me... The Oceanic bed has some rifts and trenches, but these are rather local; on most area, the bed is rather flat. Continents have mountains and valleys, but these are local as well, with most area fitting within 0 to 300m. Now, I wonder: when observed from the Oceanic bed, the Ocean is about 3000m thick, and continents are only 100-200m higher (not thicker). Is that pure chance that lasted for eons? Or is there some deep reason for it? Thanks! Marc Schaefer, aka Enthalpy

If rock is stressed (extension, compression), then do seismic waves propagate there-through differently? Can seismic data indicate where rock is being compressed, vs. stretched? Inexpertly, differences in density (compression increases, tension decreases) might be observable

Do the Louisville seamounts (bottom right) relate to the Marshall - Ellice (Tuvalu) seamounts (center right)? Has the northwest spur of the Australian plate, in obducting some of the Pacific plate, obducted dozens of seamounts which originally spanned the gap between the Louisville & Marshall - Ellice (Tuvalu) igneous provinces ?? Visually, the Louisville seamounts run in a straight line towards the Ellice (Tuvalu) islands, intercepted only by the "corner" of the Australian plate. If so, then the linear length, of the northwest-trending section, of the "Louisville - Ellice (Tuvalu) - Marshall" seamount chain, represents the original length, of the Emperor island ch…

Do oceanic slabs, subducting under continents, commonly fault & fragment, into (progressively smaller) pieces? i have learned about the following ancient oceanic plates, from the past ~200 Myr. Perhaps oceanic plates can "tear", faulting & fragmenting whilst sub-ducting under continents, whose "roots" are uneven, irregular, and penetrate down to varying depths? Perhaps if such "tears" work back up, and back out to sea, such "tears" become new spreading ridges, resulting in oceanic plate "breakup" ? Farallon (subducting eastwards under N&SA) Intermontane / Insular microplates Kula Eshamy Resurrection [*]Juan de Fuca [*]Rivera [*]Cocos [*]Na…

As evidenced by the Emperor - Hawaii island chains, c.45Mya, the northwards-sliding Pacific plate began sliding westwards. If that sudden shift in direction was caused by some massive force (North America obducting east Pacific ridge near San Francisco, so "slamming into" the Pacific plate on the other side of the M.O.R.?), then perhaps the Philippine plate was "cracked off"? The northwards slide of the Philippine plate resembles the ancient northwards trend of the Pacific plate, before c.45Mya. The Philippine plate is c.50 Myr old. 50 Mya, Asia was subducting younger Pacific plate, with older (colder, denser, deeper) Pacific basin farther out to sea. Thus, Asia w…

I am trying to determine if the perigee and apogee of the moon's orbit comes on a reliable timeline? is there a fixed amount of time between one perigee and the next or is it variable? What I am trying to ultimately find out is if the perigee and apogee of the moon's orbit would be reflect on a tidal plot record of about a month? any help would be appreciated

Hello, I am looking for some help identifying a rock found by my father in Eastern Montana. It is roughly the size of a football and weighs almost 10lbs. It resembles a geode but it has no crystals and is quite smooth throughout the center. This rock has not been cut, it is hollow all the way through. Any help is really appreciated! Thanks!

How would the earth-specfic mineral crystallization sequences be affected, if rocky material (as on earth) were combined in a slurry, with various ices, as occurs during assemblage of planets, in (example) our outer solar system ?

Going into my second year in college with a major in geology, I realized I want to do more then just finding oil as a career. I feel like the high demand in the fossil fuel industry is strictly finding oil. All the geologist I talk to just locate oil for energy companies, but I want to do more then that . I want to contribute to better energy sources like nuclear power. Is this possible to achieve with a geology degree? Or any other sources of energy?

Not just on the surface, but down to its core. Let's say eons ago there happened to be a great deal of water in one area of a star system, water that via gravity collected and eventually formed into a planet. Along with gases for atmosphere. There would be enough dissolved minerals for life to develop into living bodies, complex functions, and interconnected ecosystems. Any solid formations would be life-based -- such as coral lattices or floating star trees (named for its wooded shape) -- or disintegrated meteors from the occasional cosmic impact. There may even be flying creatures above water, using large patchworks of star trees as a rest stop. It's a pl…

Hey everyone I'm new here but I just had a crazy thought that I wanted to spitball with people who are well......smarter than my friends =) Anyways I was wondering: the general theory behind global warming is that CO2 generated from fossil fuels acts as a greenhouse gas which traps the energy generated by the sun in the form of heat, ultimately increasing our atmospheres average temperature(this is my understanding of it). So my idea is that perhaps the excess energy isn't coming from the sun and is instead a result of burning fossil fuels in the first place? It makes sense and really does a nice job(at least in my mind) of explaining the whole situation. Think about it t…

Today i find that Radius of any Planet is equal to depth of its Gravity Well from its surface to outer Atmosphere. So, please help me more in explaining this relation.

how are geysers formed

This is a brief question exposing my lack of knolwedge on this issue. However, on average, I am considering that most of Northern Europe (including e.g. Sweden, Norway and Scotland) is colder than Southern Europe closer to the Equator. However, why is it that Australia, New Guinea and New Zealand are considered hot countries when they are close to the South Pole? I would love to know the answer.

We came across this rock on the Mogollon Rim in Arizona. The white outer layer is somewhat soft (as rocks go) and the inner yellow material was quite soft, almost powdery when scraped. Can anyone tell me what it is?

Hello All, I am trying to identify the proper method in which antibiotic powders should be stored long-term. Does anyone have a GLP procedure denoting this or can you state the proper method to store antibiotic powders long-term? When desiccating antibiotic powders, what is the best method in which to store them... place them in a desiccator with the antibiotic container lid tightly closed or loosely closed? Any source/reference material is greatly appreciated? Thanks.

I am seeking someone to assist me in identifying a very unusual rock (or maybe a fossil) that has been in my family for many many years. It is approx 10” long and 10” wide, is tan to light brown in color, weighs about 10 lbs, and is shaped like two footballs lying side by side joined together. Both ends of both “footballs” have openings. There are many small holes in the rock. If the story is correct my grandmother had this rock in New Mexico. I’ve attached five images for your viewing. I would greatly appreciate any assistance you can provide or if you could steer me to an individual or agency I may contact for information. Thanks so much in advance for…

Hi All, I have a hypothetical question and apologise in advance for my layman’s language. If half of the Earth’s atmosphere suddenly disappeared, would the other half become unstable? I would imagine so and would therefore like to also ask for your ideas on the following- How long would the other half of the atmosphere take to collapse? How long would air be available for us to breathe? Thanks you so much

When Earth is moving around the sun, our movement is pro or con against the Galaxy rotation or it's movement. But we do not feel anything about it. Does the rotation of the Earth cancel the effects out?

Does anyone have any tips on determining dolomite percentage in a well-site setting? I was thinking that comparing the rate of effervescence in a 10% HCl in water solution could give some quantitative results. Maybe comparing the rate while changing parameters such as temperature of solution, strength of HCl solution or powdered vs solid sample. I could make a chart with the rate of known samples under these different conditions to compare to. I haven't tried this yet but what do you think? Any tips or better ideas? Thanks! To be clear I mean % dolomite in limestone/dolomite samples

I found this rock and it has been cut in half and polished. I would like to know what kind it is. When you put both halves together it measures approximatly 11in in diameter or about the size of a softball. If anyone can give me any insight as to what they think this is or can tell me what this is I greatly appriciate it. Thanks.

Not sure where to post this, there is no subforum about space travel, but since I want to make some points that are relevant for earth sciences too, I post it here. Quite recently an announcment was made about a project called Mars One that is targeting to put people on Mars from 2023 and ongoing, and uses a quite remarkable strategy: there will be no return trip. Technically we do not yet master a launch from Mars, and it would be quite expensive, and by dropping that part of the flight, Mars One conjectures that their plan to bring people to Mars can succeed and costs much less then other plans. Finances for the project costs (around 5 billion euro or some) are co…

Hello, I need to interview an environmental scientist/expert for my AP environmental science summer assignment, so i thought it would be a good idea to ask someone online to answer these questions. IF you would like to answer them, just answer the questions to the best of your ability, and put your name at the end of your post, as well as any formal titles that would prove your expertise (not necessary but would be preferred). Please take the time to give some input to these questions, it would be very helpful to me and also it would shed some light on views on important environmental issues. 1.Do you believe that global warming is an eminent threat or won't rea…

I am working on a tsunami crisis simulation for a foreign policy conference. This tsunami will be caused by an earthquake just below Cuba and has to be massive enough to effect the coastlines of Belize, Honduras, Nicaragua, Jamaica, Costa Rica, Panama, Columbia and Venezuela. However, I am a politics major and do not have an extreme understanding of the science of this disaster. My most pressing concern is, is it possible for this tsunami to reach as far as the collection of islands on the east end of the Caribbean? Help would be greatly appreciated. Thank you!