Volcanos

[cheesecake]

A few years ago when i was in Lanzarote we went on the tour of volcano's and it was soo much fun!!....

So what do you think about volcanos??

How exactly does a volcano work??

I know that there is a store of magma under the ground in a chamber, and the tubes come up the mountain (volcano) and there is a lid thing to it...and the pressure inside builds up and the magma come out as lava...

I think the natural disaster of pompii was such a shame!!...here's a link to a website on it... www.harcourtschool.com/activity/pompeii/

[SilentVoice]

Im tired now so Ill explain it to u tomorrow

[JNK]

geysirs are nice too in iceland.

[cheesecake]

jnk said:

geysirs are nice too in iceland.

Are geysirs volcanos?

[cheesecake]

silentvoice said:

Im tired now so Ill explain it to u tomorrow

Lucky me, can't wait ^_^ ...say silent, enlighten me please not set me on fire though, that would hurt

[JNK]

cheesecake said:

jnk said:

geysirs are nice too in iceland.

Are geysirs volcanos?

yes they are one kind of volcanos, i think...

[SilentVoice]

jnk said:

cheesecake said:

Are geysirs volcanos?

yes they are one kind of volcanos, i think...

Nope
They are the water that was deep in the ground but It got really warmed up by a close volcano(or any other magmatic activity under ground) and with high pressure it found/made a hole from which it erupts out in exact time intervals(as long as heat is present) www.umich.edu/~gs265/Xgeyser.gif

[cheesecake]

silentvoice said:

jnk said:

yes they are one kind of volcanos, i think...

Nope
They are the water that was deep in the ground but It got really warmed up by a close volcano(or any other magmatic activity under ground) and with high pressure it found/made a hole from which it erupts out in exact time intervals(as long as heat is present) www.umich.edu/~gs265/Xgeyser.gif

Ahh that's rather niffty!!...splendid!! thanks silent

[JNK]

kind of, kind of...
yes, that heat source can be volcanos lava.

[SilentVoice]

jnk said:

kind of, kind of...
yes, that heat source can be volcanos lava.

Not really coz the heat comes from bellow and only magma is bellow,when magma erupts(as a volcano) it becomes lava.

[cheesecake]

silentvoice said:

jnk said:

kind of, kind of...
yes, that heat source can be volcanos lava.

Not really coz the heat comes from bellow and only magma is bellow,when magma erupts(as a volcano) it becomes lava.

The magma, is that not a waste product from the core of the earth?

[SilentVoice]

cheesecake said:

silentvoice said:

Not really coz the heat comes from bellow and only magma is bellow,when magma erupts(as a volcano) it becomes lava.

The magma, is that not a waste product from the core of the earth?

Magma IS the core of the Earth(our planet),the center,the still uncooled part of our planet(molten rocks,metals,minerals and other supstances)

[cheesecake]

silentvoice said:

cheesecake said:

The magma, is that not a waste product from the core of the earth?

Magma IS the core of the Earth(our planet),the center,the still uncooled part of our planet(molten rocks,metals,minerals and other supstances)

I'm going along the right lines ..... but why does the magma come put the volcano, i know it's to do with the pressure building up inside, but does that not mean magma is constantly being made?

[SilentVoice]

Well its a hard question to say is it always being made but I think so.
Anyway when tectonic plates move and shift they make a lot of pressure down in the deep layers of ground(at some points its magma),so pressurized magma now tries to make a way out(up) making some of its way and finding already finished ones through which it finally comes to the top and erupts as lava at ground surface(or water - at the bottoms of the sea level). As it erupts with such force it makes a big conic shaped hill with a big hole in the middle(through which it goes out). Those are called volcano craters.

Here is a pic/scheme of an old volcano like Vesuvius(since it has layers of old cooled off lava):
www.kidscosmos.org/kid-stuff/mars-trip-graphics/volcano-diagram.gif

Here is a pic/scheme of a fresh volcano erupting
www.yourdictionary.com/images/ahd/jpg/A4volcan.jpg

[cheesecake]

Ahh thanks .. i know that you can get diffrent types of eruptions like ash ones (i think, i'm thinking on mount st helens!)

[Zecristo]

Of course you are all talking of Earth's volcanism but there are volcanos on other solar system planets and satelites, and in a way also on comets when they get near the sun.
One of the programs of the BBC series Planets deals in some detail with planetary geological activity including volcanism.

You can see Io, the most volcanic (known) body of the whole solar system, due to huge gravitacional 100m high (we are talking solid crust not liquid) tides generated by planet Jupiter's awesome mass. As someone says on the series draw a map of the surface of Io and the next day it will be completely useless.
www.solarviews.com/cap/jup/ioplumedisc.htm

There are also the biggest volcanos of the solar system in Mars, commanded by the 25km high, 624km diameter Olympus Mons. These are believed to be quite extinct since very long.
www.exploringmars.com/science/olympus_mons.html

Or the strange features on Venus, not all of them volcanos but appearing to derive from volcanism. Warning: those pancakes are not edible.
Not talking of the theory concerning a possible periodical all surface meltdown of the venusian crust.
www.solarviews.com/eng/venvolc.htm

And Triton's nitrogen up to 8km high geysers.
www.chm.bris.ac.uk/webprojects1997/GeorgeE/Welcome.htm

[cheesecake]

Thank you very much Zecristo, very fasinating!!... the vocano's on Mars really caught my attention, and it all makes sense as to why they are so big due to gravity. It made a very interesting read, thank you very much indeed.