14 Answered Questions for the topic volcanology

07/29/19

The position of magma chambers?

Where do magma chambers exist? Is it necessary that they exist in the asthenosphere where the circumstances of temperature and pressure are suitable for the rocks to be molten? Or they exist in... more

07/18/19

Are volcanoes formed from earthquakes?

I know that some earthquakes are caused by volcanoes and that some earthquakes can trigger volcanic eruptions close to where the earthquake is. But what if a great earthquake(8.0 or above) occurs... more

07/11/19

Why do some earthquakes and volcanoes occur within plates?

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

07/10/19

Volcanoes in the Great Barrier Reef?

Was there ever at any point in time a volcano in the great barrier reef? I thought atolls develop from volcanic islands, and the coral grow around them.

07/04/19

What is the source of lava of volcano? From magma below crust? Or from molten crust by rubbing?

Ok, it looks like a very simple question but I still have some point want to clarify... Most images explain volcanos contain some orange stuffs as magma below volcanoes as magma chamber, but the... more

06/08/19

Is the magma in one volcano different from the magma in every other volcano?

Is there a significant difference between the magma in different volcanoes? If so, why?Doesn't all magma come from the same place if you go down deep enough?

05/26/19

What is the source of lava of volcano? From magma below crust? Or from molten crust by rubbing?

Ok, it looks like a very simple question but I still have some point want to clarify...Most images explain volcanos contain some orange stuffs as magma below volcanoes as magma chamber, but the... more

05/19/19

Determining a rock age using volcanic ash layer?

I wanted to know if volcanic ash deposits found in the geologic record are most useful in correlating the age of rock layers if the volcanic ash was distributed over a large area during a short... more

05/11/19

What are the high field strength and large ion lithophile (HFS or HFSE & LIL or LILE) elements?

There are two groups of elements that are frequently mentioned when discussing incompatible trace elements. They are the high field strength elements (HFS or HFSE) and the large ion lithophile... more

04/28/19

Is the magma in one volcano different from the magma in every other volcano?

First off, a confession: I'm asking this question because of *The Lord of the Rings*. If you're not aware already, in the story, a magical ring can only be destroyed in a specific volcano. The... more

04/28/19

Can we see lava in a divergent tectonic boundary?

Can we actually see an orange line of lava if we look down to the crack of the divergent boundary of tectonic plates?

04/11/19

Where can obsidian be found?

Where is obsidian found? Is it typically found on the surface or underground? If underground, how far under (meters or feet would be perfect)? Also, is it found everywhere on Earth, or just in... more

04/02/19

Are coral cays and coral atolls just volcanic islands?

Are coral cays and coral atolls just a different type of volcanic island? When I hear: "volcanic island" I think at places like Moorea or Hawaii, but ultimately, coral cays and coral atolls lay... more

03/19/19

Magma resultant from group 1 and group 2 elements?

I was recently speaking with a geology professor over lunch at a university who has a theory that I've never heard before. His postulation was quite compelling and I was hoping to do a little... more

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