what is molten rock that emerges at the earth's surface?

Answer 1

the hard thing beneath us is floating on a sea of hot rock of aproximately 1500-1600 degrees celsius called lava.when the plates start to move they brake one an other and they often let lava(magma to emerge at the surface of the earth)

Answer 2

I have been to Ecuador and in a helicopter hovered at the creator. The name is Reventidor. It cones from about 25 miles deep ,one of the deepest on earth. I am not a geologist but the rocks that were formed under such tremendous pressure is different from other volcanoes that may be only 10 miles deep. Translated the name means exploding volcano. This is logical that the material was heated much higher than others and as it came to the surface the lava simply exploded. There was a lake at the bottom that was a beautiful aqua in color. I think it was from Copper sulfate which is very poisonous .

Answer 3

generally Iron. on condition that the entire Earth on undemanding consists of the comparable mix of stuff we see someplace else interior the image voltaic equipment, the middle could be iron metallic alongside with some nickel. even nonetheless it fairly is much less dense than organic iron, so approximately 10 % of the middle could be something lighter. Sulfur and oxygen are the two ideal applicants, nonetheless hydrogen has additionally been seen, exceptionally by way of Takuo Okuchi. however the money remains on considered one of the different 2, with oxygen looking fairly extra in all probability, or possibly the two. Seismologists proceed to probe the indoors middle. The middle's eastern hemisphere seems to selection from the western hemisphere interior the way the iron crystals are aligned. the subject is annoying to assault using fact seismic waves could bypass quite plenty straight away from an earthquake, right interior the direction of the Earth's center, to a seismograph. activities and machines that ensue to be coated up ideal are uncommon. And the effects are subtle.

Answer 4

What you are speaking of is volcanic rock, or lava, but the correct term for it is igneous rock.

Igneous rocks are formed when rock (magma) cools and solidifies, with or without crystallisation, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks. This magma can be derived from partial melts of pre-existing rocks in either the Earth's mantle or crust. Typically, the melting is caused by one or more of the following processes -- an increase in temperature, a decrease in pressure, or a change in composition. Over 700 types of igneous rocks have been described, most of them formed beneath the surface of the Earth's crust.

The other kinds of rock are sedimentary (http://en.wikipedia.org/wiki/Rock_%28geology%29#Sedimentary), and metamorphic (http://en.wikipedia.org/wiki/Rock_%28geology%29#Metamorphic).

Each of the three kinds of rock are further broken down into other classifications.

Answer 5

Lava.
[When the molten rock is still underground, it is called magma. When it emerges above ground, it is called lava.]

Answer 6

Lava, I think its called Magma when its underground.

Sometimes you hear people saying molten lava but to me that sounds redundant, like saying liquid water.

Answer 7

Lava

Answer 8

Magma a.k.a. Lava

Answer 9

magma or lava, it usually come out during volcanic eruptions.