Igneous Rock

Yes, the heat of the lava may well turn some of the water into steam, but the sea will cool & solidify the lava.

Igneous rocks formed within the earth crust have larger crystals than those formed on the surface because they have little or no interaction with atmospheric conditions and they cool very slowly.

Porous means a rock is able to absorb water.

It's impossible to say what specific igneous rock the rock marble may become after it is melted and becomes mixed with other molten rock before solidification into an igneous rock. It would most certainly have none of the characteristics of the original marble.

obsidian's advantages are its really pretty

no Marble is a metamorphic rock

Rock made from erosion into small particles, and compacted under great weights of materials above are called, "Sedimentary rocks".

nothing

Ultrabasic is a general term, probably first used by J.W. Judd in 1881, applied to igneous rocks containing little or no feldspar and characterized essentially by the abundance of one or more common mafic minerals such as olivine, pyroxene, and amphibole. Chemically, the rocks contain <45% SiO2 and the term ultrabasic is used along with basic, intermediate, and acid (ic) in a chemical classification of igneous rocks as distinct from ultramafic, mafic, and felsic which refer to a mineralogical color index. However, the term ultrabasic commonly is used incorrectly as synonymous with ultramafic to include such rocks as ultramafic pyroxenites that contain as much as 55% SiO2.

Dark igneous rocks usually have higher amounts of heavier elements such as iron. Light-colored igneous rocks tend to be richer in lighter elements like sodium and aluminum.

Igneous rock can become sedimentary if it is weathered into sediment and then lithified.

Sorry i said you at the end instead of me):

Igneous rocks are formed around hot spots when there is an increase in temperature, a decrease in pressure, or a change in composition. Igneous rock is formed through the cooling and solidification of magma or lava.

yes

Geologists classify igneous rocks based on their mineral composition, texture (grain size and arrangement of crystals), and overall chemical composition. Igneous rocks are further categorized as intrusive (formed below the Earth's surface) or extrusive (formed on the Earth's surface) based on where they solidified.

Serpentine is a type of metamorphosed sedimentary rock.

Rhyolite can form at convergent plate boundaries where magma is generated from the melting of continental crust material being subducted. Subduction zones can provide the necessary conditions for the production of rhyolitic magma, resulting in the formation of rhyolite.

Volcanic rock, especially basalt, contains some iron. When the rock is still molten the particles of iron are free to move, but are influenced by Earth's magnetic field. When the lava hardens into rock these iron particles are locked in place, essentially recording the orientation of Earth's magnetic field.

Yes

Magma. Magma rises towards the surface when it's less dense than rock around it. Otherwise, it collects in magma chambers and cools, forming igneous rock.

organic

would it be heat

Rhyolite is a volcanic rock formed when highly viscous magma rich in silica erupts. In many cases rhyolite comes in the form of tuff, formed when the material is blasted out explosively, forming ash and pumice which eventually settle to the ground. Sometimes this tuff is so hot it gets welded into a solid rock. In other cases it erupts as lava. This lava will either form extremely thick lava flows or pile up on the vent as a lava dome.

The majority of minerals associated with igneous rocks are silicates. It is the proportion of certain silicate minerals that affects the color of igneous rocks. Igneous rocks that are high in orthoclase feldspar, quartz, and muscovite mica will be lighter in color than igneous rocks that are higher in olivine, pyroxene, amphibole, and biotite mica.

chalk. Chalk is a type of limestone composed mainly of the mineral calcite, which is a sedimentary rock forming in marine environments. Igneous rocks are formed from the cooling and solidification of magma or lava, so chalk is not typically found in igneous rocks.