Sentences with phrase «surface igneous rock»

Since volcanic eruptions are caused by magma (a mixture of liquid rock, crystals, and dissolved gas) expelled onto the Earth's surface Igneous rock - Classification of volcanic and hypabyssal rocks: Owing to the aphanitic texture of volcanic and hypabyssal rocks, their modes can not be

Not exact matches

Igneous rocks are formed when molten rock (magma) cools and solidifies, with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.

Igneous rocks are formed by the cooling of magma (molten rock) which makes its way to Earth's surface, often leading to volcanic eruptions.

Angrites are igneous rocks, many of which are thought to have erupted onto the surface of asteroids very early in the solar system's history and then quickly cooled, freezing their original properties — including their composition and paleomagnetic signals — in place.

Large igneous provinces, or LIPs, are huge pools of volcanic rocks poured out at the Earth's surface.

The finding about continents jibes with evidence from igneous rocks — those sourced in hot, molten rock — which indicated that the surface became rigid enough to support mountain belts, which would have eroded, during this period.

Because we can not sample the deep Earth, we must deduce its composition either by looking at the clues hidden in igneous and metamorphic rocks, or by examining proxies for composition and structure such as the three - dimensional variation of the velocity of seismic waves produced by earthquakes and sampled by networks of seismometers on the surface.

Most of Australia's landscape is covered in a blanket of weathered rock, sediments and igneous rocks, effectively «hiding» the surface where mineral deposits lie.

The textbook explanation is that the Moho draws the line between the crust and the mantle: a demarcation between familiar igneous surface rocks - such as granites, basalts and gabbros - and those of the interior peridotites.

Earth and Venus should have had sufficient inner heat to remelt some of its surface basalt to form a range of igneous rocks called granites or «granitoids,» which are coarse - grained blends of lighter minerals (including quartz, feldspar, and mica that are common in Earth's crust but rarer in the smaller planetsimals).