Igneous rocks.
when lava emerges on out of mountain then the molten lava cool to form rocks.
No. Magma and lava are molten rock. When the cool they form igneous rock.
The minerals in magma form crystals when solidifying, giving igneous rocks their characteristic hardness.
extrusive rocks can form from Basaltic Lava and Andesitic Lava. :)
Igneous rock forms from the cooling of molten material called magma or lava.
Rocks aren't man-made.
Once magma and lava cool and harden, they solidify to form igneous rocks. The texture and composition of the rocks depend on the cooling rate and mineral content. Over time, these rocks can be uplifted, eroded, and transformed in the Earth's crust through various geological processes.
Lava flows cool rapidly compared to the cooling of rocks underground. The slower cooling time of intrusive igneous rocks allows larger crystal formation. Generally, the more cooling time, the larger the crystals.
Lava.
The three kinds of rocks by their method of formation are IGNEOUS rocks, SEDIMENTARY rocks and METAMORPHIC rocks. Igneous rocks cool from magma or lava. Sedimentary rocks form by the deposition of particulates and silt. Metamorphic rocks form from rocks (usually sedimentary) that are compressed and heated underground.
Lava flows cool to form extrusive igneous rock. Most lava flows consist of basaltic lava, cooling to form a dark rock called basalt. Some, however, may consist of andesite or, rarely, rhyolite and similar lavas.
Magma or Lava