The largest volcanic eruption of 1991 was that of Mt. Pinatubo in the Phillipines.
Magma!
"are places on the earth's surface where molten rock, gases, and ash from deep inside the earth are ejected."
No. Magma is not pyroclastic, and most rock isn't either. Pyroclastic material is ash and rock fragments ejected during explosive volcanic eruptions. Magma is molten rock beneath the earth's surface.
That would be the first billion years, as the Earth was a ball of molten rock- which then underwent multiple meteoric impacts.
No. First of all, heat is not a substance. Something cannot be made of heat. Igneous rock forms from lava, magma, or tephra that has colled. Magma is molten rock in the earth's interior. Lava is molten rock that has been erupted onto the surface by a volcano. Tephra is material that has been ejected into the air by a volcano.
a molten rock
Molten rock is still a liquid. Igneous rock is what is formed when molten rock solidifies.
Igneous Rock comes from molten rock.
The ash, rock and molten lava that's ejected during an eruption - falls back to earth and 'piles up' around the volcano, forming an island..
Molten rock are come from volcanic in the past, or the lava chambers. Another call of molten rock are igneous rock.
Enchanted Rock is estimated to be around one billion years old. It formed underground as a large blob of molten magma that solidified and was later exposed through erosion.
Lava refers specifically to molten rock that flows on the surface of the Earth during a volcanic eruption. Molten rock, on the other hand, is the hot, liquid rock below the Earth's surface that has not yet erupted. Essentially, all lava is molten rock, but not all molten rock is lava.