An opening in the Earth's crust where melted rock reaches the surface is called a volcano.
LAva
volcano
If it reaches the surface, it is magma or lava. If it merely intrudes into rocks already formed, it is intrusive. Such as sills and dikes.
A volcano or volcanic vent is an opening in the earth's surface that allows melted rock (lava) to flow out.
When melted rock reaches Earth's surface, it cools quickly and solidifies to form an extrusive igneous rock. This rapid cooling prevents large mineral crystals from forming, resulting in a fine-grained texture. Common examples include basalt and rhyolite.
LAva
a Obsidion rock
volcano
a Obsidion rock
volcano
If it reaches the surface, it is magma or lava. If it merely intrudes into rocks already formed, it is intrusive. Such as sills and dikes.
From holes in the ground that push up the melted rock
A volcano or volcanic vent is an opening in the earth's surface that allows melted rock (lava) to flow out.
When melted rock reaches Earth's surface, it cools quickly and solidifies to form an extrusive igneous rock. This rapid cooling prevents large mineral crystals from forming, resulting in a fine-grained texture. Common examples include basalt and rhyolite.
A volcano.
When melted rock reaches Earth's surface, it is called lava. Lava can flow out of volcanoes during an eruption, cooling and solidifying to form igneous rock.
Volcanoes do not cause rocks to melt, they are just the exit where melted rock come to the earths surface.