What is magma hardened in a vertical crack?
21) sill An intrusive igneous rock feature formed when magma is squeezed into a horizontal crack between layers of rock and hardens underground. Dikes are formed across vertical cracks, and sills are formed across horizontal ones.
What forms when magma squeezes between layers of rock and hardens?
sill
Magma that squeezes between horizontal rock layers hardens to form a sill. A dome mountain forms when uplift pushes a large body of hardened magma toward the surface, which eventually becomes exposed. A batholith is a mass of rock formed when a large body of magma cools inside the crust.
What is lava called when hardened?
When magma reaches the surface it is then called lava and the eruptions of lava and ash produce volcanoes. The lava that reaches the Earth’s surface will harden and become igneous rock.
What do you call magma that rise and flow into the cracks in the crust but do not reach the surface?
Much of the planet’s mantle consists of magma. This magma can push through holes or cracks in the crust, causing a volcanic eruption. When magma flows or erupts onto Earth’s surface, it is called lava.
What process creates magma?
As the denser tectonic plate subducts, or sinks below, or the less-dense tectonic plate, hot rock from below can intrude into the cooler plate above. This process transfers heat and creates magma. Over millions of years, the magma in this subduction zone can create a series of active volcanoes known as a volcanic arc.
What is liquid magma that reaches the surface also the rock formed when liquid lava hardens?
6th grade science chapter 3 Inside Earth
| A | B |
|---|---|
| volcano | a weak spot in the crust where magma has come to the surface |
| magma | the molten mixtureof rock-forming substances, gases, and water from the mantle |
| lava | liquid magma that reaches the surface: alsothe rock formed when liquid lava hardens |