How are igneous rocks changed into other rock types?

Answer 1

Igneous rock is reduced to particles by erosion processes. Those particles can be carried by streams or wind to a point of deposition where they may eventually lithify to become sedimentary rock. Igneous rock such as granite can be transformed to metamorphic rock by exposure to additional heat and pressure deep within the earth.

Answer 2

An igneous rock can become a sedimentary rock by undergoing erosion. An example would be Stone Mountain in Georgia. Weathering and erosion wear away at the mountain, and the particles of quartzite that break away from the mountain are carried from streams to the ocean. Over millions of years, the sand will build up in layers, along with other sediments that end up in the same location. After all deposition (depositing of rocks), cementation and compaction will occur (the "gluing" and compacting together of rocks). This will then turn quartzite particles from the mountain into sand, which will then form into sandstone, a sedimentary rock.

An igneous rock could become a metamorphic rock automatically if it goes through heat and pressure processes. (If the igneous rock had already become sedimentary, it could undergo the same pressures to become a metamorphic rock - any one type of rock could become any of the other two types of rock.) Rocks would build up, and heat would be almost, but not quite melt the rock because of all the pressure. Then the rock would coll and harden up to create a metamorphic rock. :)

Answer 3

It depends on how fast the lava cools after it is released from the volcano. If it cools quickly, it will become a porous rock, often with holes, such as pumice. If it cools slowly, it will form crystals and turn into a dense rock such as obsidian.

Answer 4

Igneous to sedimentary: Igneous rock becomes exposed at the surface. Weathering of the rock occurs and the rock is broken down into smaller and smaller particles. The particles are transported and deposited by rain, wind, gravity, or ice to a place of deposition, where they eventually lithify through compaction and cementation into a sedimentary rock.

Igneous to metamorphic: An igneous rock body is exposed to heat and pressures from tectonic plate collisions. The directional stress imposed on the rock causes the constituent minerals to align themselves perpendicularly to the direction of the stress and some recrystallization may occur, creating a banded or foliated metamorphic rock.

Answer 5

igneous rocks must undergo a sexterionation change before changing

Answer 6

It would have to undergo tremendous heat and pressure and be melted into magma and solidify

Answer 7

By melting and cooling