Question

Question 13 1 pts Axenolith is- Arock with two distinct textures, where larger crystals are embedded in a finer groundmass Fragments of crust or mantle rock enclosed within an igneous rock A zone of highly concentrated minerals in the magma produced due to crystal settling A magma intrusion that pushes up layers of rock into a dome

Answer 1

Question

A xenolith is

1. A rock with two distinct textures, where larger crystals are embedded in a finer groundmass
2. Fragments of crust or mantle rock enclosed within an igneous rock
3. A zone of highly concentrated minerals in the magma produced due to crystal settling
4. A magma intrusion that pushes up layers of rock into a dome

ANSWER:

A xenolith is Fragments of crust or mantle rock enclosed within an igneous rock

Therefore the correct answer is option b

Explanation:

          The foreign rock fragments are included in the magma when it rises up towards the earth’s surface. If they are not digested, they remain entrapped within the mass of the igneous rock and produce heterogeneity in the texture. Such entrapped fragments of foreign rocks are called the xenoliths. Therefore the correct answer is option b