Where did igneous rock with large crystals form?

Answer 1

Large crystals form with slow, underground cooling. This will happen below volcanoes, like below the Andes. After those rocks are uplifted, you can get a batholith like the Sierra Nevada.

Answer 2

Pegmatites are intrusive igneous rocks with large crystals. Although the commonly accepted answer is due to slow cooling some geoscientists believe this to be incorrect. Pegmatites are though to have formed due to several reasons including: 1. Reduced number of nuclei from which to make minerals, thus allowing minerals to grow, 2. Fluxing agents such as water vapor or other volatiles leading to (relatively) quick formation of large crystals, or 3. Reduction of temperatures below the solidification point of the pressure of the system, forcing rapid crystallization of large crystals. Regardless of the process, pegmatites typically form at the end stages of the crystallization of an igneous melt.

Answer 3

Igneous rocks with large crystal is formed underground.

Answer 4

That would be slow cooling magma with silicate inclusions. The slow cooling allows the large crystallization of the inclusions. Slow cooling indicates under ground formation as opposed to above ground where the air would rapidly cool the magma and cause very small crystals.

Answer 5

At the centre of the intrusion, which is far from cool country rocks and has plenty of time to cool slowly leaving large crystals.

Answer 6

Crystals are farmed in rock as it cools ,and if it cools very slowly the crystals will be larger.

Answer 7

happen in the volcanoes