Question

What would a rock that contains 30% quartz, 20% alkali feldspar, and 50% plagioclase feldspar be called

Answer 1

A rock which contains 30% quartz, 20% alkali feldspar, and 50% plagioclase is called Rhyolite porphyry.

Step-by-step explanation:

• Rhyolite porphyry is known as the igneous rock and lava rock. The rock is made out from a huge composition of clear crystals.

• These kinds of rock’s age are estimated to be around 600,000 years old. And these rocks are formed due to the explosions caused by the volcanoes.

• Due to the reason such rocks are present near the volcanic edges.

Answer 2

The answer would be "Rhyolite Porphyry"

It is a rock that contains

a) Orthoclase + Orthoclase phenocryst = 35 % + 15 % = 50 % = plagioclase feldspar

b) Quartz = 30%

c) Alkali fled spar = 20%