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%
Country : Brazil
City : Sao Paulo
E its lava came up from an explosive eruption
I think it's climate or humidity
