Gruesome California Crime Stories That May Play A Part In âTrue Detectiveâ Season 2. Nic Pizzolatto isnât letting us into his warped, deviant mind when it comes to salient plot points surrounding the second season of the highly-acclaimed HBO anthology series, True Detective, but he has dropped a few hints.
Rhyolite: Fine-Grained Felsic Rock Most rhyolites are light gray to pinkish in color, but red or even black rhyolites are not rare. Most rhyolites are porphyritic and are identified by the quartz phenocrysts and white to salmon K-feldspar phenocrysts. The groundmass is aphanitic or even glassy.
Rhyolite is a fine grained extrusive igneous rock similar to granite. Rhyolite forms from particularly viscous molten lava and is grey, brown or reddish in colour, darkening w â¦ ith age. Rhyolite is essentially composed of feldspar, mica and quartz with numerous accessory minerals present :).8 people found this useful.hyolite is a type of igneous felsic rock. It is known for its gray  and variable texture that can be glassy, porphyritic, or aphanitic.  It can be a combination of minerals â¦ like plagioclase, sanidine, or  quartz with additional minerals like hornblende or biotite.