The series premiered on demand on November 23, 2015, and on Syfy on December 14, 2015. A 13-episode second season premiered on February 1, 2017. In March 2017, Syfy renewed The Expanse for a 13-episode third season to air in 2018.
Perlite is an amorphous volcanic glass that has a relatively high water content, typically formed by the hydration of obsidian.
Aplite-a very fine grained intrusive igneous rock composed of quartz and feldspar. Basalt-a volcanic rock of mafic composition. Adakite-a class of basaltic rocks containing low amounts of yttrium and ytterbium. Hawaiite-a class of basalts formed from ocean island (hot spot) magmatism.