Substructure was a progressive deathcore band from St. Louis, Missouri that formed in 2011 and ceased activities in 2013. Their EP 'Monolith' was released on September 2, 2011. Bandcamp - http://substructure.bandcamp.com
Facebook page - http://www.facebook.com/Substructurestl -- There is also an ambient artist of the same name.

Read more about Substructure on Last.fm.