Mountains, the electronic duo of Koen Holtkamp and Brendon Anderegg, are aptly named. Their songs don’t progress so much as sprawl, with soundscapes that conjure up bird’s-eye views of craggy peaks. The seven songs on “Centralia” (Thrill Jockey Records) pulse and throb like time-lapse versions of geologic time as each track builds up inexorably. Even “Propeller,” which goes on for 20-plus minutes, has a sense of movement because it feels like a couple of epochs of range-building boiled down to one-third of an hour. Mountains play at 9 p.m. Wednesday at Nightlight in Chapel Hill with feltbattery, and the cover is $6. See nightlightclub.tumblr.com for details.