Geologist (born Brian Ross Weitz on March 26, 1979) is a founding member of Animal Collective. He provides electronic sound manipulations and samples for the band. Geologist grew up in Philadelphia and Baltimore and currently lives in Washington DC. The "Geologist" nickname comes from a friend's misinterpretation of Brian's university major. Geologist attended the Park School of Baltimore where he met future Animal Collective bandmates David Portner (aka Avey Tare) and Josh Dibb (aka Deakin).