Brian Ross Weitz (born March 26, 1979), also known by his stage name Geologist, is a musician best known as a member of the experimental pop group Animal Collective.

[3] His nickname comes from a friend mistaking his major in college, as well as the headlamp he wears in order to see his electronic equipment during live shows.

Deakin introduced his childhood friend Noah Lennox (aka Panda Bear) to Avey Tare and Geologist.

Throughout their high school years and winter/summer college breaks, the four of them played music in different variations and often solo, swapping homemade recordings and sharing ideas.

[2]" As well as performing various DJ sets, Geologist has released the track "Jailhouse" on Animal Collective's Keep Cassette, "Stretching Songs for Spring" on a digital split with Avey Tare entitled New Psycho Actives Vol.