Tree rings tell CSUF students about droughts and fires in the Sierra
Assistant professor Trevis Matheus, right, packs up at Cal State Fullerton with students in his summer Mountain Field Geography course, from left, Case Takata, Dylan Mcdaniel, Carlos Lopez, Raymond Villalba, Kyle Shields, Jessica Venham, Daniel Swenson and Ariana Correa. (Photo courtesy of Cal State Fullerton) Participants in the Mountain Field Geography class stop along the…