Digging a trench in the Lassen Region of Northern CA

Kristina, Lucy, and Katie with Lassen Peak in the background

Kristina, Paul, Stan, and Dan wishing they could summit Lassen Peak

Mike, Paul, and Kristina digging at Lassen

Paul, Kristina, Katie, and Mike in a trench

Kristina at Bumpass Hell in Lassen Peak National Park

Stan, Lucy, and Kristina at a cinder cone quarry in Morocco

Robin collecting tephra from Kilauea 1955 cone