Dr. & Mrs. Neilson at Guadalupe Peak during the GSA Spring Break Trip in 1998 Dr. Nielson and Dr. Barker at White Sands National Monument, New Mexico during field camp 1998 1998 AAPG Student Chapter Field Trip in Arches National Park, Utah 1998 Field Camp Participants at Guadalupe Peak Dr. Nielson at the Grand Canyon in 1998 SCIENCE HOME GEOLOGY HOME CONTACT WEBMASTER