Angular Unconformity
Colorado
June 1987

Death Valley
California
March 1988

Sand Dunes
California
September 1988

Delicate Arch
Utah 
October 1988

Mammoth Hot Springs
Wyoming 
May 1989

Triassic Strata
Utah 
October 1990

Haleakala Crater
Maui
October 1996

Great Sand Dunes
Colorado 
October 1996

Delicate Arch
Utah 
October 1996

Jurassic Navajo Sandstone
Utah 
1998

Pennsylvanian Bioherm
Colorado 
1998

Exfoliation on Half Dome
California 
May/June 1998

Cretaceous Monzogranite 
California 
September /October 1998

Continental Divide
Colorado
December 1998

Continental Divide
Colorado
June 1999

GSA 2000 Exhibitor Prospectus 
Sand Harbor and Lake Tahoe 
Nevada

AEG - GRA Annual Meeting
June 2000 
Marin Headlands 
California

Sunrise over March AFB and San Jacinto Mountains California

GSA 2000 Annual Meeting 
Lava Flows and Lake Tahoe
Nevada

AAPG 2001 Annual Meeting
Pennsylvanian Minturn Fm
Colorado

GSA 2002 Annual Meeting
Boulder Flatirons
Colorado

GSA Today April 2003
Mt. Rainier, Washington