1970 Southeastern Minnesota Field Trip

1970 group photo, on the Saint Peter Sandstone (Ordovician), southeastern Minnesota.

(Photo by A.C. Ashworth)

1971 Big Horns Field Trip

Dr. John Brophy and Dr. Chuck Metzger, with Jim Ramsett and Major Ev Thomas. Black Hills, S.D.

(Photo by A.C. Ashworth)

1971 Big Horns Field Trip

1971 group photo, Fisher Grove State Park, Redfield, South Dakota.

(Photo by A.C. Ashworth)

1973 Southeastern Minnesota Field Trip

(Photo by A.C. Ashworth)

1974 Big Horns Field Trip

1974 group photo, Dinosaur Park, Rapid City, South Dakota.

(Photo by A.C. Ashworth)