1970-1974 Field Trip Photos
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1970 Southeastern Minnesota Field Trip
1970 group photo, on the Saint Peter Sandstone (Ordovician), southeastern Minnesota.
(Photo by A.C. Ashworth)
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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)
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1971 Big Horns Field Trip
1971 group photo, Fisher Grove State Park, Redfield, South Dakota.
(Photo by A.C. Ashworth)
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1973 Southeastern Minnesota Field Trip
(Photo by A.C. Ashworth)
![](/fileadmin/_processed_/2/0/csm_bh_74_1_a0c731972c.jpg)
1974 Big Horns Field Trip
1974 group photo, Dinosaur Park, Rapid City, South Dakota.
(Photo by A.C. Ashworth)