Fossil Leaf

W.A. Gordon
1969 Blue Jay  
Between sixty and seventy million years ago, a forested, warm tem¬ perate, freshwater swamp covered southern Saskatchewan and the ad¬ joining parts of North Dakota and Montana. The specimen in the photo¬ graph provides part of the evidence for that swamp.
doi:10.29173/bluejay3429 fatcat:3sujcv4mgvcnhilqllsc4c3mai