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Hell Creek / Fort Union fossil leaves

Fossil leaves from the Hell Creek and Fort Union formation, originally described in Johnson, K. (2002). Megaflora of the Hell Creek and lower Fort Union Formations in the western Dakotas: Vegetational response to climate change, the Cretaceous-Tertiary boundary event, and rapid marine transgression. Geological Society of America Special Paper, 361, 329–391.

Blonder B, Royer DL, Johnson KR, Miller I, Enquist BJ (2014) Plant Ecological Strategies Shift Across the Cretaceous?Paleogene Boundary. PLoS Biol 12(9): e1001949. doi:10.1371/journal.pbio.1001949

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