Koleksi fosil Fromasi Hell Creek terbesar di dunia terletak di Museum of the Rockies, yang terletak di Bozeman, Montana, sebagai hasil dari upaya "Hell Creek", yang merupakan upaya gabungan antara pihak museum, Universitas Montana, Universitas Kalifornia, dan Universitas Carolina Utara.
Iklim
Fosil-fosil crocodilia yang ditemukan pada formasi ini menyatakan bahwa iklim pada lokasi ini dahulunya merupakan iklim subtropis.
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