Kennedy, W. J., Walaszczyk, I., et al. 2000. Pueblo, Colorado, USA, candidate Global Boundary Stratotype Section and Point for the base of the Turonian Stage of the Cretaceous, and for the base of the Middle Turonian Substage, with a revision of the Inoceramidae (Bivalvia). 50 (3): 295-334.
Place:
Pueblo County, Colorado, United States, North America