Меловой период

Sealey P.L., Lucas S.G. (2019) Late Cretaceous (Cenomanian-Campanian) Ammonite Systematic Paleontology and Biostratigraphy, Southern San Juan Basin, Sandoval County, New Mexico // New Mexico Museum of Natural History & Science. no. 80. 245 pp.

https://econtent.unm.edu/digital/collec ... 315/rec/84
https://econtent.unm.edu/digital/api/co ... 5/download