Greenhorn Limestone
Videos
The Greenhorn Limestone or Greenhorn Formation is a geologic formation in the Great Plains Region of the United States, dating to the Cenomanian and Turonian ages of the Late Cretaceous period. The fo
The Jetmore Chalk Member of the Greenhorn Formation in Kansas.
The iconic stone posts of Kansas were cut from a layer in the Greenhorn.
Paleoart depicting two large marine predators of the late Cretaceous; Elasmosauridae and Xiphactinus.
Xiphactinus
Videos
Xiphactinus is an extinct genus of large predatory marine ray-finned fish that lived during the late Albian to the late Maastrichtian. The genus grew up to 5–6 metres in length, and superficially rese
Greenhorn Limestone
…swollen by the heavy rainfalls of the hothouse Cretaceous. Paleoart depicting two large marine predators of the late Cretaceous; Elasmosauridae and Xiphactinus. See also Volcanic mineralization of the Greenhorn sequence: Bentonite, sedimentary volcanic ash, general showing some weathered iron stain in the…
Xiphactinus AMNH
Detailed view of the skull of Xiphactinus at the American Museum of Natural History
Xiphactinus compared to other ichthyodectids
Depiction of a Xiphactinus swallowing a Gillicus