Pen Formation
From Wikipedia, the free encyclopedia
From Wikipedia, the free encyclopedia
The Pen Formation is a Campanian-age geologic unit in the western United States.
Sharks are well known from the Pen Formation.[1]
Other fishes include Xiphactinus,[1] the ray Ptychotrygon,[1] and gar.[1] The nodosaurid ankylosaurs Acantholipan and CPC 273 have also been found in the Pen Formation.[2]
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.