KnowraNiobrara FormationLinked fromLinked fromThe 7 pages that link to Niobrara Formation, each with the reason it gives.All 7Broader topic 4Related 3PteranodonRelated: Its chalk deposits preserve many Pteranodon fossils from the Western Interior Seaway.XiphactinusRelated: Its chalk and limestone preserve notable Xiphactinus specimens.CretoxyrhinaRelated: Its chalk beds preserve abundant Cretoxyrhina remains alongside marine reptiles and fishes.