Due to high sea levels, subsequent erosion,[7] and the lack of orogenic input of sediment into the Western Interior Seaway unlike the east coast of Laramidia, no terrestrially formed deposits have survived, with most dinosaur remains originating from seaborne carcasses that were transported into marine environments. This same lack of terrestrial sediments is also present on the western coast of Laramidia. Some sediments in the northern part of the range have been removed by glacial erosion of the Laurentide Ice Sheet during Quaternary glaciations,[8] but it is difficult to ascertain how much sediment has been removed, or whether these sediments would have been any more productive than those that remain. Thus relatively little is known about Appalachia in comparison to Laramidia, with the exception of plant life, marine life and the insects trapped in amber from New Jersey. In addition, due to a lack of interest in Appalachia, many fossils that have been found in Appalachia lie unstudied and remain in the inaccurate genera to which they were assigned in the days of E. D. Cope and O. C. Marsh. Only a few fossils of the terrestrial creatures that were found in this region have given us a brief glimpse into what life was like here during the Cretaceous period. However, the area has seen a bit of a resurgence of interest due to several discoveries made in the past few years.[9][10][11][12][13] As mentioned earlier, not much is known about Appalachia, but some fossil sites, such as the Woodbine Formation, Navesink Formation,[14]Ellisdale Fossil Site,[15]Mooreville Chalk Formation, Demopolis Chalk Formation, Black Creek Group and the Niobrara Formation,[16] together with ongoing research in the area,[17] have given us a better look into this forgotten world of paleontology.
^Nielsen, Karsten Schjødt; Schröder-Adams, Claudia J.; Leckie, Dale A.; Haggart, James W.; Elberdak, Khalifa (December 2008). "Turonian to Santonian paleoenvironmental changes in the Cretaceous Western Interior Sea: The Carlile and Niobrara formations in southern Alberta and southwestern Saskatchewan, Canada". Palaeogeography, Palaeoclimatology, Palaeoecology. 270 (1–2): 64–91. Bibcode:2008PPP...270...64N. doi:10.1016/j.palaeo.2008.08.018.
^Kennedy, William J.; Landman, Neil H.; Cobban, William Aubrey; Johnson, R.O. (13 December 2000). "Additions to the ammonite fauna of the Upper Cretaceous Navesink Formation of New Jersey". American Museum Novitates: 31. hdl:2246/2008.