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Fossils from the Late Cretaceous Western Interior Sea

The entire Oceans of Kansas web site is Copyright © 1996-2017 by

Mike Everhart (mike at

TWENTY YEARS ON THE INTERNET! (On the Web since December, 1996)

  Last updated 12/20/2017


OCEANS OF KANSAS: A Natural History of the Western Interior Sea - THE BOOK (Published 2005)

LEFT: FHSM VP-13910,  Selmasaurus johnsoni, Polcyn and Everhart (2008), a new species of mosasaur from the Smoky Hill Chalk of western Kansas

The 2nd Edition of Oceans of Kansas - A Natural History of the Western Interior Sea will be published in September, 2017. The updated book will be larger, with more figures, descriptions of new discoveries in the past 12 years, and an in depth look at the history of Late Cretaceous paleontology in Kansas. I'm very pleased that the Indiana University Press has given me the opportunity to bring Oceans of Kansas up to date. 

IMPORTANT NOTE: As mentioned above, this website is now over twenty years old, older than some of its readers. Unfortunately, HTML technology changes rapidly and my old Microsoft FrontPage HTML editor is no longer supported. Worse yet, my two hundred plus web pages cannot be easily translated into a new text editor, and I am too old to start it over - not to mention that my cool digital photos from the early years are not so cool anymore. So the bottom line is that Oceans of Kansas cannot be updated easily, and will eventually fade from the Internet. It has been a wonderful 20 years.

Welcome to the  Oceans of Kansas Paleontology  web page.   My name is Mike Everhart and I am your host on a virtual journey more than 85 million years "back in time" to observe some of the many strange and wonderful creatures that lived in the oceans of the Earth during the final stages of the Age of Dinosaurs.  I have collected fossils from the Smoky Hill Chalk of western Kansas for the last thirty-plus years and have been an Adjunct Curator of Paleontology at the Sternberg Museum of Natural History in Hays, Kansas since 1998. I was twice President (2005 and 2015) of the Kansas Academy of Science, and have served as a co-editor of the Transactions of the Kansas Academy of Science from 2006 through the present (2017).

Currently my wife and I are managing editors of the Transactions. The TKAS is one of the oldest science journals in the United States (est. 1872).

I have conducted a Paleontology Symposium at the past eighteen annual meetings (2000-2017) of the Kansas Academy of Science (Abstracts of the 12th Paleo-symposium (2011) here), and the Second Mosasaur Meeting in May, 2007 (below).

Note that most of the information available on this website is published my 2005 book, Oceans of Kansas - A Natural History of the Western Interior Sea

(LEFT) The 2nd Edition of Oceans of Kansas is due to be published by the Indiana University Press in September, 2017. The 2nd Edition is extensively updated and 25% larger than the first edition, with more photos of fossils... and mostly in color.

Indiana University Press says, "Oceans of Kansas remains the best and only available book of its type currently available."

I am also the author of Sea Monsters - Prehistoric Creatures of the Deep, published by National Geographic in 2008. The National Geographic IMAX movie, Sea Monsters, is available on DVD and Blu-ray.




04/19/1949 - 01/01/2012



LEFT:  Tylosaurus was big enough to eat lots of other prey besides fish. One specimen in South Dakota preserves stomach contents that include the bones of another, smaller mosasaur, a marine bird (Hesperornis) and a fish.   Copyright © Dan Varner; used with permission of Dan Varner. 

Bonnerichthys gladius is a new genus of giant filter feeding fish described from the Smoky Hill Chalk by Friedman, et al. 2010 in Science (2010) and more recently in the Journal of Vertebrate Paleontology:

Friedman, M., Shimada, K., Martin, L., Everhart, M.J., Liston, J., Maltese, A. and Triebold, M. 2010. 100-million-year dynasty of giant planktivorous bony fishes in the Mesozoic seas. Science 327:990-993.

Story on the discovery by the Bonner Family in the Wichita Eagle

Chosen as one of the 100 top stories of 2010 by Discover Magazine

Friedman, M., Shimada, K., Everhart, M.J., Irwin, K.J., Grandstaff, B.S. and Stewart, J.D.  2013. Geographic and stratigraphic distribution of the Late Cretaceous suspension-feeding bony fish Bonnerichthys gladius (Teleostei, Pachycormiformes). Journal of Vertebrate Paleontology 33:35-47.

“What Should Everyone Know About Paleontology?” - Guest commentary by Thomas R. Holtz, Jr.


Although, with one known exception, dinosaurs did not live in Kansas, some of them died and floated into the Western Interior Sea over Kansas. 

LEFT: An articulated series of nine caudal vertebrae (FHSM VP-15824) in left (upper) and right lateral view from a shark scavenged hadrosaur discovered in the Smoky Hill Chalk of western Kansas by Keith Ewell, June, 2005.

RIGHT: An isolated caudal vertebra from a large Niobrarasaurus coleii (FHSM VP-17229) collected by Laura Garrett in 2007 from southwestern Trego County, KS.

2X Creality CR10 / S4 / S5 / Ender 3/4/5 pala rígida espátula pa

2nd Mosasaur Meeting

The Second Mosasaur Meeting was held at the Sternberg Museum of Natural History in Hays, Kansas, in May, 2007.

The Proceedings of the Second Mosasaur Meeting (2008)

edited by Michael J. Everhart, Sternberg Museum of Natural History, have now been published.

The contents of the volume, including the naming of two new species, are shown online here:

The 172 page volume is available for purchase at the Sternberg Museum store for $19.95 plus tax.  (Shipping per Priority Mail)

Credit card purchases can made through Brad Penka:  Phone: 785-628-5569  or   Email: Bpenka (at)  

Write Brad Penka for more information, Sternberg Museum of Natural History, 3000 Sternberg Drive, Hays, Kansas 67601-2006.

ABSTRACT BOOKLET HERE (500 KB) - The First Mosasaur Meeting, Maastricht, The Netherlands, May, 2004

3rd Mosasaur Meeting 

RECENT PUBLICATIONS (See complete list on Google Scholar):

NEW Everhart, M.J. 2017. Oceans of Kansas. Natural History Magazine 126(1):29-33.

NEW Everhart, M.J. 2017. Oceans of Kansas - A Natural History of the Western Interior Sea, 2nd Ed., Indiana University Press, 427 pp.

NEW Everhart, M.J. 2017. When the amber waves were blue. Konza Journal 51, 10 pp.

NEW Everhart, M.J. 2017. Captain Theophilus H. Turner and the unlikely discovery of Elasmosaurus platyurus. Transactions of the Kansas Academy of Science 120(3-4):233-246.

NEW Davidson, J.P. and Everhart, M.J. 2017. Scattered and shattered: A brief history of the early methods of digging, preserving and transporting Kansas fossils. Transactions of the Kansas Academy of Science 120(3-4):247-258.

NEW Everhart, M.J. 2017. Joseph Savage (1823-1891): Abolitionist, Kansas pioneer, horticulturist, fossil collector. Transactions of the Kansas Academy of Science 102(1-2):45-56.

NEW Everhart, M.J. 2016. William E. Webb – Civil War correspondent, railroad land baron, town founder, Kansas legislator, adventurer, fossil collector, author. Kansas Academy of Science, Transactions 119(2):179-192.

Everhart, M.J. 2016. Rare occurrence of a mosasaur (Squamata: Mosasauridae) remains in the Blue Hill Shale (Middle Turonian) of Mitchell County, Kansas. Kansas Academy of Science, Transactions 119(3-4):375-380.

Everhart, M.J. 2015. Elias Putnam West (1820-1892) - Lawyer, Attorney General, militia commander, judge, postmaster, archaeologist, and paleontologist. Kansas Academy of Science, Transactions 118(3-4):285-294.

Hoganson, J.W., Erickson, J.M. and Everhart, M.J. 2015. Ischyodus rayhaasi (Chimaeroidei; Callorhynchidae) from the Campanian-Maastrichtian Fox Hills of northeastern Colorado, U.S.A. Kansas Academy of Science, Transactions 118(1-2):27-40.

Ikejiri, T. and Everhart, M.J. 2015. Notes on the authorship and the holotype of the Late Cretaceous durophagous shark Ptychodus mortoni (Chondrichthyes, Ptychodontidae). pp. 69-73 in  Sullivan, R.M. and Lucas, S.G.(eds.), Fossil Record 4. New Mexico Museum of Natural History and Science Bulletin 67.

Everhart, M.J. and Pearson, G. 2014. An isolated squamate dorsal vertebra from the Late Cretaceous Greenhorn Formation of Mitchell County, Kansas. Kansas Academy of Science, Transactions 117(3-4):261-269. 

O’Gorman, J.P., Olivero, E.B., Santillana, S. and Everhart, M.J. 2014. Gastroliths associated with an Aristonectes specimen (Plesiosauria, Elasmosauridae), López de Bertodano Formation (upper Maastrichtian) Seymour Island (Is. Marambio), Antarctic Peninsula. Cretaceous Research 50:228-237.


Davidson, J.P and Everhart, M.J. 2014. Fictionalized facts; "The Young Fossil Hunters" by Charles H. Sternberg. Kansas Academy of Science, Transactions 117(1-2):41-54.


Goldfuss, A. 2013. The skull structure of the Mosasaurus, explained by means of a description of a new species of this genus. Kansas Academy of Science, Transactions 116(1-2):27-46. (Everhart, M.J., Editor) 


Cook, T.D, Wilson, M.V.H., Murray, A.M., Plint, A.G., Newbrey, M.G. and Everhart, M.J. 2013. A high latitude euselachian assemblage from the early Turonian of Alberta, Canada. Journal of Systematic Palaeontology 11(5):555-587.

Everhart, M.J. 2013. A new specimen of the marine turtle, Protostega gigasCope (Cryptodira; Protostegidae), from the Late Cretaceous Smoky Hill Chalk of Western Kansas. Kansas Academy of Science, Transactions 116(1-2):73.

Sachs, S., Kear, B.P., and Everhart, M.J.  2013. Revised vertebral count in the “longest-necked vertebrate” Elasmosaurus platyurus Cope 1868, and clarification of the cervical-dorsal transition in Plesiosauria. PLoS ONE 8(8): 6 pp.  LINK


Schumacher, B.A., Carpenter, K. and Everhart, M.J. 2013. A new Cretaceous Pliosaurid (Reptilia, Plesiosauria) from the Carlile Shale (middle Turonian) of Russell County, Kansas, Journal of Vertebrate Paleontology 33(3):613-628


Everhart, M.J. 2013. The Palate Bones of a Fish?” The First Specimen of Ptychodus mortoni (Chondrichthyes; Elasmobranchii) from Alabama. Bulletin of the Alabama Museum of Natural History 31(1):98-104.


Friedman, M., Shimada, K., Everhart, M.J., Irwin, K.J., Grandstaff, B.S. and Stewart, J.D.  2013. Geographic and stratigraphic distribution of the Late Cretaceous suspension-feeding bony fish Bonnerichthys gladius (Teleostei, Pachycormiformes). Journal of Vertebrate Paleontology 33:35-47.


Schumacher, B.A., Carpenter, K., and Everhart, M.J. 2012. A new pliosaur (Plesiosauria, Pliosauridae) from the Carlile Shale (Cretaceous, Middle Turonian) of Russell County, Kansas. Supplement to the online Journal of Vertebrate Paleontology ISSN 1937-2809, pp. 168-169.  

Vullo, R., Buffetaut, E. and Everhart, M.J. 2012. Reappraisal of Gwawinapterus beardi from the Late Cretaceous of Canada: A saurodontid fish, not a pterosaur. Journal of Vertebrate Paleontology 32(5):1198-1201.

Lindgren, J., Everhart, M.J. and Caldwell, M.W. 2011. Three-dimensionally preserved integument reveals hydrodynamic adaptations in the extinct marine lizard Ectenosaurus (Reptilia, Mosasauridae). PLoS One. 

Bell , A. and Everhart, M.J. 2011. Remains of small ornithurine birds from a Late Cretaceous (Cenomanian) microsite in Russell County, north-central Kansas. Kansas Academy of Science, Transactions 114(1-2):115-123. 

Bourdon, J. and Everhart, M.J. 2011. Analysis of an associated Cretoxyrhina mantelli dentition from the Late Cretaceous (Smoky Hill Chalk, Late Coniacian) of western Kansas. Kansas Academy of Science, Transactions 114(1-2):15-32.  

Everhart, M.J. 2011. Occurrence of the hybodont shark genus Meristodonoides (Chondrichthyes; Hybodontiformes) in the Cretaceous of Kansas. Kansas Academy of Science, Transactions 114(1-2):33-46.  

Everhart, M.J. 2011. Rediscovery of the Hesperornis regalis Marsh 1871 holotype locality indicates an earlier stratigraphic occurrence. Kansas Academy of Science, Transactions 114(1-2):59-68.  

Everhart, M.J., Hageman, S.A. and Hoffman, B.L. 2010. Another Sternberg “fish-within-a-fish” discovery: First report of Ichthyodectes ctenodon (Teleostei; Ichthyodectiformes) with stomach contents. Kansas Academy of Science, Transactions 113(3-4):197-205. 

Bourdon, J. and Everhart, M.J. 2010. Occurrence of the extinct Carpet shark, Orectoloboides, in the Dakota Formation (Late Cretaceous; Middle Cenomanian) of Kansas. Kansas Academy of Science, Transactions 113(3-4):237-242.  

Everhart, M.J. and Maltese, A. 2010. First report of a heteromorph ammonite, cf. Glyptoxoceras, from the Smoky Hill Chalk (Santonian) of western Kansas, and a brief review of Niobrara cephalopods. Kansas Academy of Science, Transactions 113:(1-2):64-70.


Everhart, M. J. 2010. Bonnerichthys gladius – The largest bony fish and first known planktivore from the Late Cretaceous. Kansas Academy of Science, Transactions 113(1-2):123-124 (abstract).

Friedman, M., Shimada, K., Martin, L., Everhart, M.J., Liston, J., Maltese, A. and Triebold, M. 2010. 100-million-year dynasty of giant planktivorous bony fishes in the Mesozoic seas. Science 327:990-993.

Shimada, K., Everhart, M.J., Decker, R. and Decker, P.D. 2009. A new skeletal remain of the durophagous shark, Ptychodus mortoni, from the Upper Cretaceous of North America: an indication of gigantic body size. Cretaceous Research 31(2):249-254.

Everhart, M.J. 2009. First occurrence of marine vertebrates in the Early Cretaceous of Kansas: Champion Shell Bed, basal Kiowa Formation. Kansas Academy of Science, Transactions 112(3/4):201-210.

Everhart, M.J. 2009. Probable plesiosaur remains from the Blue Hill Shale (Carlile Formation; Middle Turonian) of north central Kansas. Kansas Academy of Science, Transactions 112(3/4):215-221.

Everhart, M.J. and Bell, A. 2009. A hesperornithiform limb bone from the basal Greenhorn Formation (Late Cretaceous; Middle Cenomanian) of north central Kansas. Journal of Vertebrate Paleontology 28(3):952-956.

Bell, A. and Everhart, M.J. 2009. A new specimen of Parahesperornis (Aves: Hesperornithiformes) from the Smoky Hill Chalk (Early Campanian) of western Kansas. Kansas Academy of Science, Transactions 112(1/2):7-14.

Shimada, K. and Everhart, M.J. 2009. First record of Anomoeodus (Osteichthyes: Pycnodontiformes) from the Upper Cretaceous Niobrara Chalk of  western Kansas. Kansas Academy of Science, Transactions 112(1/2):98-102.

Everhart, M.J. 2008. A bitten skull of Tylosaurus kansasensis (Squamata: Mosasauridae) and a review of mosasaur-on-mosasaur pathology in the fossil record. Kansas Academy of Science, Transactions 111(3/4):251-262

Everhart, M.J. (ed.). 2008. Proceedings of the Second Mosasaur Meeting. Fort Hays Studies Special Issue 3, Fort Hays State University, Hays, Kansas, 172 pp.

Everhart, M.J. 2008. The mosasaurs of George F. Sternberg, paleontologist and fossil photographer. Proceedings of the Second Mosasaur Meeting, Fort Hays Studies Special Issue 3, Fort Hays State University, Hays, Kansas, pp. 37-46.

Polcyn, M.J. and Everhart, M.J. 2008. Description and phylogenetic analysis of a new species of Selmasaurus (Mosasauridae: Plioplatecarpinae) from the Niobrara Chalk of western Kansas. Proceedings of the Second Mosasaur Meeting, Fort Hays Studies Special Issue 3, Fort Hays State University, Hays, Kansas, pp. 13-28.

Polcyn, M.J., Bell, G.L., Jr., Shimada, K. and Everhart, M.J. 2008. The oldest North American mosasaurs (Squamata: Mosasauridae) from the Turonian (Upper Cretaceous) of Kansas and Texas with comments on the radiation of major mosasaur clades. Proceedings of the Second Mosasaur Meeting, Fort Hays Studies Special Issue 3, Fort Hays State University, Hays, Kansas, pp. 137-155.

Everhart, M.J. 2008. Rare occurrence of a Globidens sp. (Reptilia; Mosasauridae) dentary in the Sharon Springs Member of the Pierre Shale (Middle Campanian) of Western Kansas. p.  23-29 in Farley G. H. and Choate, J.R. (eds.), Unlocking the Unknown; Papers Honoring Dr. Richard Zakrzewski, , Fort Hays Studies, Special Issue No. 2, 153 p., Fort Hays State University, Hays, KS.


Cicimurri, D. J., D. C. Parris and M. J. Everhart. 2008. Partial dentition of a chimaeroid fish (Chondrichthyes, Holocephali) from the Upper Cretaceous Niobrara Chalk of Kansas, USA. Journal of Vertebrate Paleontology 28(1):34-40.


Everhart, M. J. 2007.  New stratigraphic records (Albian-Campanian) of the guitarfish, Rhinobatos sp. (Chondrichthyes; Rajiformes), from the Cretaceous of Kansas. Kansas Academy of Science, Transactions 110(3-4): 225-235.


Everhart, M. J. 2007. Historical note on the 1884 discovery of Brachauchenius lucasi (Plesiosauria; Pliosauridae) in Ottawa County, Kansas. Kansas Academy of Science, Transactions 110(3-4):255-258.


Everhart, M. J. 2007. Sea Monsters: Prehistoric Creatures of the Deep. National Geographic, 192 p.   ISBN-13: 978-1426200854


Everhart, M. J. 2007. Remains of a pycnodont fish (Actinopterygii: Pycnodontiformes) in a coprolite; An upper record of Micropycnodon kansasensis in the Smoky Hill Chalk, western   Kansas. Kansas Academy of Science, Transactions 110(1/2): 35-43.

Everhart, M. J. 2007. Use of archival photographs to rediscover the locality of the Holyrood elasmosaur (Ellsworth County, Kansas).  Kansas   Academy of Science, Transactions 110(1/2): 135-143.


Everhart, M.J. 2005. Tylosaurus kansasensis, a new species of tylosaurine (Squamata: Mosasauridae) from the Niobrara Chalk of western Kansas, U.S.A. Netherlands Journal of Geosciences / Geologie en Mijnbouw, 84(3), p. 231-240.

Oceans of Kansas is NOT about dinosaurs. Although the type specimen of Niobrarasaurus coleii was found in Kansas, this web site has very little information about dinosaurs. I do recommend some excellent dinosaur sites on the Oceans of Kansas Linkspage. For more  information about the origin of mosasaur and plesiosaur names, go to Ben Creisler's Translation and Pronunciation Guide, a recent addition to the The Dinosauria On-Line Dinosaur Omnipedia.  John Damuth's Bibliography of Fossil Vertebrates (BFV) is HERE.   Click here for the most current view on the relationships of American mosasaurs. Also go HERE for a more detailed cladogram on Mikko Haaramo's Phylogeny Archive webpage. 

For a fictional story about the daily life of a mosasaur, Manley I-Beam Connecting Rod 5.700 In Long Small Block Chevy P/N. If you are interested in fossil insects, visit Roy Beckemeyer's "Little Book Holder - Grey" webpage.

.... and for a new paleontology blog by Greg Liggett, visit the 5 Pc Lot Decorative Indian Hand Embroidered Parasol Vintage Sun

Table of Contents Handy paleo-reference page   Search with Google

Can you identify these tiny teeth?

Fusulinids in a chert arrowhead

Mystery skull - Can you identify it?

Flat-bed scanner to "photograph" small fossils

Invertebrate feeding traces on shark teeth?

Unidentified Pennsylvanian nautiloid

If you would like to learn more about paleontology in Kansas, you might consider joining the Kansas Academy of Science,  It's inexpensive ($35 per year) and we have a variety of paleontology papers in the process of being published. Click here for an updated  list of  KAS publications on paleontology

Follow the KAS on Facebook





The 18th Annual Paleontology Symposium


will be held at the 149th Annual Meeting 
of the Kansas Academy of Science, 
Saturday, April 8, 2017 
Fort Hays State University, Hays, Kansas

See abstracts from the 2014 Paleo-symposium here


 Larry Dean Martin (1943-2013) - Renaissance Paleontologist (PDF - 1.8 MB)


LEFT:  Well known  paleontologists who have discovered fossils in Kansas  

Systematics and morphology of American mosasaurs

by Dale Russell

"The best publication about mosasaurs"

The Yale Peabody Museum Publications Office is pleased to announce that the 1967 monograph, "Systematics and Morphology of American Mosasaurs" by Dale Russell, Peabody Museum of Natural History, Yale University, Bulletin 23, is now available as a facsimile reprint through the Yale Peabody Museum web site.

The museum regularly receives requests for this title, which is the first of several of out-of-print publications that will be made available to the worldwide academic community through Yale's print-on-demand service.  (Go to the Publications link at
QUICK SITE INDEX Smoky Hill Chalk Field Guides:   LTM220MT12 22'' 1680×1050 Resolution LCD screen Panel;   Fish;   Marine Reptiles;   Pteranodons, Dinosaurs and Birds;    Northern 246110 Mitsubishi Caterpilla​r FGC GC Forklift Radiator
General TABLE OF CONTENTS About Oceans of Kansas Smoky Hill Chalk Field Guide:(1) Links other paleo sites Paleo-fiction: Mosasaur story Paleo-fiction: A moment in time Want to be a paleontologist? My first chalk fossils Smoky Hill Chalk Photographs My Abstracts
Mosasaurs 1 Ben Creisler's Mosasaur Pronunciation Guide NEW About mosasaurs Tylosaurus proriger 1996-7 Tylosaurus nepaeolicus Tylosaurus kansasensis nov. sp. Platecarpus tympaniticus Selmasaurus johnsoni New Species Plioplatecarpus mosasaur Clidastes propython Clidastes liodontus
Mosasaur 2 The first mosasaur UPDATED Mosasaur virtual museum Globidens mosasaur Halisaurus sternbergi A North Dakota mosasaur SDSM Prognathodon Last of the great marine reptiles Kansas Mosasaur Biostratigraphy Prognathodon  in Kansas ?   Remains of young mosasaurs  The brain of mosasaurs
Mosasaur 3 Mosasaur pathology The Bunker Tylosaur Tylosaurus ate Plesiosaurs The Origin of the mosasaur fringe Williston's mosasaurs C. H. Sternberg's Platecarpus   Leidy on mosasaur teeth Rapid evolution of mosasaurs  Mosasaurs in Sweden NEW  Ectenosaurus clidastoides
Plesiosaur1 About plesiosaurs (Elasmosaurs) About  pliosaurids and polycotylids Coal Oil Canyon plesiosaur Plesiosaur gut contents Plesiosaur gastroliths Plesiosaur dig: 1998 Plesiosaur dig: 1999 Where the elasmosaurs roam Kiowa Shale Plesiosaurs New - The Last Pliosaur in Kansas
Plesiosaur2 eHistory of North American   plesiosaurs Brachauchenius lucasi - pliosaurid Kansas Plesiosaurs Ben Creisler's Plesiosaur Pronunciation Guide NEW SDSM Styxosaurus Longest Neck in the Ocean Elasmosaurus platyurus New Elasmosaurus - The rest of the story? Bottom feeding plesiosaurs? Kronosaurus queenslandicus
Plesiosaur3 Plesiosaur skull anatomy Plesiosaurs in Wards Scientific Snake through the shell of a turtle? First records of   plesiosaurs KUVP 5070 - Trinacromerum bentonianum KUVP 1300 Dolichorhynchops osborni FHSM VP-404 Dolichorhynchops osborni KUVP 40001 Dolichorhynchops bonneri FHSM VP-16459 Fort Hays Limestone   plesiosaur

Bony Fish Giant fish: Xiphactinus audax Pachyrhizodus Cimolichthys nepaholica Enchodus: Sabre tooth  fossil fish Mystery fish: Martinichthys Saurocephalus & Saurodon  Protosphyraena Swordfish NEW   Pachycormid: Bonnerichthys gladius Plethodid: Pentanogmius   Plethodids
Sharks 1 Cretoxyrhina and Squalicorax Ginsu Shark: Cretoxyrhina Shark bites _ Cretoxyrhina   Sharks and mosasaurs Ptychodontid sharks Ptychodus mortoni crusher shark Ptychodus teeth by the hundreds NEW - Earliest Ptychodus mortoni Pycnodonts and Hadrodus

Sharks 2 Kansas sharks - Overview of teeth Ctenacanthus -A  Permian shark Permian Sharks of Kansas 1940  shark tooth   collection Chimaeroids: Ratfish  - JVP 2008 Discovery! A Giant Ginsu Shark NEW - Cretodus crassidens NEW- Ptychodus mortoni specimen

Other Fauna Pteranodon and Nyctosaurus Dig for a Pteranodon sternbergi - 1996 Pteranodons and Birds Ichthyornis -"Fishbird" A bird called Hesperornis Hesperornis regalis Marsh 1872 Baptornis advenus, marine bird Marine Turtles: Toxochelys & others Desmatochelys Dig for Fairport Chalk Turtle Protostega gigas: 2011 Discovery
Museums FHSU Sternberg Museum: The Virtual Tour University of Kansas-Bunker mosasaur South Dakota School of Mines - Museum  of Geology Denver Museum of Nature and Science University of Oklahoma Sam Noble Museum University of Nebraska - State Museum Rocky Mountain Dinosaur Resource Center Maastricht Mus.: Netherlands mosasaur Niobrarasaurus: Chalk  dinosaur Another Kansas dinosaur discovery
Historical Harlan's (1834) 'Ichthyosaurus' Goldfuss (1845) Mosasaurus 11 PCS Sewing Machine Presser Foot-Set Domestic Sewing Machine F Dr. George M. Sternberg, U.S. Army Dr. Theophilus H. Turner, U.S. Army Dr. John H. Janeway U.S. Army Charles H. Sternberg History of chalk collecting -1898 B. F.  Mudge and Williston debate the origin of birds

Reference Marine reptile references Fish and other references Paleo ePapers on the Internet Goldfuss 1845 Translation Abstracts,  4th Annual   Paleo Symposium-2003 Abstracts,  5th Annual Paleo Symposium- 2004 Abstracts,  6th Annual Paleo Symposium- 2005 Abstracts,  7th Annual Paleo Symposium-  2006 Abstracts, 9th Annual Paleo Symposium - 2008 Abstracts, 10th Annual Paleo Symposium   2009
ePapers Cope 1872: Expedition to Kansas Leidy 1859: Kansas Permian Sharks Marsh 1871: First Pteranodon Marsh 1872: Ichthyornis dispar Snow 1878: Skin of Tylosaurus Williston 1891: Kansas Mosasaurs H.F. Osborn 1899 Mosasaur Williston 1898: Cretaceous birds

Artwork Dan Varner: Paleo-life art Paleo-art by Doug Henderson Art by Russell Hawley

Inoceramids - Giant Cretaceous clams Mosasaurs from Antarctica
Other Giant Ichthyosaurs: Shonisaurus New Jersey Paleo Society Trip -2001 Placodonts: "Walrus Turtles" Kansas Ammonites Uintacrinus - Late Cretaceous crinoids Fossil wood and other remains Coprolites and gut contents Elusive K-squid... Tusoteuthis.. Kansas Crocodiles New Zealand marine reptiles

  Oceans of Kansas webpages (mostly about sharks) translated into French by Jean-Michel Benoit 


07/05/2012 Ben Creisler's Plesiosaur Pronunciation Guide - Moved to Oceans of Kansas

07/05/2012 Ben Creisler's Mosasaur Pronunciation Guide - Moved to Oceans of Kansas

01/02/2012 The Last Pliosaur - Megacephalosaurus eulerti discovered in the Blue Hill Shale

11/28/2011 Inoceramids - Giant Cretaceous clams from the Smoky Hill Chalk

11/16/2011 Ectenosaurus clidastoidesmosasaur with preserved skin

10/24/2011 Protostega gigas - A new discovery in the Smoky Hill Chalk of Gove County

08/15/2011 Kiowa Shale Field Trip:  Plesiosaurs

07/15/2011 Tusoteuthis longa - The elusive Niobrara squid....

05/10/2011 Kansas Crocodiles - Life along the edge of the Western Interior Sea

10/27/2010 Ptychodus mortoni - New shell crushing shark specimen from the Smoky Hill Chalk

06/09.2010  Cretodus crassidens - Late Cretaceous Shark Collected from the Blue Hill Shale of Mitchell County, Kansas

04/19/2010  Kansas Ammonites.... - Something like a squid in a coiled shell

10/26/2008  Remains of young mosasaurs from the Smoky Hill Chalk -  It was a dangerous place to be born....

09/13/2008  Digging up a large turtle in the Fairport Chalk - Probable first collection of the skull of Desmatochelys lowii from Kansas.

09/10/2008  The brain and back of the skull of mosasaurs - A primer on the complicated anatomy....

07/13/2008   First polycotylid plesiosaur from the Fort Hays Limestone - (Early Coniacian) - Jewell County, Kansas.

04/27/2008   Baptornis advenus Marsh 1877, a marine bird from the western Interior Sea. (Smaller, more primitive than Hesperornis.

04/18/2008   A complete mosasaur skeleton - Osseous and cartilaginous. Osborne, 1899 - Early photographs of Tylosaurus proriger

OEM DAMPER FOR MUTOH VALUEJET 1324, 1624,1638, 2638, 628 DG-4154


PalArch - Web-based scientific journal The Paleontology Portal - Lots of fossil specimens Greg Liggett's  White House Black Market Women's Sz 4 Brown Mid Rise Zebra Skinn

Robert Randell's British Chalk Fossils

Richard Forrest's

Adam Smith's The Plesiosaur Directory

Kansas fossils and geology

Nebraska Invertebrates

Roy Beckemeyer's Propeller Shaft Drive Shaft 26117655802 BMW R 1150 R Rockster GS - Fossil insects

Ammonites (in French)

Rudists (Durania maxima)

NEW More insects from the Eocene Green River Formation - NW Colorado


Paleontology Museums
There are also many links to other excellent paleo web pages and museum sites around the world, so please plan on taking some time to see what is available. Also, don't forget to bookmark this page so that you can come back occasionally to see what has been added. The two best ways to 'surf' the Oceans of Kansas site are to use the Table of Contents pages, or the Links to this site and other paleontology web pages. There are also 'hyper-links' embedded in the text on most of the pages that will take you to other sub-pages for more information on that subject. These links are highlighted in a different color (light blue) and are 'click-able'.   From the Links page, you can surf the net to sites all over the world, but please take a tour of Oceans of Kansas Paleontology first. To get things started, let's take a look at:

Click  on the Pteranodon to take the unofficial Oceans of Kansas


A "virtual tour" of  the

 Sternberg Museum of Natural History (Click for official web page)


Yes, Virginia, there were lots of sharks in Kansas

Click here to see more of Doug Henderson's Paleo-Life Art



You can now download a FREE  pdf copy of this early article on Kansas Sharks by Williston - Provided by the Kansas Geological Survey.

Williston, S. W. 1900. Cretaceous fishes: Selachians and Pycnodonts. University Geological Survey Kansas VI pp. 237-256, with pls.

The Cretaceous Period lasted from about 144 million years ago to 65 million years ago.   In Kansas, it is represented by marine and estuarine deposits from the Early Cretaceous  (Albian) Cheyenne Sandstone and Kiowa Shale that overlay the Wellington Formation  (Permian) or the Morrison Formation (Jurassic) at the base, to the Pierre Shale at the top. (See Kansas Geology Map and 2 Pieces Table Football Table Football Counter Scorer Goalkeeper).   A brief Cretaceous Time Scale is found here. The 1999 version of the GSA (Geological Society of America) geologic time scale is found HERE as a printable .pdf file (233 kb).

A major part of the upper portion (Late Cretaceous) of these deposits is referred to as the Niobrara Formation.  It contains a rather unique member called the Smoky Hill Chalk, and provides the exposures for two Kansas landmarks: Castle Rock and Monument Rocks. The chalk found in Kansas was deposited between 87 and 82 million years ago during a period when a shallow inland sea (the Western Interior Sea) covered most of the Midwest from the Gulf of Mexico to the Arctic Circle.  The deposition of these chalky, marine sediments occurred during the last half of the Cretaceous Period, approximately 15-20 million years before the end of the Age of Dinosaurs.  

The Smoky Hill Chalk member is about 600 feet thick in Kansas, and lies conformably above the Fort Hays Limestone, and below the Pierre Shale. For the most part, the chalk is composed of the compacted shells (coccolithophores) and plates (coccoliths) of an abundant, microscopic, golden-brown algae (Chrysophyceae) that lived in the clear waters of a warm, shallow sea. A large percentage of the chalk is  made up of coprolites containing coccoliths from the animals that fed on the algae. 

More photos of the Smoky Hill Chalk HERE.

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A generalized map of the North American continent during late Cretaceous time. The Western Interior Sea covered most of the Midwest from the present Gulf of Mexico to the Arctic. (Map modified from an exhibit at the University of Nebraska State Museum)

The Western Interior Sea,sometimes called the Inland Sea, was probably less than 600 feet deep in most areas, and had a relatively flat and soft, mud bottom. It is considered to be an 'epi-continental sea'; that is, one which lies on top of a continental landmass, and not between continents.   Near the middle of the sea where Kansas is now located, sediments were deposited at a rate which would ultimately produce about one inch of compacted chalk for every 700 years. The chalk also has more than a hundred thin layers of bentonite clay, most of which are rusty red in color, that are the result of the fall of ash from repeated eruptions of volcanoes to the west of Kansas in what is now Nevada and Utah. These ash deposits can be traced for miles across the chalk beds and have been used as marker units in describing the stratigraphy of the formation (See Hattin, 1982). In addition, several species of vertebrate and invertebrate marine life that lived and/or became extinct at certain times during the deposition of the chalk are useful in determining the age and biostratigraphy of widely separated exposures (See Stewart, 1990). Near the end of the Cretaceous, the Western Interior Sea began to close, becoming shallower and narrower as the Rocky Mountains were pushed up from the west, uplifting the sea bottom as they rose.  Eventually, the center of North America rose above sea level and the sediments (limestones, sandstones, shales and chalk) deposited on the basement rocks of Kansas for nearly half a billion years began to erode away.

A map of Kansas showing the surface and sub-surface distribution of the remaining Cretaceous rocks (adapted from the Kansas Geological Survey Bulletin 162; 1963).  Although Kansas was once nearly covered with Cretaceous marine deposits, millions of  years of erosion have removed a large portion of them them from the surface, leaving many areas of chalk exposed along river valleys in the northwest portion of the State. Go here for more information on Kansas Geology.


KANSAS FOSSILS -  Kansas Geological Survey 



This shallow ocean was home to a variety of marine animals, almost all of which are now extinct. These included giant clams, rudists, crinoids, squid, ammonites, numerous sharks and bony fish,turtles, plesiosaurs, mosasaurs , Pteranodons and even several species of marine (toothed) birds. Although it seems unlikely that you would find dinosaur fossils in the middle of the Western Interior Sea, a number of them (a hadrosaur found by O. C. Marsh in 1871, and several nodosaurs, includingthe type specimen of Niobrarasaurus coleii) have been collected from the Smoky Hill Chalk, and their remains have been well documented. The bodies of these dinosaurs must have somehow floated hundreds of miles into the sea before sinking to the bottom or being torn apart by scavenging sharks. It is possible that they died during catastrophic flooding on the land masses to the east or west, and were carried out to sea on a large, tangled mat of trees and other vegetation (fossilized wood, including large logs, is also known from the chalk).

Over a period of about five million of years, the remains of many of these animals were preserved as fossils in the soft, chalky mud of the sea bottom. When this mud was compressed under thousands of feet overlying shale, it became a deposit of chalk that is more than 600 feet thick in Western Kansas. Most of the massive chalk formation that once covered Kansas, however, has been eroded away over the last 60 million years and is now exposed only in a relatively small area in the northwestern corner of the State. This part of Kansas is also known as the Smoky Hills.

Since 1868 and the discovery of Tylosaurus proriger, the Smoky Hill Chalk has been the source of thousands of fossil specimens, many of which are on exhibit today in museums around the world. The first significant collections of Kansas fossils were made by relatively unknown scientists like Professor Benjamin F. Mudge, Dr. George M. Sternberg, Dr. John Janeway, and Dr. Theophilus H. Turner.  Many others  were collected by and for such famous paleontologists as Edward Drinker Cope, O. C. Marsh, Samuel W. Williston, and Charles Sternberg, (for more information on the Sternberg family, click here),  including a large portion of the Yale Peabody Museum collection that resulted from the Yale College Scientific Expeditions of the 1870s. For some 'old time' advice on collecting fossils, see an 1884 article by Charles H. Sternberg here. Much of the early work on mosasaurs in Kansas was published in The University Geological Survey of Kansas in the late 1890's.  A large number have been found since then by amateur collectors and many of these have been significant additions to paleontology.  The Sternberg Museum of Natural History at Fort Hays State University,  the Museum of Natural History at The University of Kansas, and the University of Nebraska State Museum have excellent collections of fossils from the Smoky Hill Chalk. The Denver Museum of Nature and Science, the Sam Noble Museum of Natural History in Norman, Oklahoma, the Field Museum of Natural History in Chicago, the Philadelphia Academy of Natural Sciences, and the American Museum of Natural History also have many Kansas fossils.  Click here for additional information about some early American paleontologists


Oceans of Kansas is now available as a book.


OCEANS OF KANSAS - A Natural History of the Western Interior Seaby Michael J. Everhart, published June, 2005 by the Indiana University Press   ISBN: 0253345472  "A journey to a time when sea monsters roamed the middle of America"

Oceans of Kansas was named the featured book from Kansas for the 2006 National Book Festival in Washington, D.C. It was also a featured book of the Discovery Channel Book Club and is currently in its 3rd Printing by the Indiana University Press... over 6000 copies sold!

My Acknowledgments....

RIGHT: Photo by Cheryl Unruh of Flyover People from a book-signing in June, 2007.  Used with permission:

Sea Monsters: Prehistoric Creatures of the Deep

By Mike Everhart

Awarded 2008 by the American Library Association 

Awarded as a 2008 Kansas Notable Book

[ VIDEODr. Larry Martin

National Geographic Sea Monsters Page

Proceedings of the Second Mosasaur Meeting

Edited by Michael J. Everhart

Published by Fort Hays State University, 2008

172 pp.

King of the



The Paleobiology of Deinosuchus

David R. Schwimmer

Published 2002 by the Indiana University Press, 220 pages


A History of Paleontology Illustration

Jane P. Davidson

Published 2008 by the Indiana University Press,

217 pages

Soft TPU Car Remote Key FOB Cover Case For Renault Symbol Trafic



In Memoriam: Dale Allan Pulliam, 1946-1967, U.S.M.C.