When Sharks Swam the Great How a Supervolcano Made the Cenozoic’s Coolest 1 day ago   12:41

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PBS Eons
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If you’ve ever been to, or lived in, or even flown over the central swath of North America, then you’ve seen the remnants of what was a uniquely fascinating environment. Scientists call it the Western Interior Seaway, and at its greatest extent, it ran from the Caribbean Sea to the Canadian Arctic.

Thanks to Dmitry Bogdanov, Nobu Tamura, C.R. Scotese, NASA and the many others listed throughout the video for making their images available to use.

Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

Super special thanks to the following Patreon patrons for helping make Eons possible:

Katie Fichtner, Anthony Callaghan, Neil H. Gray, Marilyn Wolmart, Esmeralda Rupp-Spangle, Gregory Donovan, Ehit Dinesh Agarwal, سلطان الخليفي, Gabriel Cortez, Marcus Lejon, Anel Salas, Robert Arévalo, Robert Hill, Kelby Reid, Todd Dittman, Betsy Radley, PS, Colin Sylvester, Philip Slingerland, John Vanek, Jose Garcia, Eric Vonk, Tony Wamsley, Henrik Peteri, Jonathan Wright, Jon Monteiro, James Bording, Brad Nicholls, Miles Chaston, Michael McClellan, Jeff Graham, Maria Humphrey, Nathan Paskett, Connor Jensen, Sapjes, Daisuke Goto, Hubert Rady, Yuntao Zhou, Gregory Kintz, Tyson Cleary, Chandler Bass, Maly Lor, Joao Ascensao, Tsee Lee, Sarah Fritts, Ruben Winter, Ron Harvey Jr, Jacob Gerke, Alex Yan

If you'd like to support the channel, head over to http://patreon.com/eons and pledge for some cool rewards!

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References:
Oceans of Kansas: A Natural History of the Western Interior Seaway (Second Edition) by Michael J. Everhart.
https://www.tandfonline.com/doi/abs/10.1080/02724634.2014.838573?journalCode=ujvp20#.U8BQ-61OURY
https://www.researchgate.net/publication/259517413_Cretaceous_Eustasy_Revisited
https://www.researchgate.net/profile/Joshua_Slattery/publication/280641436_EARLY_CRETACEOUS_TO_PALEOCENE_PALEOGEOGRAPHY_OF_THE_WESTERN_INTERIOR_SEAWAY_THE_INTERACTION_OF_EUSTASY_AND_TECTONISM/links/55c0927208aed621de13c50d/EARLY-CRETACEOUS-TO-PALEOCENE-PALEOGEOGRAPHY-OF-THE-WESTERN-INTERIOR-SEAWAY-THE-INTERACTION-OF-EUSTASY-AND-TECTONISM.pdf
https://www.researchgate.net/publication/321632109_The_Late_Cretaceous_Western_Interior_Seaway_as_a_model_for_oxygenation_change_in_epicontinental_restricted_basins
https://www.tandfonline.com/doi/abs/10.1080/02724634.2011.601714
https://www.jstor.org/stable/1306568
https://www.sciencedirect.com/science/article/pii/003101829090110S
https://pubs.er.usgs.gov/publication/pp1561
http://rspb.royalsocietypublishing.org/content/278/1706/681.short
https://link.springer.com/article/10.1007%2FBF02990187
https://pubs.geoscienceworld.org/gsa/geology/article-abstract/44/11/903/195080/temperature-and-salinity-of-the-late-cretaceous?redirectedFrom=fulltext
https://www.rushcounty.org/PostRockMuseum/PostRockMuseum2.htm

Comments 982 Comments

Textured Frog
"...It had sharks with teeth-like kitchen knives..." 😂😂😂
Johnny Okeeffe
I live in Nebraska and we would always go fossil hunting. It’s a great time and it’s so cool to find shark teeth in the middle of nowhere lol
revinevan87
your C sounds are piercing and unbearable
Blitznstitch2
I live on the great plains. Limestone hills and lots and lots of sea life fossils. Can just pick it up off the ground.
Tara Josem
Dear PBS Eons, please make an episode about the Australian megafauna!
harry walker
when was king george around,??.didnt he kill a dragon,in story,.??.or was it a dinasour,dragon,there are stories of them world wide,there not extinct,go visit the congo.man was around with dinasours,why arnt we extinct.hu,eh??answer that.your history is flawed,[just ask a borg]
Kiwi Borb
I bless the rains down in Africa
Shane Ellis
I'm just wondering (I'm high as fuck) but what makes people pronounce certain words oddly my grammar sucks cuz my wrist is broke sorry love the video
PoptartInvasion
How are you simply wearing jeans, boots, and a tee and still killing it? SLAY!
onewheelnation the Bell show
the plates
onewheelnation the Bell show
there part of back ribs
Quinn Von Kerman
Squalicorax's teeth look very similar to a Tiger Shark's teeth.
Richard Acosta
God you're beautiful...
James Erickson
She's so pretty.
Charlie McGrath
Can you do an episode on aquatic ape theory/Saharan ape theory!
Funny Face Megee
When they show Kansas city im so happy even though this means nothing to anyone else
TheMatron'sMilitia
Xyphactinus ate fish half it's size whole? Sounds like a pike
Austin Curry
"Bigger predators don't always go after bigger prey." Look at modern baleen whales, the largest animals to ever exist eat some of the smallest animals to ever exist.
danny5551000
I NEED THAT SHIRT!
Ladyhawk Misses Gabby
9:35 Those look a hell of a lot like tiger shark teeth. I looked up Squalicorax teeth and it seems they came in various shapes, but some (like these) look very much like those of the modern tiger shark. I'm sure it's just convergent evolution...isn't it?
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How a Supervolcano Made the Cenozoic’s Coolest When Sharks Swam the Great 1 day ago   09:39

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One of the most dynamic, transformative, and potentially dangerous features in North America is also responsible for some of the continent’s most amazing fossil deposits. It’s a supervolcano we now call Yellowstone.

Thanks to Rick Otto and the Ashfall Fossil Beds State Historical Park for their help with this episode!

Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

Super special thanks to the following Patreon patrons for helping make Eons possible:
Katie Fichtner, Aldo Espinosa Zúñiga, Kelby Reid, Steph Summerfield, Todd Dittman, Betsy Radley, Svetlana Pylaeva, Colin Sylvester, Philip Slingerland, John Vanek, Jose Garcia, Noah offitzer, Eric Vonk, Tony Wamsley, Henrik Peteri, Jonathan Wright, Wilco Verweij, Jon Monteiro, James Bording, Brad Nicholls, Miles Chaston, Michael McClellan, Elysha Nygård, Jeff Graham, Maria Humphrey, Nathan Paskett, Connor Jensen, Ehit Dinesh Agarwal, Sapjes, Daisuke Goto, Zachary Winkler, Hubert Rady, Yuntao Zhou, Gregory Kintz, Tyson Cleary, Chandler Bass, Maly Lor, Joao Ascensao, Tsee Lee, Sarah Fritts, Ruben Winter, Ron Harvey Jr, Joshua Mitchell, Johnny Li, Jacob Gerke, Katie M Vasilescu, Brandon Burke, Alex Yan

If you'd like to support the channel, head over to http://patreon.com/eons and pledge for some cool rewards!

Want to follow Eons elsewhere on the internet?
Facebook - https://www.facebook.com/eonsshow
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References:
https://www.researchgate.net/publication/300919200_The_geology_and_paleontology_of_Ashfall_Fossil_Beds_a_late_Miocene_Clarendonian_mass-death_assemblage_Antelope_County_and_adjacent_Knox_County_Nebraska_USA
https://www.journals.uchicago.edu/doi/10.1086/587650
https://www.ncbi.nlm.nih.gov/pubmed/14711425
https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2013JB010483
https://www.ncbi.nlm.nih.gov/pubmed/1684053
https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/92GL00703
https://volcanoes.usgs.gov/volcanoes/yellowstone/yellowstone_sub_page_54.html
https://www.floridamuseum.ufl.edu/files/1013/9447/0047/bulletin-Mihlbachlerlowres.pdf
https://peerj.com/articles/4880/
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0044205
https://www.scientificamerican.com/article/the-secrets-of-supervolca-2006-06/
https://link.springer.com/article/10.1007/s00445-007-0140-7
https://pubs.er.usgs.gov/publication/70117448
https://www.frontiersin.org/articles/120148
https://www.researchgate.net/publication/280296629_An_introduction_to_the_stratigraphy_structural_geology_and_hydrogeology_of_the_Columbia_River_Flood-Basalt_Province_A_primer_for_the_GSA_Columbia_River_Basalt_Group_field_trips
http://volcano.oregonstate.edu/columbia-river-flood-basalts
https://www.researchgate.net/publication/298429576_Volcanic_Ash_Layers_in_the_Miocene_Lake_Clarkia_Beds_Geochemistry_Regional_Correlation_and_Age_of_the_Clarkia_Flora
https://pubs.geoscienceworld.org/gsa/gsabulletin/article/62/8/907/4450/mold-of-a-rhinoceros-in-basalt-lower-grand-coulee
Mustoe, George. “Washington’s Fossil Forests.” 2001
http://www.dnr.wa.gov/Publications/ger_washington_geology_1988_v16_no4.pdf