Episode 71 - The Western Interior Seaway

The Common Descent Podcast

Common Descent

Science, Natural Sciences, Education, Earth Sciences, Science:natural Sciences

4.8 • 764 Ratings

🗓️ 6 October 2019

⏱️ 103 minutes

🔗️ Recording | iTunes | RSS

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Summary

During the Cretaceous Period, North America flooded. The entire middle section of the continent was submerged, creating an inland sea that stretched from the Arctic to the Gulf of Mexico and hosted a unique and fascinating underwater ecosystem. Not only that, but it split west from east, creating two distinct "subcontinents." In this episode, we explore how this sea came to be, what lived within it, and what effect it had on land ecosystems of the time and the fossil record they left behind. In the news: more crocs, the oldest fossils, a history of CO2, and unexpected fossil sex. Time markers: Intro & Announcements: 00:00:00News: 00:04:30Main discussion, Part 1: 00:33:00Main discussion, Part 2: 01:11:00Patron question: 01:35:00 Check out our blog for bonus info and pictures:http://commondescentpodcast.wordpress.com/ The Common Descent Store is open! Get merch! http://zazzle.com/common_descent Follow and Support us on: Patreon: https://www.patreon.com/commondescentpodcast Twitter: https://twitter.com/CommonDescentPCFacebook: https://www.facebook.com/commondescentpodcast/PodBean: https://commondescentpodcast.podbean.com/ iTunes: https://itunes.apple.com/us/podcast/the-common-descent-podcast/id1207586509?mt=2YouTube: https://www.youtube.com/channel/UCePRXHEnZmTGum2r1l2mduw The Intro and Outro music is “On the Origin of Species” by Protodome. More music like this at http://ocremix.org. Musical Interludes are "Professor Umlaut" by Kevin MacLeod (incompetech.com). Licensed under Creative Commons: By Attribution 3.0http://creativecommons.org/licenses/by/3.0/

Transcript

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0:00.0	You're listening to the Common Descent Podcast.
0:19.0	Hey, Will. Hello, David.
0:21.3	Hello, listeners.
0:22.8	Welcome back to the Common Descent podcast for episode 71.
0:27.3	71.
0:28.2	71.
0:29.2	This episode, we are discussing a topic that will get us into geology a little bit.
0:35.7	Ooh, rocks.
0:36.7	And Earth history and broad extinct ecosystems.
0:42.0	The Western Interior Seaway.
0:45.0	This one's exciting because I don't, I know what this is, but I don't know a lot about it.
0:48.6	So I think a lot of our listeners might be saying, oh, cool, the Western Interior Seaway.
0:52.8	And a lot of other listeners might be saying,
0:54.8	what?
0:55.3	The Western Interior where?
0:57.0	Why, the who now?
0:58.3	So, for those who are unfamiliar, the quick version is, during the Cretaceous period, largely
1:04.3	in the Cretaceous period, when the dinosaurs roamed and Mosasers swam the seas and such, North
1:10.5	America was bisected by the ocean yeah it was it was
1:13.7	split in half it was and indeed if you go to if you look for cretaceous rocks particularly late
1:19.7	cretaceous but very famously in north america like it's dinosaurs on land in alberta and in far to the west and in New Jersey and in the
1:31.6	eastern states but in like Kansas it's ocean because the sea level through a variety of
	...

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