Episode 167 – Geologic Dating

What this episode covers

When scientists find a new rock formation or fossil assemblage, how do they determine how old it is? The answer lies in the many varied methods of geologic dating. In this episode, we’ll discuss how we can sort the events in Earth history, how we calculate specific ages for ancient materials – including a deep-dive into radiometric dating! – and most importantly, how these many techniques support and complement each other. In the news: gaze following, polar pterosaurs, pachycephalosaur heads, and giant marsupials. Time markers:Intro & Announcements: 00:00:00News: 00:06:50Main discussion, Part 1: 00:38:45Main discussion, Part 2: 01:31:10Patron question: 02:20:18 Check out our blog for bonus info and pictures:http://commondescentpodcast.com/ Trans Lifeline connects trans people to community support and resources:https://translifeline.org/ Join us on Patreon to support the podcast and enjoy bonus content! https://www.patreon.com/commondescentpodcast We’re an Audible Affiliate Partner! Use this link for a 30-day free trial to Audible: https://www.audibletrial.com/CommonDescent Or make a one-time donation via PayPal: https://tinyurl.com/4c68u4hp Find merch at the Common Descent Store! http://zazzle.com/common_descent Join the Common Descent Discord server! https://discord.gg/CwPBxdh9Ev Follow and Support us on:Twitter: https://twitter.com/CommonDescentPCFacebook: https://www.facebook.com/commondescentpodcastInstagram: https://www.instagram.com/commondescentpodcast/ YouTube: https://www.youtube.com/channel/UCePRXHEnZmTGum2r1l2mduwPodBean: https://commondescentpodcast.podbean.com/ You can email us at commondescentpodcast(at)gmail.comOr send us physical mail at:The Common Descent Podcast1735 W State of Franklin Rd. Ste 5 #165Johnson City, TN 37604 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/

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