The Mystery Behind Earth’s Missing Rocks: Crash Course Geology #16

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How did over one billion years of history go missing? In this episode of Crash Course Geology, we’ll tour the Grand Canyon and discover how geologists read its rocky layers like chapters in Earth’s biography. We’ll also explore theories about why some of those chapters have disappeared. Introduction - The Grand Canyon 00:00 Strata and Sediment 0:30 Understanding Earth’s Geological Record 3:39 Unconformities 7:30 Review & Credits 10:08 Sources: https://docs.google.com/document/d/1RpwM8ZQPFk_DkzMJjMdtRrNGrJSNJ7FbgmQybSZ2Cqo/edit?tab=t.0 Check out our CC Geology Extracurricular Playlist here: https://www.youtube.com/playlist?list=PL8dPuuaLjXtOmqnkvEtNVOrm0eaIjFjJ7 *** Support us for $5/month on Patreon to keep Crash Course free for everyone forever! https://www.patreon.com/crashcourse Or support us directly: https://complexly.com/support Join our Crash Course email list to get the latest news and highlights: https://mailchi.mp/crashcourse/email Get our special Crash Course Educators newsletter: http://eepurl.com/iBgMhY Thanks to the following patrons for their generous monthly contributions that help keep Crash Course free for everyone forever: b.sav, Martin G. Diller, Scezumin, Johnathan Williams, Mike Cumings, Jr., Allison Wood, NassauLinda, Chuck Smith, Katrix , Jason Terpstra, Jennifer Wiggins-Lyndall, Dalton Williams, DexcilaDou, Chelsea S, Matthew Fredericksen, AThirstyPhilosopher ., Scezumin, AThirstyPhilosopher ., Emily Beazley, Andrew Woods, DexcilaDou, Roger Harms, UwU, Johnathan Williams, Kyle & Katherine Callahan, Stephen Akuffo, Jennifer Wiggins-Lyndall, Shruti S, Barbara Pettersen, Gina Mancuso, Dalton Williams, Toni Miles, Mike Cumings, Jr., Quinn Harden, Michael Maher, Jason Terpstra, Matthew Fredericksen, Rie Ohta, Chuck Smith, Allison Wood, David Fanska, Katrix , Chelsea S, b.sav, Brandon Thomas, Steve Segreto, Elizabeth LaBelle, Reed Spilmann, Leah H., NassauLinda, Kevin Knupp, Martin G. Diller, Ken Davidian, oranjeez, Laurel Stevens, Jason Buster, Alan Bridgeman, Samantha, Jason Rostoker, Breanna Bosso, Caleb Weeks, Joseph Ruf, Ken Penttinen, Luke Sluder, Wai Jack Sin, Siobhán, Krystle Young, Matt Curls, Stephen McCandless, Eric Koslow, John Lee, Tandy Ratliff, Perry Joyce, Sarah & Nathan Catchings, Rizwan Kassim, Katie Dean, Ian Dundore, team dorsey, Erminio Di Lodovico, Barrett, Trevin Beattie, Bernardo Garza, Kristina D Knight, Nathan Taylor, Emily T, Constance Urist, Jennifer Killen, Thomas, Alex Hackman, Triad Terrace, Indija-ka, Evol Hong, Scott Harrison, Pietro Gagliardi, Les Aker, Tanner Hedrick __ Want to find Crash Course elsewhere on the internet? Instagram - https://www.instagram.com/thecrashcourse/ Facebook - http://www.facebook.com/YouTubeCrashCourse Bluesky - https://bsky.app/profile/thecrashcourse.bsky.social CC Kids: http://www.youtube.com/crashcoursekids