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Life in the Cambrian & Ordovician ~542-444 mya | GEO GIRL

What was Early Paleozoic Life like? This video goes through all major life events and organisms present during the Cambrian and Ordovician periods of the Early Paleozoic Era. References: Earth System History: https://amzn.to/3v1Iy0G GEO GIRL Website: https://www.geogirlscience.com/ (visit my website to see all my courses, shop merch, learn more about me, and donate to support the channel if you'd like!) Studying for an exam? Schedule Tutoring with me: https://GEOGIRLTutoring.as.me/ Hey there, Earth enthusiast! Check my favorite Earth-friendly products: Bamboo toilet paper: https://shrsl.com/3cvku Bamboo paper towels: https://shrsl.com/3cvkw Compostable tableware: https://shrsl.com/3cvkz Compostable trash bags: https://shrsl.com/3cvl0 Bamboo cutlery + straw! : https://shrsl.com/3cwfl Eco-Friendly Tote (great for grocery shopping!): https://shrsl.com/3cwfp Reusable straws + cleaning brushes (my fav!): https://shrsl.com/3cwft Eco-friendly laundry detergent: https://shrsl.com/3cwgo Directly offset your carbon footprint with Wren: https://shrsl.com/3d0t2 (Just click link, press get started, take the free C footprint quiz, then choose how much you want to reduce your footprint by donating to the C sequestration projects they're funding!) Non-textbook books I recommend: Oxygen by D. Canfield: https://amzn.to/3gffbCL Brief history of Earth by A. Knoll: https://amzn.to/3w3hC1I Life on young planet by A. Knoll: https://amzn.to/2RBMpny Some assembly required by N. Shubin: https://amzn.to/3w1Ezm2 Your inner fish by N. Shubin: https://amzn.to/3cpw3Wb Oxygen by N. Lane: https://amzn.to/3z4FgwZ Alien Oceans by K. Hand: https://amzn.to/3clMx1l Life's Engines: https://amzn.to/3w1Nhke Tools I use as a geologist/teacher/student: Geology field notebook: https://amzn.to/3lb6dJf Geology rock hammer: https://amzn.to/3DZw8MA Geological compass: https://amzn.to/3hfbdLu Geological hand lens: https://amzn.to/3jXysM5 Camera: https://amzn.to/3l6fGRT Carbon-neutral pencil bag: https://shrsl.com/3cvjv Carbon-neutral backpack: https://shrsl.com/3cvkc 0:00 Timeline & Summary 1:10 Cambrian Burrowers 2:01 3 Cambrian Life Intervals 3:39 Tommotian Fauna 4:44 Large Skeletonized Fauna 7:41 Soft Bodied Organisms 8:39 Huge Cambrian Predators 9:52 Cambrian Modes of Life 11:34 Cambrian Reefs 14:23 Evolutionary Experimentation 16:02 First Vertebrates 17:21 Burgess Shale 19:00 Ordovician Life 20:14 Convergent Evolution of Shells 21:14 Great Ordovician Biodiversification 22:52 Ordovician Reefs 24:09 Ordovician Predators 24:54 Ordovician Mass Extinction 25:47 Related Videos & References Disclaimer: Links included in this description might be affiliate links. If you purchase a product or service with the links that I provide I may receive a small commission, but there is no additional charge to you! Thank you for supporting my channel so I can continue to provide you with free content each week! And as always, let me know your topic suggestions in the comments down below!