Hellow guys, Welcome to my website, and you are watching Geologic Time & Dating Rocks Without Isotopes (Biostratigraphy & Lithostratigraphy) | GEO GIRL. and this vIdeo is uploaded by GEO GIRL at 2023-03-12T08:34:37-07:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.
| Name | Geologic Time & Dating Rocks Without Isotopes (Biostratigraphy & Lithostratigraphy) | GEO GIRL |
| Video Uploader | Video From GEO GIRL |
| Upload Date | This Video Uploaded At 12-03-2023 15:34:37 |
| Video Discription | In this video, we go over how the geologic timescale was originally built. The modern geologic time scale has numerical ages associated with each time period, but originally we used fossils to construct the timescale. The use of fossils to date and correlate rocks globally is called biostratigraphy. Biostratigraphy is still very relevent today because we cannot use radiometric dating on all rock types. For most sedimentary rocks, we have to use their fossil content to figure out their age. I talk about the general principles behind relative dating of rocks (dating rocks relative to one another rather than using radiometric techniques) and how biostratigraphy works, specifically the use and characteristics of index fossils, in this video. We then go over how we can correlate rocks using other metrics, like rock type (lithology) and magnetic signature. The use of lithology to correlate rocks is called lithostratigraphy, and the use of magnetic signature to correlate rocks is called magnetostratigraphy. We can now go over and check out stratigraphic correlations and ages using radiometric ages of the rocks to correlate them and make sure it matches what we determined without radiometric dating. This use of rock ages for correlation is called chronostratigraphy. All of these stratigraphic techniques help us piece together everything that has happened through earth's history and when it all happened. I give an example at the end of the video of how we can use stratigraphy to find periods of sea level rise and fall in the rock record (trangsessive and regressive sequences). Hope you enjoy! ;) 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, & donate to support the channel if you'd like!) 0:00 Video Outline 0:57 Geologic Timescale Overview 2:54 True Scale of Geologic Time 3:39 Absolute vs Relative Dating 4:53 Relative Dating Principles 7:54 Ordering Geologic Events (Practice) 10:35 How The Geologic Time Scale was Made 12:07 Extinction Events Define Period Boundaries 14:11 Stratigraphy & Correlation 15:19 Index Fossils for Biostratigraphy 17:40 Index Fossil Examples 19:24 Is Biostratigraphy Still Used? 21:16 Magnetostratigraphy 22:53 Lithostratigraphy 23:31 Strat Columns & Cross Sections 25:08 Transgressive & Regressive Sequences 26:47 Unconformities 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 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! |
| Category | Science & Technology |
| Tags | geology | geology crash course | earth science |
