When it comes to mass extinctions, you probably imagine giant volcanic eruptions or asteroids raining fire from the sky, but sometimes these events can have some unexpected causes.
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Sources:
https://www.geosociety.org/gsatoday/archive/22/1/article/i1052-5173-22-1-4.htm
https://www.sciencedirect.com/science/article/pii/S0012825220302464
https://www.lyellcollection.org/doi/full/10.1144/SP423.10
https://bioone.org/journals/paleontological-research/volume-25/issue-4/2021PR004/Nonmarine-Mass-Extinctions/10.2517/2021PR004.short
https://www.lyellcollection.org/doi/full/10.1144/SP423.9
https://www.geosociety.org/documents/gsa/timescale/timescl.pdf
https://www.britannica.com/animal/placoderm
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1692181/
https://oceanservice.noaa.gov/facts/eutrophication.html
https://www.nature.com/articles/s41477-017-0097-2
https://www.eurekalert.org/news-releases/970795
Images:
https://www.gettyimages.com/detail/photo/volcanic-mountain-in-eruption-royalty-free-image/670551650?phrase=volcano&adppopup=true
https://www.gettyimages.com/detail/photo/fossil-fish-royalty-free-image/96672769?phrase=Devonian&adppopup=true
https://commons.wikimedia.org/wiki/File:Late_Devonian_palaeogeographic_map.jpg
https://www.gettyimages.com/detail/photo/trilobites-scavenging-on-the-seabottom-royalty-free-image/522735233?phrase=Devonian&adppopup=true
https://commons.wikimedia.org/wiki/File:Stromatoporoid_fossil_(Columbus_Limestone,_Middle_Devonian;_Ohio,_USA)_1_(27138607267).jpg
https://www.gettyimages.com/detail/photo/fossil-trilobite-imprinted-in-the-sediment-royalty-free-image/478272718?phrase=trilobite&adppopup=true
https://www.gettyimages.com/detail/photo/group-of-dunkleosteus-circling-royalty-free-image/531178207?phrase=Devonian&adppopup=true
https://commons.wikimedia.org/wiki/File:Devonianscene-green.jpg
https://commons.wikimedia.org/wiki/File:Zosterophyllum_sp._-_MUSE.jpg
https://www.gettyimages.com/detail/illustration/parts-of-plant-morphology-of-abstract-tree-royalty-free-illustration/1044769846?phrase=tree%20anatomy%20trunk%20roots&adppopup=true
https://commons.wikimedia.org/wiki/File:Seed_fern_frond.jpg
https://www.gettyimages.com/detail/photo/carboniferous-forest-royalty-free-image/468599236?phrase=devonian%20forest&adppopup=true
https://www.gettyimages.com/detail/video/slow-motion-surface-boiling-water-stock-footage/1344403983?phrase=flowing%20water&adppopup=true
https://www.gettyimages.com/detail/video/algal-bloom-polluted-water-green-color-in-lake-stock-footage/597926202?phrase=algae%20bloom&adppopup=true
https://www.gettyimages.com/detail/illustration/the-eutrophication-process-royalty-free-illustration/1364257858?phrase=eutrophication&adppopup=true
https://www.gettyimages.com/detail/illustration/lepidodendron-tree-royalty-free-illustration/1257383377?phrase=Lepidodendron&adppopup=true
https://www.gettyimages.com/detail/photo/sigillaria-tree-like-plant-fom-the-carboniferous-royalty-free-image/1157676356?phrase=Lepidodendron&adppopup=true
https://www.gettyimages.com/detail/photo/devonian-scaumenacia-fish-royalty-free-image/477323245?phrase=Devonian&adppopup=true
https://www.gettyimages.com/detail/photo/collision-of-an-asteroid-with-the-earth-royalty-free-image/537697098?phrase=asteroid%20impact&adppopup=true
https://www.gettyimages.com/detail/photo/devonian-lake-cycle-of-life-royalty-free-image/531127397?phrase=Devonian&adppopup=true
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