Late Triassic Mass Extinction Causes & Consequences | GEO GIRL

The Late Triassic Mass Extinction Event was one of the 5 largest mass extinctions of the Phanerozoic Eon. It was caused by global warming and ocean anoxia as Pangea broke up causing major volcanism in the Central Atlantic Magmatic Pronvince. However, it wasn't all destruction, dinosaurs actually benefited from this extinction event becuase it cleared most of the terrestrial envrionments from other animals allowing dinosaurs to take over. Dinosaurs faired well through this extinction event because they were diverse, versatile, endothermic, and had feathers allowing them to adapt more easily to changing conditions, especially temperature changes.

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0:00 Late Triassic Mass Extinciton
0:52 What went Extinct / Declined
2:52 Land Plants & Animals Transformed
4:40 Volcanism Set It Off
6:34 CO2 Increase
8:28 Warming & Anoxia
10:05 Why Dinosaurs Did So Well
11:39 How Mammals & Croccodiles Survived
12:22 Funny Anecdote
13:06 Related Videos & References

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[myamazingjack]

Always shocked that your view count is not higher, although it seems to be picking up. Considering everything, I can't think of any science channel on youtube that surpasses you in quality, all things considered, i.e. your content and your presentation. I really enjoy watching/listening to your videos.

[nicholasmaude]

IIRC a major factor in the Dinosaurs becoming dominant at the end of the Triassic is that they had a more efficient respiratory system than mammals, mammal-like reptiles, amphibians and other archosaurs.

[ericodijk]

I thought that the way dinosaurs breathe also contributed to their success during the Late Triassic Maas Extinction. You can see their way of guiding air through their lungs in modern birds: one sack fills with air, which is then pumped into the lungs and exits into a second sack (avian respiration). So they do not need to breathe as mammals do (in and out to completely fill and empty a lung) or other reptiles.
Mammals evolved diaphragms which offer a different way of guiding air though a lung effectively. But as I understood, at the end of the Triassic, avian respiration, or the developing steps towards it, was their key.

[bencake]

Ohhh GEO GIRL dropped a video, I see... 😱 I directly let fallen everything down and watch it - now! 🥳

I really like in wich way you shown us all this fascinating game changers in Evolution. Mass extinctions. Step by step and always the eye of all the things whom work together. Love it! ❤️

The whole triassic is such a amazing time. Cause of many reasons. And now, we all see how this Epoch comes to a rude end. 😬

Thanks for your great and amazing Work. 🤗🦖

[takashitamagawa]

It is intriguing to think that feathers appeared so early in the evolutionary history of dinosaurs. By now most of the vertebrate paleontology community believes that birds evolved from dinosaurs, but feathers as a flight mechanism is then a repurposing of a feature that evolved for a different function (or functions).

[donaldbrizzolara]

The disappearance of the placodonts is interesting. Icthyosaurs and nothosaurs (evolving into plesiosaurs) continued on. Placodonts probably dwelled in shallow waters taking on a lifestyle akin to todays walrus (predators feeding on mollusks). Perhaps one of the causes for the extinction of the placodonts was actually loss of habitat.‭ ‬The placodonts seemed to have spread with the breakup of Pangaea as continental drift created new expanses of coastline and shallow sea.‭ ‬However the process that created the expanse of habitat was still on-going with the distances between the landmasses ever increasing.‭ ‬Possibly this would have reduced the amount of shallow sea habitat as well as isolating the placodonts to smaller geographical areas.‭ Also, as predators themselves their demise, in part, might be due to the Triassic extinction of critical prey sources. Nonetheless, it’s all very thought provoking. As per usual, Rachel, a wonderful summary of yet another fascinating dying.

[JasonKale]

I always learn something new!!! Thank you!!!

[georgefspicka]

Hi Geo Girl :)

I think I’ve mentioned that in addition to identifying fossils for the NHSM, I also do my best keep up with the research concerning extinction and climate events.
I recently read that the Mid Triassic, Carnian Pluvial Episode, is starting to be considered as a Major Mass Extinction event, and that this too gave dinosaurs an evolutionary boost.
In central Maryland, we have the LateTriassic Gettysburg and New Oxford Formations, which are part of the series of rift basins that comprise the Newark Supergroup, with exposures extending from Nova Scotia to North Carolina.
A number of theropod grallators have been identified.
At the NHSM we have a set of tracks that have tentatively been identified as belonging to a running Coleophysis.
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Something new to me, I just read about an End Ediacaran, Mass Extinction event. I’ll have to find out more about that.

[mikemiller]

You may be watching This for school, I’m watching it because I’m high and I liked dinosaurs…when worlds collide

[sussekind]

Another great video, girl! I've been slowly going through your archives, as I just discovered your channel a couple of weeks ago. I love your content!
Thanx, and keep up the good work.

[janicegipson]

Good chuckle at the end. For me, from very early in life, the meek shall inherit the earth meant cockroaches, lol. Surprised to see it in print!

[davidgrech]

Thank you for your awesome video and I will be looking forward to seeing more from you 🙏❤️

[meepsheep]

I just want to say Thank you very much, GeoGirl, me and my friends survived our final examination by binge-watching your videos. We love your videos, and I hope you will continue these educational videos, love ya from the Philippines here!!!

[armanddeperdussin]

Your channel is my go-to for geology and evolutionary biology. In your Late Triassic Mass Extinction video I offer one caution. Note this text from the video, "... dinosaurs had already developed insulating coats of feathers to access vegetation toward the poles." The word "to" could be interpreted to indicate the coats of feathers were developed for a specific purpose (accessing vegetation). Evolution has no sense of time or purpose. Those insulated dinosaurs were lucky to have this exaptation.

[ecurewitz]

CAMP is visible not far from where I live. It’s about an hour drive to the Mount. Holyoke and Mount Tom ranges in New England. Fault block ranges caused by the breakup of Pangea consist of the basalts that reached the surface at that time

[punditgi]

Watching Geo Girl always makes my day! 🎉😊

[martinkitt]

You and your channel are phenomenal. Love your videos.

[sayiansweet]

@Geo Girl. I have now seen all your extinction videos, and appreciate your well-constructed information provided along with your clear and concise reasoning. My question for you is "based off the geography of the Earth, how could the Earth go from a Unicellular organism to the Cambrian Explosion of complex multicellular diversity?" What was the cause and condition to transform to such an incredible state for life when the last Billion years had relatively no change? Thank you for any insight you can provide!

[aaronvogel]

What do you call a famous geologist??? A Rockstar!!!
I needed a laugh after the cockroach bit...

[pierrearmand]

I enjoy your videos but.... So when you show the crustal extension it would be nice to see what is happening below to cause the crustal extension (so you can understand what's at play). I am listening to the Rise and fall of the dinosaurs and when he talks about the breaking up of Pangea, he makes it sound more dramatic, so you get the sense that this volcanic event is or (tectonic event) is having a dramatic effect on the shape and life on the planet. I don't know if you have read that book (rise and fall of the Dinos), but it is a great book. When I took geology, back in the early 80s I did not get much of a sense of anything, I got the facts but not the a picture of what was going on. Not sure if it was me or the way things were presented. That is why it is great to have videos like this.