Spirals in Time: What Can Ammonites Teach Us About Life in Ancient Oceans?’ with James Witts
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- Опубликовано: 10 июл 2021
- Recorded Live at the 2021 Lyme Regis Fossil and Earth Science Festival. Ammonoid cephalopod molluscs (more commonly known as ‘ammonites’) are one of the most recognisable groups of fossils. Their distinctive spiral-shaped shells can be found in huge numbers in sedimentary rocks all over the world, including in the cliffs of the Jurassic Coast around Lyme Regis. But what do we really know about the animals that built these shells? What did they look like? Where did they live? What did they eat? And why did they disappear 66 million years ago? In this talk I will show how the latest scientific research is helping palaeontologists better understand these enigmatic extinct animals, and the lessons they can teach us about the effects of rapid environmental change in the distant past, and potentially the future.
Texas is in a major drought right now and people are gathering amonites like crazy. I enjoyed your information. Thank you.
Best comprehensive introduction to ammonites on RUclips. Wonderfully well-prepared. Thank you!
Thank you for this fantastic explanation, great job!
Great video - I appreciate the detail he went into
Fantastic presentation.
Fascinating... This is why I luv RUclips
Interestingly, the Nautiloids only live where Seals do not. Another curious factor is that Nautili are by far, the longest living of all all the molluscs, up to several decades while squids and Cuttlefishes don't live more then a couple of years.
Just incredible information blows my mind these fossils are millions of years old ..
fascinating!
"...bumping into things." A good reason to have a reinforced shell!
Great video
Just found two of them in one stone here in Kenya, Kwale County. Just crazy to imagine all that time having gone past, and then I get the chance to break a rock and boom, there they are... gonna find a nice spot for them at home...
I have never seen a starfish in my life I wish I could go to the aquarium 😊😊😊
Fascinating creatures 🦐🐠🐡
Wow I have a fossil of it I had no clue that a animal lived inside it 😮😮😮😮😮
Did they have nautilus tentacles, or did they were more squid-like?
Since when is it keff???
Do we dmsay kef-alization or sef-alization? Then i guess if you go back in the etymology to the greek Islands we recover the hard k. Bit you go against the grain of good sound sir
The theory about ammonites went extinct because they lived close to the surface is interesting but I know for a fact there are tons of other forms of sea life that lived on the floor of the ocean that are fossilized in Missouri limestone that went extinct. So I don't think your, live near the surface Extinction theory, is totally correct and is not valid. Plus the theory of one asteroid digging up enough sulfur from One impact to acidize the whole ocean of the whole Earth seems a little far-fetched. It is mathematically unlikely. If the sulfur was there in the ocean in the first place it would have already sulfurized and acidized the ocean before the meteorite ever hit anything.
That theory is probably right. And the Nautiloids that normally roam the sea floor survived with energy source provided by Earth's thermal vents that fed some life, even when photosynthesis shut down with years of dust clouds. It's fascinating field of science.
@@garydunken7934 let me repeat there are tons of sea life that are fossilized that you can look at, with your own eyes, that died and went extinct. And they did not go extinct because they lived near the surface. In fact they lived on the bottom of the ocean and they still went extinct. So you make up a totally new theory that ammonite and Nautilus swam down to the limited number of volcanic vents underwater and change their whole lifestyle of living to a lifestyle of living by a volcanic vent. .... Ridiculous. Why do you think photosynthesis shut down? You're making up another fairy tail.