Extraterrestrial impact in Yucatán, lava floods & Cretaceous-Tertiary extinction
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- Опубліковано 11 лют 2025
- Extraterrestrial impact in Yucatán, lava floods in India, and the great Cretaceous-Tertiary extinction: A New Autopsy Report on T. rex and Friends
Mark Richards, Executive Dean of Letters & Science, Dean of Mathematical & Physical Sciences, and Professor of Earth & Planetary Science, presents his latest research on the extraordinary events surrounding the disappearance of dinosaurs, first introduced at Berkeley as the famous ""Alvarez hypothesis."" This lecture was given at an event recognizing his administrative achievements as he resumes his scholarly pursuits as a professor and researcher.
The dinosaurs and about 70% of all species disappeared 66 million years ago. This apocalypse was probably caused by a meteor or comet impact that left a 200 km wide crater on the Yucatan Peninsula in Mexico. However, at about the same time, a torrent of lava was unleashed in western India in a series of volcanic eruptions known as the Deccan Traps. New evidence suggests that the largest of these may have been triggered by the Yucatan impact, with the resulting discharge of carbon dioxide and sulfate aerosols into the atmosphere perhaps contributing to the Cretaceous-Tertiary extinctions.
I have to tell something about this vid. By the way Im from the Philippines working as DisasterRisk Reduction Consultant.
Dr Mark made a great impact to me as a person and as professional. His thoughts created enlightenment to my work on understanding geological hazards. His thoughts transformed into Resilient Communities.
I hope that one day I will meet one of the most admired scientists of US.
Lecture begins at 8:40
Thank you
I'm an Astronomy student just finishing up my third year of uni, and meteorites have always been a special love of mine. This was a really informative lecture, and very educational! Thank you! :)
Very interesting. Thank you for uploading.
thanks this recent lecture bout kt extinction give me more information about this interesting topic that fascinate me for since i was kid. make more on this
The research of the Deccan Traps lava flows is informative. I realize that the intent is to link the Chicxulub impact with the lava flows in a cause-and-effect scenario. As the author of the Gravity Theory of Mass Extinction (GTME), I believe this research further supports my theory.
When the theory was originally proposed, several years ago, I theorized that surface gravity on Pangea’s separated continental masses increased significantly at the end of the Cretaceous period. I suggested that a way to verify this would be to examine the Deccan flows during this period because a significant change in surface gravity would affect the structure of the flows.
This video supports GTME; the early flows are thick (i.e., higher) but occupy a small surface area and the later ones, under the influence of higher surface gravity, spread out to cover a greater surface area.
Enviro Geologist,
Can you explain why flood basalt volcanism accompanies almost all mass extinctions as documented by Courtillot?
Can you explain why there were massive swings in sea level when Pangea existed and there were no polar ice caps?
Can you explain why some tetrapods reached enormous proportions (e.g., titanosurs) when Pangea existed?
Can you explain why sea levels dropped significantly and temporally with mass extinctions as documented by Hallam?
If you are a bona fide geologist and not a troll then answer at least one of the questions I posed.
I’m aware that glacioeustasy is not the only cause of sea level fluctuations. The rapid regressive-transgressive couplets accompany almost all mass extinctions. Anthony Hallam describes these in detail in ‘Phanerozoic Sea-Level Changes’ and he states that epeirogenic effects of ocean trench subsidence or the rise of mantle plumes are of negligible importance.
The Vail and Hallam sea level charts are widely accepted and illustrate the high sea levels and fluctuations during the Phanerozoic eon.
The hypothesis that effluents from flood basalt eruptions have caused mass extinctions has been challenged. The reason for this is that the rapid large and negative carbon isotope shift is much too large to be explained by the eruptions. The alternative, better in my opinion, is the disassociation of methane which degrades to carbon dioxide and is released from the sea floor where the hydrates form.There are two important questions:
1. What caused the release of the methane?2. Why has the magnitude of flood basalt eruptions gradually decreased since the breakup of Pangea to the present?
Both of the above can be explained by the GTME.
@@johnstojanowski8126 Why there was massive volcanism accompanying mass extinction? In case of KT boundary impact, the volcanism was triggered by the astroid impact. Plain and simple. Oh, the precision dating of rock says Deccan Traps predates the astroid impact? How precise is the dating by the way? How would you calibrate the measurement with known age of the rock? Stop bull s-ting, for a 68 million year old rocks, you cannot get such precise accuracy to begin with. Plus, this politician-easy going-people-person geologist is saying that we are in the largest mass extinction age? Would you, or any of your beloved species of animals be rather living now or right when the KT impactor was just landing on the earth? Twisting facts, lying through teeth is the typical of mainstream scientists these days.
Honestly the closeups of Alvarez going on and on about this guy gives me the creeps.
His hair looks so darn real, pure class 👨
At 2:52 dude is rockin that hat!
Remote viewing data per The Farsight Institute suggests there was extraterrestrial involvement with this event...not a simple big rock.
Fascinating!
Key point... I was trashing Walter's work for no scientific reason or basis but he was still generous enough to have weekly lunch with me. I am such an asshole.
9:15 Excellent dramatization of 65 million years vs. 4.5 billion years. Deep Time unfolding one day at a time.
36:00 This is What a Scientist Sounds Like. ;-)
Global Earthquakes, rattling/ liquefaction, etc. the matrix deep under the traps,... 'fracking' but different, makes a lot of sense.
I never could understand the Impact v. Deccan Traps other, it was all happening on the same small planet and the comet had to have made Earth vibrate like a bell. - a case of people getting lost within one's own mindscapes and forgetting to remain focused on the Physical Reality. Mark Richards does a wonderful job of explaining how science operates - along with providing the hard evidence that support and enlighten's that gut-feeling many already have.
Great discussion of an fascinating subject. I wish the camera operator would stay awake and show the graphics when they are referred to!
Massive astroid strike that must have had massive Tsunami of 1 mile high wave and black dust all around the sky for hundreds or even thousands of years blocking the sun, yet the reason Dinosaurs went extinct was this regular, predictable, and ongoing volcanic activity.... enough kool aid man...
@@sbkarajan The Deccan Traps formation was much more than "this regular, predictable, and ongoing volcanic activity"- Sorry the Geology does not fit your Narrative.
@@v8infinity8 How long did STUPID deccan traps last? 30,000 years? So the eruptions going on for that long are not predictable and regular for the dinosaurs living in that period which had lifespan of at most 100 years? Common sense please. Well, geology is so boring for a reason. Idiots run the show.
One of the best talks I've ever seen. Thumbs plus.
I’m curious as to what mechanism actually pushed the dinosaurs and most other life in the late Cretaceous over the edge to extinction after the impact, was it years of global darkness/ destruction of food chains? I guess many died off quickly as a result of the initial effects of the impact due to the explosion, tsunamis, acid rain, shockwave, fires, etc. But for those dinosaurs and animals far from the impact site, it must have been a slower more prolonged death. If the impact triggered more intense volcanism from the Deccan Traps, just as the world was experiencing a kind of nuclear winter, that’s intriguing, and it would seem likely that dinosaurs and animals far from the impact would have succumbed to death by starvation and cold due to prolonged darkness and cold. One wonders how long after the impact occurred did the last dinosaurs die? Tens of years? Hundreds of years? Thousands? I’d love to know the answer to that.
Permian-Triassic extinction event was also highly suspected to be a massive astroid hit, but this agenda driven "professor" must think it is still the on going all the time volcano that killed off 95% of all living species, not the astroid impact. How is he getting weekly lunch with Walter Alvarez and bragging about it is the real mystery to me.
The eruptions happened on a spot In the planet where the pressure wave could have been responsible. That force has to bounce through the earth and I swear huge volcanic events at the same time as an impact, where pressure waves would possibly create enormous earthquakes and led to the deccan traps.
I would be interested to know if any of the other extinctions have coincident bolide impacts that may have accelerated the volcanic activity. Seems particularly relevant in the case of the Permian event and the Siberian province which is magnitudes larger than the Deccan.....
The Siberian Traps are being studied much in connection with the Permian extinction, 252 million years ago. There is, not that I've heard, any evidence of any kind of extraterrestrial impact (meaning a meteor or comet crashing into earth) that might have had similar actions as the ones put forth in this case, which, itself is still a working hypothesis. But that doesn't mean one didn't happen. This was 4-5 times older than the extinction at the K-T boundary, 65 mya, +/-. so evidence of a crater that could be found to substantiate such an idea might be a lot harder if not impossible to locate, given the difference in the formation of land on the globe (this was in the period when we had one of 4 or 5 supercontinents, this one being Pangaea (I've seen it misspelled many times: "Pangea", though, I bet if you asked an expert in this field they'd probably tell you either spelling is "OK", but, I believe in sticking to the correct, original spelling, thank you very much!). It would be interesting to see how far the hypotheses for the Permian mass extinction gets over the next, say, 20 years.
Dr. Basu et. al found chondrites at a P/T boundary section at Graphite Hills, Antarctica. There is a paper in Science Nov. 21, 2003. It is worth noting, in this regard, the giant circular structure beneath the ice of Wilkesland, Antarctica. Gravity & magnetic anomalies make the structure a possible Earthly analog to the largest lunar impact basins.
My question would be whether eruptions at other hot spots coincide with K-T? There were maps of them but then the rest of the time is spent on India. If the impact global quake set off several, that would improve the quake theory and add to the likelihood of eruptions being contributory to mass extinction.
the other volcanic provinces have differing datings.....the larger ones match up with extinction events (ie Siberian Traps time to the Permian Extinction), but the smaller ones don't
I saw it man it was crazy got in my time machine and barely made it back
His “solution” is beyond obvious. You mean to tell me that no one realized this before?
This planet is a ball of fluid.
yes nothing solid at all
just a flimsy crust around a gel
Dinosaurs and meteor seems straight like a joke. As if it's a simulation or movie.
Excellent talk. However, what we really need to know is less what DID kill the dinosaurs, but what effect either a catastrophic volcanic eruption or a strike by a 6 mile comet would have if they happened again. The pertinent question is not, did the Deccan traps or the meteor strike or both kill the dinosaurs. The pertinent question is, COULD either of them alone have killed the dinosaurs? And, what would have been the effects of either alone, had the other not happened?
From what I can see, the meteor strike alone would have caused everything that took place if the Deccan traps had not happened, though the traps could have made things more nightmarish than they already were, far longer, for a world trying to recover. But, by that point, most life was already dead with little left to support it.
I might also point out, that if the main eruption of the Deccan traps was soon AFTER the comet strike, it would have done more to interfere with recovery than to cause the mass extinction.
@17:34 he knows he's lying.
BM, why do you say that? {Prof Richards said *"we are in the middle of perhaps what will be the greatest extinction Earth has ever experienced."*} Derision and insults are easy. Explaining yourself and providing support for your claim is the challenge. I notice you didn't even try. @BlueMax, have you ever actually looked at what scientists have been learning about our planet's life supporting biosphere this past half century and before??? 17:15 - extinction graph.
I wonder if you know what "Deep Time" is.
gotta secure that funding
Black Tuesday? The PRB referring a color of an oppressed group to a day of the week?
Good info! I hope the kids get some attention from a nanny or somebody because with parents like that, it would be shocking that they were emotionally cared for properly. I had two Dr. parents.
There’s good evidence that about 50% of crime can be attributed to single parent households, luckily these two are married and very professional, so the children should be OK, but they might not have been paid much attention to. We have a crazy notion in our society that being a mother or nurturing father and not going crazy with a mega career is a bad thing. No, we need dedicated parents, who perhaps work at most part time while the children are growing up maybe to age 16. Or a good nanny, maybe even a cook or something.
Less intro. More lecture. Get over yourselves.
Couldn’t agree more. I swear it’s so bad that it’s almost comical.
To even suggest the dinosaurs might be as or more intelligent than us - had they endured - is nothing short of idiocy.
Passed with flying color 40 years ago.
Hello .... Intelligence has nothing to do with uncontrollable disasters .........
that type of undifferentiated, reactionary thinking shows a serious lack of depth of insight, imagination as well as not much, if any, knowledge of the way evolution operates, which, for one, is over a LOOOONNG period of time. "Geologic" time, as they say. After the extinction of the dinosaurs, it became possible for mammals to begin a major evolutionary development that went on and on for another 60-63 ma, which is around the time the first humanoid ancestors have been dated to ("Lucy", just one example of a super-old set of remains, came from around a million years ago and it still took that much time to get humans to where they were finally distinguished as homo sapien sapiens, which came about some 50k yrs ago(? - >50k yrs?) - so, if given the chance, those beasts of the cretaceous era, if they hadn't gone extinct 65 mya, give or take 1000 or 2000 yrs, had 65 x as much time for evolving. Obviously, a giant predator like Tyrannosaurus Rex wouldn't have just kept on going that long, itself, but, who knows what sort of life might just have evolved in the absence of the ability of mammals to break out, so to speak? Just because it might not have been "humans" that would've been the product that came down to today's period, geologically, but that doesn't mean that through a long period of evolving: natural selection, sexual selection, variations, speciations that came about from multiple variations that kept on going for generations until, 20k years later would turn into a new species. Who really can know what would be the dominant life form on earth today if this mass extinction hadn't occurred? What if the even bigger extinction, the one at the end of the Permian age, 250 mya? It was that extinction which paved the way for dinosaurs, as most people today think of them. It takes a very open mind and a willingness to listen and even speculate on many possibilities, hypotheses, etc. Just writing "that's idiocy" is not at all a sign of a curious mind, eager to explore many avenues of possibility and to go where the science takes you and to NOT follow any dogma, be it scientific, religious or otherwise. Dogmas are the bane of progress in any area!!
just to correct your dates, current understanding is H. sapiens emerged in Africa 300,000 years ago; H. habilis the first type of human emerged just under 2 million years ago. Australopithecines and other upright apes like "Lucy" emerged about six million years ago.
Uh, have you ever heard of Nancy Pelosi?
Public speaking Is definitely not one of his strengths....
Neither has he scientific mind or reasoning. Why did he have to emphasize his good relationship with Walter Alvarez while discussing his topic? If he had something credible and convincing to discredit Alvarez's research, Alvarez should be shunning him and we'd understand. This guy got nothing.
@@sbkarajan My man, are a schizophrenic? No one gives a shit about "scientific mind" and stuff. People put forth they hypothesis, and their reasoning + evidence. It gets torn apart by others. Whichever theory can get the most consensus wins out until new information arrives.
@@sbkarajan Good take. However I’ve always thought Alvarez was a fraud and too quick to judgement which is commonplace in the scientific community.