Guest geology by David Middleton
The fake geologic epoch known as the “Anthropocene” just won’t die… It’s like a zombie from a bad science fiction movie.
NEWS FEATURE 06 AUGUST 2019
Humans versus Earth: the quest to define the Anthropocene
Researchers are hunting for nuclear debris, mercury pollution and other fingerprints of humanity that could designate a new geological epoch.
Crawford Lake is so small it takes just 10 minutes to stroll all the way around its shore. But beneath its surface, this pond in southern Ontario in Canada hides something special that is attracting attention from scientists around the globe. They are in search of a distinctive marker buried deep in the mud — a signal designating the moment when humans achieved such power that they started irreversibly transforming the planet. The mud layers in this lake could be ground zero for the Anthropocene — a potential new epoch of geological time.This lake is unusually deep for its size so its waters never fully mix, which leaves its bottom undisturbed by burrowing worms or currents. Layers of sediment accumulate like tree rings, creating an archive reaching back nearly 1,000 years.
[…]
Given how much people have done to the planet, there are many potential markers. “Scientifically, in terms of evidence, we’re spoiled for choice, but we have to pin it down,” says Jan Zalasiewicz, a palaeobiologist at the University of Leicester, UK, and chair of the AWG.
[…]
Once they pick their representative marker, researchers working with the AWG need to gather enough evidence from around the world to convince the governing bodies of geoscience that they have found a truly reliable signal for the start of the Anthropocene. But some scientists argue that human activity has been shaping the planet for thousands of years, and that the working group has settled too quickly on the 1950s for the start of the proposed epoch. Erle Ellis, a geographer at the University of Maryland, Baltimore County, and an AWG member, has criticized the committee’s plans for designating the start of the Anthropocene. “The AWG decided the timing of the boundary before deciding on the marker, not the other way around,” says Ellis.
Hard evidence
In the end, it will be the rocks that have the final say.[…]
After a decade of investigating this question, the AWG decided in May that humans had, in fact, left an indelible geological mark. In a binding vote in May, 29 of the 34 members opted to move forward with developing a proposal supporting the designation of the Anthropocene.
The AWG’s next task is to put forward a formal proposal identifying a global boundary stratotype section and point (GSSP), or ‘golden spike’…
[…]
In its recent vote, the AWG members decided overwhelmingly to pursue a GSSP in the mid-twentieth century.
[…]
A series of votes
Like the stratigraphic record that the researchers are studying, the decision to officially designate the Anthropocene is multilayered. The AWG aims to present a final proposal identifying a mid-twentieth-century GSSP to its parent body, the Quaternary Subcommission of the ICS, by 2021. If approved, the proposal will be voted on by the ICS and will then proceed to the executive committee of the International Union of Geological Sciences (IUGS) for final ratification. Only if it passes all these hurdles will the Anthropocene officially become a new unit of the International Chronostratigraphic Chart, more commonly known as the Geological Time Scale. So far, all 65 GSSPs that have been ratified are from marine environments, except for the one marking the start of the Holocene, which uses a Greenland ice core.The formal process has moved much more slowly than has popular culture, which has already embraced the Anthropocene and used the term on everything from record albums to magazine covers. But the AWG is clear that its mandate is to make decisions based on the stratigraphic record alone.
Not everyone is convinced it can do that yet. One sore point is that the working group made a decision on when to set the boundary, even though it had not yet settled on a golden spike in the stratigraphic record. “It is an imposition of ideas onto matter, shaping evidence to fit, but it should be the other way around,” says Matt Edgeworth, an archaeologist at the University of Leicester.
Edgeworth is a member of the AWG but voted against the decision to recognize the Anthropocene.
[…]
Nature
There’s no agenda here…
Despite being populated with activists like Naomi Oreskes, it has taken the AWG ten years to vote on what their conclusion will be and to start looking for evidence to support their conclusion… And the vote wasn’t unanimous.
Here’s where the Anthropocene dies…
The AWG aims to present a final proposal identifying a mid-twentieth-century GSSP to its parent body, the Quaternary Subcommission of the ICS, by 2021. If approved, the proposal will be voted on by the ICS and will then proceed to the executive committee of the International Union of Geological Sciences (IUGS) for final ratification. Only if it passes all these hurdles will the Anthropocene officially become a new unit of the International Chronostratigraphic Chart, more commonly known as the Geological Time Scale. So far, all 65 GSSPs that have been ratified are from marine environments, except for the one marking the start of the Holocene, which uses a Greenland ice core.
Nature
The geologic time scale is based on the stratigraphic record, generally found in “rocks”. The Holocene Epoch shouldn’t even be an epoch. It should be an interglacial stage within the Upper Pleistocene, rather than an epoch of equal stature to the Pleistocene. The Pleistocene-Holocene boundary, so clear in the NGRIP ice core, loses all of its uniqueness in Antarctic ice cores, which capture multiple Late Quaternary glacial-interglacial transitions.
Assuming the AWG is ever able to put forward a coherent proposal for an Anthropocene epoch starting in the mid-20th century, they face some high hurdles in getting it ratified.
In the end, it will be the rocks that have the final say.
Nature
There aren’t a lot of sedimentary rocks that are only 60-70 years old.
The recent subdivision of the Holocene was based on a formal recommendation from a Working Group and was approved by >60% votes of the Subcommission on Quaternary Stratigraphy and the ICS Bureau, followed by ratification by the IUGS Executive Committee.
This leads us to the reason that the Anthropocene will almost certainly never be recognized as a formal geologic time period…
The utility of the Anthropocene requires careful consideration by its various potential users. Its concept is fundamentally different from the chronostratigraphic units that are established by ICS in that the documentation and study of the human impact on the Earth system are based more on direct human observation than on a stratigraphic record. The drive to officially recognize the Anthropocene may, in fact, be political rather than scientific.
Finney & Edwards, 2016
Dr. Stanley Finney is the Secretary General of the International Union of Geological Sciences (IUGS), which would have to ratify any formal changes to the geologic time scale. Dr. Finney’s term as the elected president of the IUGS runs through 2020… I wonder if it’s a coincidence that the AWG plans to present their formal recommendation in 2021?
References
Finney, Stanley C. & Lucy E. Edwards. “The “Anthropocene” epoch: Scientific decision or political statement?” GSA Today, 2016; 26 (3): 4 DOI: 10.1130/GSATG270A.1
Walker, M. , Johnsen, S. , Rasmussen, S. O., Popp, T. , Steffensen, J. , Gibbard, P. , Hoek, W. , Lowe, J. , Andrews, J. , Björck, S. , Cwynar, L. C., Hughen, K. , Kershaw, P. , Kromer, B. , Litt, T. , Lowe, D. J., Nakagawa, T. , Newnham, R. and Schwander, J. (2009), “Formal definition and dating of the GSSP (Global Stratotype Section and Point) for the base of the Holocene using the Greenland NGRIP ice core, and selected auxiliary records”. J. Quaternary Sci., 24: 3-17. doi:10.1002/jqs.1227
What’s more fake than an Anthropocene Epoch?
An Anthropocene Era.
The Anthropocene Era really would have been truly fabulous… for its brevity.
- Paleozoic Era: 541 to 252 million years ago, 289 million years.
- Mesozoic Era: 252 to 66 million years ago, 186 million years.
- Cenozoic Era: 66 million to 73 years ago, 65.999927 million years.
- Anthropocene Era: 1945-2018, 0.000073 million years.
I really couldn’t make this sort of schist up if I was trying.
Why did the Zombie eat the archer? He wanted his bone and marrow.
Do you have a bottomless quiver of cheap jokes? If so, I want one too… LOL!
Just the thought of it makes me quiver!
Don’t get shafted.
Shoulda been ‘…bottomless quiver of barbed jokes….’
Some time ago someone posted “A Nurses Guide to the Apocalypse”. It covered Zombies but I can’t the link. 8-(
It covered zombies.
How about the idiogendocene defined as the era where the scientific method gave way to idiots pushing agendas.
idiogendocene gets my vote
We can call it the Method Social Scientific. It differs from the Scientific Method in that you reach an unassailable socialist conclusion and then manufacture all the evidence you need to promote it. It comes complete with its own Inter-governmental Panel assigned and housed in the UN building.
Then you regale all those who contribute to the supposition and derail all who question it with the complete support of the Primary Media outlets acting as the Publicity Department for the Newscience.
Except the ICS and IUGS aren’t governmental anythings. The purpose of the ICS is to standardize stratigraphic nomenclature. Before an Anthropocene Epoch or any other level of geologic time can be adopted, the Anthropocene Working Group (AWG) has to put forward a coherent geological proposal with a Global Stratotype Section and Point (GSSP). The Sub-commission on Quaternary Stratigraphy, the ICS and IUGS would all have to ratify this by >60% votes.
The AWG was established in 2009 and has yet to put forward a coherent recommendation. It is unlikely that they ever will and even if they did, it’s unlikely to be ratified at any level.
Oh now you want to be serious?
You do understand that this whole thing is laughable fodder for the Misinformation Mafia in the mainstream media. You know aka the Propaganda Ministry. They have a separate Department for CAGW Publicity.
The AWGs and the ICSs and JUGs and IUDs areall bureaucrats with buttons at conferences on per diem (another word for other peoples money). This is all one great big joke played by officious idiots looking for funding. A make work project to pull wool over taxpayers eyes.
It’s actually an essential part of geology. It would be difficult, if not impossible, to do my job if there was no standardization of geological nomenclature.
The trouble is that this sort of fake and fictitious idea like the ‘Anthropocene’ Era is very easy to make up, just like a pocket pulp novel and once it gets into people’s imagination, it becomes a meme, or lives like a zombie or a new King Kong from a bad science fiction movie.
That is because the Propaganda Press breathes life into this nonsense and if it goes into arrest they hit it with shock paddles. CLEAR!
A better name would be the Halfassic.
Naomi Oreskes is a Professor of the History of Science. Kind of scary.
“He who controls the past, controls the future; and he who controls the present, controls the past.” George Orwell, 1984.
Have you seen what she looks like?
“Have you seen what she looks like?”
Are you that shallow?
See, you immediately assumed the poster meant, “she looks like a muskellunge and is therefore not to be taken seriously,” and got your back up. What if it had been this picture?
You might think, as I did, that he meant, “here is a person consumed with contempt for humanity.” Not shallow at all!
“See, you immediately assumed the poster meant, “she looks like a muskellunge and is therefore not to be taken seriously,” and got your back up.”
No, I’ve seen it on every thread where she is mentioned. Those few people will immediately start attacking based on her physical appearance. Other comments are proving my point. What does it matter how she looks?
She looks tired. She needs to take a rest.
She used to look like this in 2015:
Since then she has improved:
But her roots are the same.
https://media2.picsearch.com/is?l-Xe9LO1M7dacXzNqJ_ZJ23GFKfJVHWHEPjZV2-vSJo&height=255
scary isnt it?
one of her books is in our opshop
looks unread…which is a good thing
Im going to buy it to burn
after all its as thick as she is
and its 3c here tonight and prob rest of the week
I figure Im doing a civic duty and saving impressionable minds by removing it from circulation.
and No Im not a book hating illiterati at all
the moauntains fo them at home etc
but hers
and a couple of the Gai fantasies by whats his face ? attenborough
deserve the F451 sendoff.
Burn the books you don’t agree with. What could go wrong there?
What could and did go wrong is that this thread attracted you, Jeff. Gainsaying ≠ an argument. Take a hike, troll.
I call dibs on which books to burn.
Don’t see any difference between this and removing “Protocols of the Elders of Zion” or “The Anarchist’s Cookbook.” Naturally your mention of burning rather than e.g. using the books for bumwad caught the attention of tiny-brained pond life; don’t let it bother you. The petrol is on me, PayPal is fine.
The Ajustocene is obviously snark, but the Athropocene is purely Political Correctness. After the infamous old political joke–I know this is factually correct, Comrade, but is it Politically Correct?
Well, I took that for granite.
I’m surprised. The usual SJW modus operandi would be to try to get Dr. Finney fired and to get his pension revoked and trump up some charges to get him thrown in jail. Why the kid gloves?
F. J. Petitioning…”the rocks are the final arbiter”.
The Anthropocene nonsense is case of let’s call the post 1945 period something that fits with our doomist view of life then go out and try and find things that prove it exists.
It’s impossible to distinguish the “Anthropocene” geologically.
The Holocene [the last 11,650 years and “now”] is difficult enough.
It’s really just an interglacial…https://en.wikipedia.org/wiki/Holocene
An interglacial that includes a period warmer then now..https://en.wikipedia.org/wiki/Holocene_climatic_optimum
Interestingly another name that has been used for the Holocene is Anthropogene….pretty much the same as Anthropocene.
“Paleontologists have defined no faunal stages for Holocene. If subdivision is necessary, periods of human technological development such as Paleolithic, Mesolithic and Neolithic are usually used.”
Maybe perhaps, in a million years archeologists and geologists [of some species] working along ancient road networks might be able to define marker beds…bottles being replaced by cans, steel cans replaced by aluminium cans, the appearance of cassette tapes and rapid disappearace [that was a species that rose to prominence and quickly went extinct], the appearance of McDonalds packaging, the appearance of coffee cups and so on.
GregK let’s don’t forget our pre-Columbian Indian friends who left kitchen middens all along the Pacific Coast. Judging from the charcoal and shells they ate pretty well, and these kitchen middens are easy to identify.
” … let’s call the post 1945 period something that fits with our doomist view of life then go out and try and find things that prove it exists. ”
Isn’t this the charter of the IPCC as it fabricates science in support the UNFCCC?
While not called ages or stages, in July 2018 the International Union of Geological Sciences split the Holocene epoch into three distinct subsections proposed by the International Commission on Stratigraphy: Greenlandian (11,700 to 8326 years ago), Northgrippian (8326 to 4200 years ago) and Meghalayan (4200 years ago to the present).
The boundary stratotype (GSSP) of the Meghalayan is a speleothem in Krem Mawmluh Cave, India. The global auxiliary stratotype is an ice core from Mount Logan, Canada.
Real geological ages or stages can last millions of years within even longer epochs. For instance, the Late Cretaceous Epoch contains the six ages, the last two of which cover 11.5 (Campanian) and 6.1 (Maastrichtian) million years.
The Maastrichtian boasted the formidable, familiar T. rex and Triceratops, while the Campanian got by with their tyrannosaur and ceratopsian ancestors and kin.
They refer to them as “ages”…
http://www.stratigraphy.org/ICSchart/ChronostratChart2019-05.jpg
The proposed Anthropocene is supposed to be when humans started making major permanent changes to the earth? What about early man, oops sorry, I mean early person hunting North American megafauna to extinction about ten thousand years ago?
Yep… The Holocene is the Anthropocene.
David Middleton says:
“The Holocene Epoch shouldn’t even be an epoch. It should be an interglacial stage within the Upper Pleistocene, rather than an epoch of equal stature to the Pleistocene.”
I agree. We are still in the Pleistocene. There is nothing unique about the current interglacial period as compared to the last several, with the possible exception of one or two dozen large mammal extinctions that occurred around the time of the Younger Dryas. It is quite likely that another glacial period will begin possibly as early as a few thousand years from now or sooner. Will the next glacial period in our current Ice Age be given a new Epoch designation? And also the subsequent interglacial period? Doesn’t make good sense to me.
What is the Anthropocene *for*? What *geological* problem does defining it address?
None… Hence Dr. Finney’s paper.
I like Plasticene better than Anthro whatever, but we don’t need a new name until the layer of human bones is thick enough to show up. Like in the walls of the Grand Canyon
A layer of bones and plastic will be the future unconformity of The Anthropocene, hardly an Era.
This should be a perfect opportunity to point out the dangerously low levels of CO2 in the Anthropogenic samples. 410 PPM….and compare it to the vastly higher saturations in previous epochs and eras of 8,000 PPM and more in the Cambrian and show it dying away to the almost record low that it is today.
I see this as an opportunity and I cant believe how stupid these people are who are pushing this swill, make them pay for their stupidity.
I suggest you print out and laminate this particular graph and leave it in the car for shock value when you meet a warmist fool shooting his mouth off at a party etc. I put the Antarctic ice core sample on the other side making sure it is obvious that heating precedes a rise in CO2 always…and that is enough to stir dissent and wake a few people up I can assure you, no normal decent ordinary folk know about this…so as I say, I find this an excellent opportunity.
https://qph.fs.quoracdn.net/main-qimg-291ab5ba663d458dc0b36e8199b58208
Less than 180 ppmv CO2 is dangerously low for C3 plants
400+ ppmv is a little above the Neogene/Quaternary Periods (last 25 million years) average.
Comparisons with the Mesozoic and Paleozoic Eras aren’t particularly useful.
Anthropocene is a crock like so much of the other “cutting” edge research we see today.
It seems so many fudge factors are needed for much of what passes for research these days I just have one question, exactly what are they trying to cover up?
Totally agree that: “The Holocene Epoch shouldn’t even be an epoch. It should be an interglacial stage within the Upper Pleistocene, rather than an epoch of equal stature to the Pleistocene.”
The end of the so-called Holocene is a different matter.
“it will be the rocks that have the final say”
And the rocks will reveal a far thicker and far more distinctive layer than the K–Pg boundary which averages only 2-3mm thick. (http://spiral.ic.ac.uk/retrieve/9556/license.txt)
Yes, thats when an asteroid killed off 75% of species.
Forget about the Holocene, say good bye to the Cenozoic.
A “boundary layer” can’t be thick… It’s a boundary.
A transition zone can be thick… But it’s not distinctive.
The Eocene-Oligocene boundary exhibits, by far, the sharpest climatic transition of the Cenozoic Era…
The GSSP is the line between the O and the E…
http://www.stratigraphy.org/GSSP/Rupelian.html
The base of the “0.5m thick greenish-grey marl bed” is the boundary… not the marl bed itself.
This why the Paleogene Period should really have only two ages or stages.
The Cenozoic Icehouse begins at the Eocene/Oligocene boundary, hence so should the Neogene Period.
Yep. While the Oligocene-Miocene boundary is fairly sharp, the most significant shift was from the Eocene to the Oligocene.
It’s more likely the Anthropocene will be a significant unconformity, a layer of plastic and metal rapidly buried by the devastating future sea level rise.
There is no suggestion of rapid sea level rise.
In the past century, sea level has continued to rise at the same pace as since the depths of the Little Ice Age, during the Maunder Minimum of the late 17th century.
Renee is referring to the distant future.
Since we’re still in the Cenozoic and Neogene Ice Age, sea level is liable to fall again in future. In the longer term, the oceans will evaporate.
But in any case, lots of cities are far from the coasts. Even during the Cretaceous high stand, when the Great Plains were under water, there was still dry land.
Actually the devasting rapid sea level rise comment was (sarc). Typically surfaces on exposed dry land eventually tend to become unconformities or thin hard ground veneer surfaces.
Getting washed away in a 2012-style Earth-Crust displacement flood sounds so much cooler than just becoming the “Anthropocene unconformity.” LOL!
In the Anthropocene the terrestrial stratigraphic layer will consist of metal and batteries (cell phones, solar panels, electric cars, wind mills, concrete) instead of woody land organic layers (trees, grasses, mud).
All bonded together by styrofoam… 😆
“All bonded together by styrofoam…”
We had a chance at making the McDonaldocene but we blew it when we switched to cardboard packaging.
What makes it a boundary is the fact that there are substantial differences between flora and fauna above the boundary compared to below it.
The thickness of the boundary layer only matters to those who aren’t smart enough to concentrate on the real issues.
A boundary layer is thin… It’s a boundary. It’s usually an unconformity or other non-conformable surface. It represents a sharp geological change. Transition zones can be thick. They represent gradual geological changes.
Welcome to the Anthropocene…blink and you’ll miss it
Since we are dealing with lake sediments, it will likely be determined that the Anthropocene can be subdivided into the Steelcanian, followed by the Soft-topian, the Pull-tabian, and, currently, the Poptopian.
Way back in college, I thought that future paleontologists would put pull-tabs together, thinking they were like crinoid stems… 😉
David,
I remember a cartoon from college days showing some alien looking creatures recording a description of a “radioactive, beer can conglomerate.”
Professional people in earth sciences use the geological features of these time divisions for various purposes, such as assigning a bracket of ages and seeking similarity to other places.
To do this, the properties that help deduce the age have to be reasonably easy to identfy, not so fleeting or vague or rare that one needs special apparatus.
Those proposing “Anthropocene” fail this common sense test and are exposed to the same levity as those proposing the equally invalid “Adjustocene”.
Geoff S
“it will be the rocks that have the final say”
Yeah, maybe in another 50 million years or so from now.
‘There’s no agenda here… ‘.
Indeed.
“The AWG decided the timing of the boundary before deciding on the marker, not the other way around”.
Ain’t that the way, assemble a group of like-minded colleagues, agree on the conclusion, then look for supporting evidence and declare ‘the science is settled’.
I think the Anthropocene Working Group might be the Subcommission on Quaternary Stratigraphy’s version of the Golgafrinchan Ark Fleet Ship B.
There is evidence-based decision making and decision-based evidence making…
You’ve described the current state of the academic Humanities and Sociology, Chris. Assume, cherry-pick, validate.
It’s a systematic and conscious violation of the tenure agreement, and of the political neutrality of public money. And college administrators are serene.
Re extinction of American megafauna above – according to Matt Ridley humankind profited from specialisation – men hunted, women gathered, whatever the weather there was always something to eat. So to say extinction was caused by men is correct – by ‘personhunters’ incorrect.
Lions also specialize. Lionesses hunt, while lions just chase them off their prey, or do the same with hyena kills. Why work hard, when you can just bully and scare smaller creatures for your dinner? Better even if you and your brother team up to beat up on other predtors and take over a pride of lionesses, killing their current cubs, of course.
The downside for lions is that their time atop the heap is limited.
JT
You said, “… their time atop the heap is limited.” That is because another job they perform is to defend the pride from other predators that the lionesses are not capable of. It often results in high personal cost to the males.
If the ”Anthropocene” must have a geologically/stratigraphically discernible GSSP with a reasonably wide application I submit that the only viable one would be the expansion of Homo sapiens outside Africa. This is usually discernible biostratigraphically through the rapid extinction of large animals (including all other hominids), abrupt changes in fire frequency/vegetation and occurrence of characteristic stone tools.
Unfortunately it is somewhat time-transgressive, from c. 50,000 BP in the Middle East to c. <1,000 BP in much of the Pacific. However this is probably just as true for nearly all stratigraphic boundaries (except the K/Pg one, thanks to Chicxulub).
tty, there is an interesting stratigraphic boundary evident at many locations at the start of the Younger Dryas cold spell. Some say it has similarities to the K/Pg boundary, though not near as extreme of an extinction event.
It’s not even remotely close to the K-Pg boundary. K-Pg not only separates two periods (Cretaceous and Paleogene), it separates two eras (Mesozoic and Cenozoic). Younger Dryas is a stadial episode, within a glacial stage, within the Upper Stage of the Pleistocene Epoch. It has virtually no chrono-stratigraphic significance. Younger Dryas isn’t even clearly global.
David,
Here’s a recent example of what “some say” about the Younger Dryas boundary:
https://www.nature.com/articles/s41598-018-38089-y
I love geology, but I’m not a trained geologist, so I could easily be missing some important aspects. But the topic is at least controversial, even among trained geologists.
Scattered evidence of an impact event doesn’t constitute chrono-stratigraphic significance.
Younger Dryas, was just the final glacial stadial of the last glacial stage of the Pleistocene… One of many Dansgaard-Oeschger events.
The truly anomalous feature was the Bølling-Allerød interstadial.
Antarctica’s version of Younger Dryas, the Antarctic Cold Reversal, coincided with the Bølling-Allerød interstadial.
If an impact event caused the Younger Dryas cooling, it caused Antarctica to cool about 2,000 years before it hit the Earth.
While the Younger Dryas has climatological significance,it’s onset has no chrono-stratigraphic significance and its termination is only significant because it coincides with the end of the Pleistocene Epoch.
The K-Pg boundary separates not just two epochs, but also separates two periods and two eras.
David, thanks for the graphs. I’ve seen the first two and the third is consistent with the discussion in the paper that I linked. What you have not addressed are Sections 3 and 4 in that paper regarding spherules and platinum. It’s an interesting article regardless of interpretations.
It is interesting… It’s just about a billion orders of magnitude below the K-Pg boundary.
Bryan,
There is no valid evidence whatsoever for a YD impact and all the real evidence in the world against it.
The same usual suspects and their strap hangers somehow keep getting published, no matter how many times their laughable, repeatedly falsified assertions have been shown false.
“The K-Pg boundary…”
Gee, it guess it’s made the transistion.
I don’t know if you are stupid, being intentionally obtuse or just a troll… A “boundary layer” can’t be thick… It’s a boundary.
A transition zone can be thick… But it’s not distinctive.
The Eocene-Oligocene boundary exhibits, by far, the sharpest climatic transition of the Cenozoic Era…
The GSSP is the line between the O and the E…
http://www.stratigraphy.org/GSSP/Rupelian.html
The base of the “0.5m thick greenish-grey marl bed” is the boundary… not the marl bed itself.
What’s happened over the past 50-100 years has no more geological significance than the Medieval Warm Period, far less significance than the Little Ice Age, far, far less significance than the Dansgaard-Oeschger events, a few orders of magnitude less significance than the Holocene Transgression and about a billion orders of magnitude less geological significance than the K-Pg boundary. “Billion orders of magnitude” is hyperbole because there’s no actual way to meaningfully quantify it.
“Younger Dryas, was just the final glacial stadial of the last glacial stage of the Pleistocene… ”
“Scattered evidence of an impact event doesn’t constitute chrono-stratigraphic significance.”
If the Younger Dryas is nothing burger, the much less significant MWP and the LIA are what? Sesame seeds on a nothing burger?
Instead of lying about what I posted, quote me in context.
I call it a boundary: “the K–Pg boundary which averages only 2-3mm thick”.
You correct me: “A “boundary layer” can’t be thick… It’s a boundary.”
Then use the same phrase yourself: “not even remotely close to the K-Pg boundary”
With mockery, arrogance and churlishness thrown in for good measure. Go and have a nap.
Good fracking grief… The Younger-Dryas is not “not even remotely close to the K-Pg boundary” in it’s chrono-stratigraphic significance… Not thickness.
This is the idiotic comment that started this discussion:
This was in English…
The K-Pg boundary layer is very thin and it marks dramatic geological changes. It and the Permian-Triassic boundary, are by far the most significant chrono-stratigraphic features of the Phanerozoic Eon The fossil assemblages above the boundary are totally different than those below the boundary. The boundary between the Bølling-Allerød and Younger Dryas has climatological significance, but no chrono-stratigraphic significance. The boundary between the Younger Dryas and the Holocene has some chrono-stratigraphic significance, because it marks the boundary between two epochs… but its chrono-stratigraphic significance is not even remotely close to that of the K-Pg boundary.
The Medieval Warm Period, Little Ice Age and “Anthropocene” have no chrono-stratigraphic significance at all… They generally aren’t even in the rocks yet. When they do make it into the rocks, they won’t be thick or particularly significant layers in the future sedimentary record.
The end of the Younger Dryas is a quite sharp and well defined climatic shift that is the GSSP for the Holocene (the current interglacial):
http://www.stratigraphy.org/GSSP/Holocene.pdf
It is not well defined in Antarctica (except indirectly), but otherwise it is fairly global. Temperatures changed something like 5 degrees in 50 years. Now that is global warming!
It’s not distinctive relative to the other Dansgaard-Oeschger and Heinrich events. The real anomaly was the Bølling-Allerød interstadial.
Just another reason why the Holocene doesn’t merit epoch status. That supposed GSSP is unlike all the others.
Nor was the YD even the last cold snap during the glacial-interglacial transition. That would be the 8.2 Ka event.
There is nothing mysterious about the YD requiring highly improbable special pleading. It was a garden variety cold snap, akin to the other Dryases and similar fluctuations in prior glacial terminations.
As David notes, what is more unusual is the warmth of the preceding hot snap. The extent to which the YD was deeper than the previous Dryases can be explained by the larger than average quantity of fresh meltwater pulse injected into the oceans during the warm spell.
The academicene is easily defined – it starts at the PC boundary.
Although perhaps academic-ob-cene might be more appropriate.
They only have 12 years to make up their minds. Better get a wiggle on.