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Evidence record

Are we in a new epoch?

Every sentence on the exploration belongs to at least one claim below. Each says what kind of statement it is, what it rests on, what the evidence does not establish, and how far it was checked. Nothing here is a score, and none of it is a verdict on a belief or a theory.

Last checked 24 September 2026.

  • Source checked: 29
  • A judgement, not a fact: 6

If something here is wrong, misquoted, out of date or unfair, write to support@unknownoceans.com and give the claim number, which does not change.

What the question takes for granted

A question about classification rather than about the planet. Nobody on either side disputes that people have left a global mark in sediment; the question is whether that mark should be a formal unit of the geological timescale, and the body that decides answered no in 2024.

  • Geological time is divided into formal units whose boundaries are defined in rock

    Established

    The Phanerozoic units, including the Holocene, are defined by a reference point in a stratal section. Some boundaries are instead fixed by a numerical age, which the 2016 review names as the other method.

  • Human activity has left a global signal in sediments and ice

    Established

    Assembled in the 2016 review and not disputed by the body that rejected the epoch, which credited the working group with the data.

  • A formal epoch is the right way to recognise that signal

    Contested

    The working group argued for an epoch beginning around 1950; the authors of the event proposal, and the voters who rejected the epoch, did not accept it. The working group still holds its view.

How the question is labelled

Claim: A line in the mud

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: Anthropocene

Kind
Framing. Signposting. It asserts nothing a source could check.

The question

Claim: The signal in the sediment is real and global.

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    The Anthropocene is functionally and stratigraphically distinct from the Holoceneabstract

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Earth and its record · Review of the field

    The source reads: Manufactured materials in sediments, including aluminum, plastics and concrete, coincide with global spikes in fallout radionuclides and fossil-fuel combustion particulates.

What this does not establish

Global means found worldwide, not identical everywhere: the review says several of these signals are diachronous at a decadal scale.

Later work looked for

Crossref, 2017 on, "Anthropocene stratigraphic markers Crawford Lake GSSP": the working group’s 2024 proposal lists the same families of marker (plutonium fallout, fly ash and black carbon, new materials, carbon and nitrogen isotope shifts, species introductions); nothing found that withdraws them.

Claim 3 · checked 24 September 2026 · AI-assisted audit

Claim: Whether it earns a line on the geological timescale is a different question, and it was answered no.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

Claim 4 · checked 24 September 2026 · AI-assisted audit

Claim: Human activity has left a distinct and worldwide layer in sediments and ice

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

What this does not establish

“Layer” is a figure: the signals are markers within ordinary sediment and ice, not a separate deposit.

Later work looked for

Crossref, 2017 on, "Anthropocene stratigraphic markers Crawford Lake GSSP": the working group’s 2024 proposal lists the same families of marker (plutonium fallout, fly ash and black carbon, new materials, carbon and nitrogen isotope shifts, species introductions); nothing found that withdraws them.

Claim 5 · checked 24 September 2026 · AI-assisted audit

Claim: and the case that it is stratigraphically distinguishable from the Holocene has been made in detail

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.

The case is the working group’s, made by its members.

Claim 6 · checked 24 September 2026 · AI-assisted audit

Claim: A formal proposal to define an Anthropocene epoch was rejected in 2024

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

Corrected

24 September 2026. Previously: “A formal proposal to define an Anthropocene epoch was not ratified” The proposal was voted down by the Subcommission on Quaternary Stratigraphy and never reached the ratification stage (IUGS statement, 20 March 2024).

Claim 7 · checked 24 September 2026 · AI-assisted audit

Claim: and the timescale still ends with the Holocene

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    International Chronostratigraphic Chartv2026/06, Quaternary column

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: Quaternary Holocene Pleistocene

    The Holocene is the uppermost series, with the Meghalayan its latest stage; the word Anthropocene does not appear on the chart.

Later work looked for

Crossref, 2024 on, "Anthropocene vote Subcommission Quaternary Stratigraphy rejected" and "Anthropocene event epoch response": commentary and replies on both sides (Chakraborty 2024 for the epoch; Rull 2026 on the rejection), and nothing that reverses the vote; the chart read is v2026/06.

Claim 8 · checked 24 September 2026 · AI-assisted audit

Claim: Geological time is divided by evidence in rock: a boundary needs a signal that can be found worldwide and a physical place where it is defined.

Kind
What the field holds. The settled view of a field, as a review, a consensus statement or a reference work gives it. Not one study.
Review
Source checked. The cited passage was read, and it says this.

What this does not establish

Not every boundary is set this way: the review names a calendar age (GSSA) as the alternative to a point in rock.

Later work looked for

How the method works; not a finding later work revises.

Claim 9 · checked 24 September 2026 · AI-assisted audit

Claim: The argument about the Anthropocene is not about whether people have changed the planet.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

Follows from the objections the IUGS summarised (claim 33), none of which denies the human signal.

Claim 10 · checked 24 September 2026 · AI-assisted audit

Claim: It is about whether that change belongs on the chart, and what a chart is for.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

The page’s reading of the dispute; the working group itself framed formalisation as a separate question from the evidence.

Claim 11 · checked 24 September 2026 · AI-assisted audit

What is in the sediment

Claim: What is in the sediment

Kind
Framing. Signposting. It asserts nothing a source could check.

The signal exists

Claim: The signal exists

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

Later work looked for

Crossref, 2017 on, "Anthropocene stratigraphic markers Crawford Lake GSSP": the working group’s 2024 proposal lists the same families of marker (plutonium fallout, fly ash and black carbon, new materials, carbon and nitrogen isotope shifts, species introductions); nothing found that withdraws them.

Claim 13 · checked 24 September 2026 · AI-assisted audit

Claim: A 2016 review assembled the evidence: radioactive fallout from atmospheric nuclear testing, fly ash from fossil fuel burning, concrete and plastics as novel materials, sharply altered nitrogen and phosphorus cycles, and changes in the distribution of species.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    The Anthropocene is functionally and stratigraphically distinct from the Holoceneabstract

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Earth and its record · Review of the field

    The source reads: Manufactured materials in sediments, including aluminum, plastics and concrete, coincide with global spikes in fallout radionuclides and fossil-fuel combustion particulates. Carbon, nitrogen and phosphorus cycles have been significantly modified over the last century. ... Biotic changes include species invasions worldwide and accelerating extinctions.

What this does not establish

A review by members of the working group that proposed the epoch. The list is theirs; it is not an independent survey.

Claim 14 · checked 24 September 2026 · AI-assisted audit

Claim: Several of these are sharp, global and appear in ice cores and lake sediments at nearly the same moment in the mid-twentieth century

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    The Anthropocene is functionally and stratigraphically distinct from the HoloceneFig. 1 caption; New anthropogenic materials; Changed geochemical signatures

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Earth and its record · Review of the field

    The source reads: indicate consistent change during the mid-20th century exceeding Holocene ranges ... SCPs, first recorded in various sites in the UK ... synchronous global increase around 1950 C.E. ... the main phase of increase in nitrate levels was 1950

What this does not establish

Near, not exact: the review notes the radiocarbon bomb peak differs between hemispheres and that other signals are diachronous at a decadal scale.

Later work looked for

Crossref, 2017 on, "Anthropocene stratigraphic markers Crawford Lake GSSP": the working group’s 2024 proposal lists the same families of marker (plutonium fallout, fly ash and black carbon, new materials, carbon and nitrogen isotope shifts, species introductions); nothing found that withdraws them.

Claim 15 · checked 24 September 2026 · AI-assisted audit

Claim: which is the kind of marker stratigraphy uses

Kind
What the field holds. The settled view of a field, as a review, a consensus statement or a reference work gives it. Not one study.
Review
Source checked. The cited passage was read, and it says this.

Later work looked for

How the method works; not a finding later work revises.

Claim 16 · checked 24 September 2026 · AI-assisted audit

Claim: The review concluded that the interval is functionally and stratigraphically distinct from the Holocene.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.

Claim 17 · checked 24 September 2026 · AI-assisted audit

Claim: Markers in the sediment

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: Plutonium and other fallout isotopes appear worldwide from the early 1950s.

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    The Anthropocene is functionally and stratigraphically distinct from the HoloceneRadiogenic signatures in contemporary sediments and ice

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Earth and its record · Review of the field

    The source reads: Fallout from thermonuclear weapons tests that began in 1952 C.E. ... left a clear global signature ... The appearance of a 239Pu fallout signature in 1951 C.E.

What this does not establish

Worldwide but uneven: the review says the fallout is concentrated in the mid-latitudes and greatest in the Northern Hemisphere.

Later work looked for

Crossref, 2017 on, "Anthropocene stratigraphic markers Crawford Lake GSSP": the working group’s 2024 proposal lists the same families of marker (plutonium fallout, fly ash and black carbon, new materials, carbon and nitrogen isotope shifts, species introductions); nothing found that withdraws them.

Claim 19 · checked 24 September 2026 · AI-assisted audit

Claim: A globally synchronous marker with a sharp onset, which is what a boundary definition needs.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.

What this does not establish

The working group’s judgement. The review itself notes that the radiocarbon bomb peak is diachronous between hemispheres; plutonium was its preferred marker.

Claim 20 · checked 24 September 2026 · AI-assisted audit

Claim: Fly ash particles from combustion in sediments and glacial ice.

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    The Anthropocene is functionally and stratigraphically distinct from the HoloceneNew anthropogenic materials, and reference 31

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Earth and its record · Review of the field

    The source reads: Fossil fuel combustion disseminates unburnt particles as black carbon (BC), Inorganic Ash Spheres (IAS) and Spherical Carbonaceous Particles (SCPs). ... BC, IAS and SCPs, being airborne particulates, leave a permanent marker within both sediments and glacial ice. ... Spheroidal carbonaceous fly ash particles provide a globally synchronous stratigraphic marker for the Anthropocene

Later work looked for

Crossref, 2017 on, "Anthropocene stratigraphic markers Crawford Lake GSSP": the working group’s 2024 proposal lists the same families of marker (plutonium fallout, fly ash and black carbon, new materials, carbon and nitrogen isotope shifts, species introductions); nothing found that withdraws them.

Corrected

24 September 2026. Previously: “Fly ash particles from combustion in lake and marine sediments.” The review reports these particles in lake cores and in sediments and glacial ice generally; it does not single out marine sediments, and it does name ice.

Claim 21 · checked 24 September 2026 · AI-assisted audit

Claim: Industrial activity recorded far from where it happened.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

Follows from the particles being airborne, which the review states.

Claim 22 · checked 24 September 2026 · AI-assisted audit

Claim: Concrete, aluminium and plastics as sedimentary components.

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

Later work looked for

Crossref, 2017 on, "Anthropocene stratigraphic markers Crawford Lake GSSP": the working group’s 2024 proposal lists the same families of marker (plutonium fallout, fly ash and black carbon, new materials, carbon and nitrogen isotope shifts, species introductions); nothing found that withdraws them.

Claim 23 · checked 24 September 2026 · AI-assisted audit

Claim: Materials rare or absent in earlier rock, arriving in bulk since the mid-twentieth century.

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    The Anthropocene is functionally and stratigraphically distinct from the HoloceneNew anthropogenic materials

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Earth and its record · Review of the field

    The source reads: elemental aluminum, almost unknown in native form before the 19th century, has seen 98% of its cumulative global production of ~500 Tg since 1950 C.E. ... manufacture of new organic polymers (plastics), initially developed in the early 1900s, sharply climbed from the 1950s

What this does not establish

Concrete is not new: the review notes it was invented by the Romans and became a primary building material from the Second World War.

Later work looked for

Crossref, 2017 on, "Anthropocene stratigraphic markers Crawford Lake GSSP": the working group’s 2024 proposal lists the same families of marker (plutonium fallout, fly ash and black carbon, new materials, carbon and nitrogen isotope shifts, species introductions); nothing found that withdraws them.

Corrected

24 September 2026. Previously: “Materials with no natural precedent entering the rock record.” The review calls aluminium almost unknown in native form, not unknown, and dates concrete to the Romans; what it reports is the mid-century surge.

Claim 24 · checked 24 September 2026 · AI-assisted audit

The formal proposal was not accepted

Claim: The formal proposal was not accepted

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

Claim 25 · checked 24 September 2026 · AI-assisted audit

Claim: A working group spent fifteen years developing a proposal to define an Anthropocene epoch beginning around 1950, with the sediment of Crawford Lake in Ontario as its reference point.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

Corrected

24 September 2026. Previously: “A working group spent years developing a proposal to define an Anthropocene epoch beginning in the mid-twentieth century, with a specific site as its reference point.” Made specific from the IUGS account: 2009 to 2024, ~1950, Crawford Lake.

Claim 26 · checked 24 September 2026 · AI-assisted audit

Claim: In March 2024 the Subcommission on Quaternary Stratigraphy rejected it, 12 votes to 4 with 3 abstentions, and the International Union of Geological Sciences upheld the result over a challenge to how the vote was run.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    The Anthropocene (statement on the vote of the Subcommission on Quaternary Stratigraphy)letterhead date and p. 2

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: March 20, 2024 ... It ended on 4th March ... a decisive rejection of the Anthropocene proposal: 4 votes in favour; 12 votes against; and 3 abstentions. ... a campaign questioning the legitimacy of the vote on procedural grounds ... The vote of the SQS has been recognized as valid by the ICS Executive

What this does not establish

The account of the procedure is the union’s own. Two members who did not vote contested its legitimacy.

Later work looked for

Crossref, 2024 on, "Anthropocene vote Subcommission Quaternary Stratigraphy rejected" and "Anthropocene event epoch response": commentary and replies on both sides (Chakraborty 2024 for the epoch; Rull 2026 on the rejection), and nothing that reverses the vote; the chart read is v2026/06.

Corrected

24 September 2026. Previously: “It was put to the relevant stratigraphic body and was not ratified.” It was voted down, not left unratified, and the page cited only the chart for it; the IUGS statement is added as the source.

Claim 27 · checked 24 September 2026 · AI-assisted audit

Claim: The International Chronostratigraphic Chart, which is the formal record of these divisions, still ends with the Holocene.

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    International Chronostratigraphic Chartv2026/06, Quaternary column

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: Quaternary Holocene Pleistocene

    The word Anthropocene does not appear on the chart.

Later work looked for

Crossref, 2024 on, "Anthropocene vote Subcommission Quaternary Stratigraphy rejected" and "Anthropocene event epoch response": commentary and replies on both sides (Chakraborty 2024 for the epoch; Rull 2026 on the rejection), and nothing that reverses the vote; the chart read is v2026/06.

Claim 28 · checked 24 September 2026 · AI-assisted audit

What it should be called

Claim: What it should be called

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: The disagreement is about a chart, and the chart is not the planet.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

The page’s own line. It follows from claims 10 and 32: neither side disputes the human signal.

Claim 30 · checked 24 September 2026 · AI-assisted audit

Whether it should be an epoch at all

Claim: Whether it should be an epoch at all

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: The objections were about scale and timing rather than about whether the signal is there.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

Follows from the three objections the IUGS lists (claim 33): two are about when and where human effects began, one about the length of the unit.

Corrected

24 September 2026. Previously: “Objections were substantially about scale rather than about evidence.” The IUGS lists three objections and only one is about scale; the other two are about the timing and spread of the evidence, so “rather than about evidence” was wrong.

Claim 32 · checked 24 September 2026 · AI-assisted audit

Claim: As the International Union of Geological Sciences summarised them, human effects on the planet long predate 1950; they began at different times in different places, so no single horizon marks their onset; and a unit spanning less than a human lifetime sits uncomfortably on a chart whose other units span thousands or millions of years.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    The Anthropocene (statement on the vote of the Subcommission on Quaternary Stratigraphy)p. 1

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: long predate the mid 20 th century ... less than a single human lifetime, it sits uncomfortably within the GTS where the units span thousands or even millions of years ... spatially and temporally variable, so that their onset cannot be adequately represented by an isochronous horizon

What this does not establish

These are the critics’ positions as the union summarised them, not a finding.

Corrected

24 September 2026. Previously: “An epoch defined seventy years ago is extremely short by the standards of a chart whose other units run to millions of years, and a boundary placed in living memory is hard to treat as stratigraphy rather than as commentary.” Unsourced and incomplete: the chart’s units span thousands of years as well as millions (the Holocene is 11,700 years), and the IUGS names two further objections the page left out. The “commentary” point is now attributed to its authors (claim 34).

Claim 33 · checked 24 September 2026 · AI-assisted audit

Claim: Two critics had gone further in 2016, arguing that the concept rests more on direct human observation than on a stratigraphic record, and that the drive to recognise it may be political rather than scientific.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    The “Anthropocene” epoch: Scientific decision or political statement?masthead, byline and abstract

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Argument

    The source reads: MARCH/APRIL 2016 ... Stanley C. Finney ... and Lucy E. Edwards ... 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.

Other readings

The working group holds that the Anthropocene represents geological reality and has a stratigraphic signature in many kinds of deposit.

Corrected

24 September 2026. Previously: “” Replaces the unsourced “stratigraphy rather than commentary” line with the argument it echoed, attributed to Finney and Edwards.

Claim 34 · checked 24 September 2026 · AI-assisted audit

Claim: An alternative, that the human interval is better described as an ongoing event rather than as a unit of time, was published in 2022 by eleven researchers, before the working group had submitted its proposal.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    The Anthropocene as an Event, not an Epochtitle page (dated 19.01.22, eleven authors); The Anthropocene as a geological epoch; The Anthropocene as a geological event

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: Final 19.01.22 The Anthropocene as an Event, not an Epoch PHILIP GIBBARD1, MICHAEL WALKER2,3, ANDREW BAUER4, MATTHEW EDGEWORTH5, LUCY EDWARDS6, ERLE ELLIS7, STANLEY FINNEY8, JACQUELYN L. GILL9, MARK MASLIN10,11, DOROTHY MERRITTS12, WILLIAM RUDDIMAN13 ... but no formal proposal has yet been made ... it be defined as an ongoing event

  • Supports

    The Anthropocene (statement on the vote of the Subcommission on Quaternary Stratigraphy)p. 1

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: finally submitting a report to the SQS in late October 2023

Corrected

24 September 2026. Previously: “was published by eleven Quaternary scientists while the proposal was live.” The paper itself says no formal proposal had yet been made, and the proposal was submitted in October 2023; its authors include an anthropologist, an archaeologist and geographers as well as Quaternary scientists.

Claim 35 · checked 24 September 2026 · AI-assisted audit

Claim: Their objection is that a series with a fixed horizon and a precise start date “fails to account for the diachronic nature of human impacts”, where an event carries the unevenness in space and time that an epoch has to flatten.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    The Anthropocene as an Event, not an Epochabstract

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Argument

    The source reads: at a fixed horizon and with a precise global start date, has been proposed, but fails to account for the diachronic nature of human impacts on global environmental systems during the late Quaternary ... encapsulating spatial and temporal heterogeneity

Other readings

The working group considered the event reading and rejected it as inconsistent with the stratigraphic evidence (claim 37).

Claim 36 · checked 24 September 2026 · AI-assisted audit

Claim: The working group considered the event reading in detail and found it inconsistent with the stratigraphic evidence.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.

What this does not establish

This is the working group’s own assessment, in a submission that was not peer reviewed; the event paper’s authors and the voters who rejected the proposal did not accept it.

Corrected

24 September 2026. Previously: “” The passage reported only one side of a disagreement; the working group’s reply is added.

Claim 37 · checked 24 September 2026 · AI-assisted audit

When it would start

Claim: When it would start

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: Proposals have included the spread of farming, the exchange of species after the colonisation of the Americas, the industrial revolution and the nuclear tests.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    The Anthropocene is functionally and stratigraphically distinct from the HoloceneIntroduction; Radiogenic signatures

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Review of the field

    The source reads: an ‘early Anthropocene’ reflecting the advent of agriculture ... the Columbian Exchange of Old World and New World species following colonization of the Americas ... the beginning of the Industrial Revolution ... The start of the Anthropocene might be defined by ... detonation of the Trinity atomic device ... the fallout from nuclear weapons testing

Corrected

24 September 2026. Previously: “the exchange of species after 1492” The cited review dates the Columbian Exchange to the colonisation of the Americas and gives no year; 1492 was not in any source read.

Claim 39 · checked 24 September 2026 · AI-assisted audit

Claim: Each has a defensible case and a different implication about what the concept is naming.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

The page’s reading; the event paper makes the same point about the candidate dates.

  • Context

    The Anthropocene as an Event, not an EpochFigure 1 caption

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: A number of different starting dates have been proposed for the Anthropocene that correspond to different environmental and social changes

Claim 40 · checked 24 September 2026 · AI-assisted audit

Claim: The working group’s answer was that only the mid-twentieth century carries an array of markers that are effectively the same age everywhere.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    The Anthropocene Epoch and Crawfordian Age: proposals by the Anthropocene Working Group (Part 1)abstract, p. 3

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Argument

    The source reads: the mid-20th century was found to be the only one associated with an extensive array of effectively globally isochronous geological markers

    The comparison is among the start dates the working group considered, which section 2 goes through (an early Anthropocene, the Orbis spike of about 1610, an event).

What this does not establish

The working group’s own conclusion, among the start dates it considered, in a submission that was not peer reviewed.

Corrected

24 September 2026. Previously: “A boundary that could reasonably be placed at four different times across eight thousand years is not yet the kind of boundary stratigraphy draws.” The page drew its own conclusion against the working group, whose case is that the four candidates are not equal as boundaries. Both sides are now reported with their sources.

Claim 41 · checked 24 September 2026 · AI-assisted audit

Claim: Its critics had already objected that a line there relegates considerable earlier human change to a “pre-Anthropocene”.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.

Written in 2016, about a beginning in 1945, which is the same mid-century line.

  • Supports

    The “Anthropocene” epoch: Scientific decision or political statement?abstract

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Argument

    The source reads: especially with its recently proposed beginning in 1945; it is that of a human lifespan, and that definition relegates considerable anthropogenic change to a “pre-Anthropocene.”

Claim 42 · checked 24 September 2026 · AI-assisted audit

What was read