# Meltzer 2014: Chronological evidence fails to support claim of an isochronous widespread layer of cosmic impact indicators dated to 12,800 years ago

> David J. Meltzer, Vance T. Holliday, Michael D. Cannon et al., 2014. 6 records on Mysteries Department cite it. The chronological audit that the…

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# Chronological evidence fails to support claim of an isochronous widespread layer of cosmic impact indicators dated to 12,800 years ago

David J. Meltzer, Vance T. Holliday, Michael D. Cannon et al., 2014. _Proceedings of the National Academy of Sciences 111(21)_.

Audits the age control at the 29 sites where proponents report the boundary layer. Several have no age control, others irrelevant ages or flawed age-depth interpolations; only 3 of 29 fall within the proponents' own window for the Younger Dryas onset.

**Younger Dryas impact hypothesis** Articledoi: **[10.1073/pnas.1401150111](https://doi.org/10.1073/pnas.1401150111)** Checked against the original0

## What it's used for here

The chronological audit that the synchrony question turns on.

## Cited by on this site 6 records

[The claimed layers are of different ages, or their ages are not known well enough to say.](https://mysteriesdept.com/mysteries/younger-dryas-impact/answers/ANS0D51XE623WP9/the-claimed-layers-are-of-different-ages-or-their-ages-are)

Answer

ANS

[Only 3 of the 29 claimed sites have age control placing the layer at the onset.](https://mysteriesdept.com/mysteries/younger-dryas-impact/evidence/EVD0D51XB0G7CCW/only-3-of-the-29-claimed-sites-have-age-control-placing-the)

Evidence

EVD

[Several claimed sites have no age control, nearly a dozen use flawed age-depth interpolations, and several…](https://mysteriesdept.com/mysteries/younger-dryas-impact/evidence/EVD0D51XEDW7MYR/several-claimed-sites-have-no-age-control-nearly-a-dozen-use)

Evidence

EVD

[Meltzer and colleagues find only 3 of 29 claimed sites dated to the onset](https://mysteriesdept.com/mysteries/younger-dryas-impact/events/EVT0D51X5CT3JQ3/meltzer-and-colleagues-find-only-3-of-29-claimed-sites-dated)

EVT

[The Younger Dryas impact hypothesis](https://mysteriesdept.com/mysteries/younger-dryas-impact)

The mystery article

MYS

[Is the claimed boundary layer the same age at every site?](https://mysteriesdept.com/mysteries/younger-dryas-impact/questions/QST0D51X8JC0DHZ/is-the-claimed-boundary-layer-the-same-age-at-every-site)

Question

QST

## Cite it

```
Meltzer, D. J., Holliday, V. T., Cannon, M. D., & Miller, D. S. (2014). Chronological evidence fails to support claim of an isochronous widespread layer of cosmic impact indicators dated to 12,800 years ago. Proceedings of the National Academy of Sciences 111(21). https://doi.org/10.1073/pnas.1401150111
```

[Read it free at doi.org](https://doi.org/10.1073/pnas.1401150111)

Key

**SRC** 0D51WRER0TD5

Kind

Journal article

Rights

The publisher's

Checked

Against the published article

Added by

[apollo](https://mysteriesdept.com/u/apollo)

The record

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