# The markers are background cosmic dust, volcanic or anthropogenic spherules, fire products or misidentified…

> Most likely: The markers are background cosmic dust, volcanic or anthropogenic spherules, fire products or misidentified carbon, concentrated by…

Source: https://mysteriesdept.com/mysteries/younger-dryas-impact/answers/ANS0D51XGM601YH/the-markers-are-background-cosmic-dust-volcanic-or  
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[Questions](https://mysteriesdept.com/questions)[Younger Dryas impact hypothesis](https://mysteriesdept.com/mysteries/younger-dryas-impact)[Are the proposed markers (microspherules, nanodiamonds, shocked quartz, meltglass) reproducible and diagnostic of impact?](https://mysteriesdept.com/mysteries/younger-dryas-impact/questions/QST0D51X8T620G9/are-the-proposed-markers-microspherules-nanodiamonds-shocked)Answer

Answer · Younger Dryas impact hypothesis

# The markers are background cosmic dust, volcanic or anthropogenic spherules, fire products or misidentified…

The markers are background cosmic dust, volcanic or anthropogenic spherules, fire products or misidentified carbon, concentrated by sedimentary processes.

**Most likely** Answers **1** questionPublished0

## Where it stands

**Most likely** Its tests supported it: three pieces of evidence for, none against. It needs two reviews to be accepted.

## What it predicts

- Markers appear throughout long sections with peaks tied to slow sedimentation or surface stability.
- Chemistry of spherules matches local or volcanic sources.

## What would rule it out

- Unambiguous shock features or meteoritic isotope signatures confined to the boundary at several independent sites.

## Evidence 3 for · none against

[Claimed nanodiamonds were identified as graphene and graphene-oxide aggregates.](https://mysteriesdept.com/mysteries/younger-dryas-impact/evidence/EVD0D51XH3T39J1/claimed-nanodiamonds-were-identified-as-graphene-and)

Supported

FOR

[Osmium isotopes at Hall's Cave point to volcanic sources for the boundary anomalies.](https://mysteriesdept.com/mysteries/younger-dryas-impact/evidence/EVD0D51XHBM1HNJ/osmium-isotopes-at-halls-cave-point-to-volcanic-sources-for)

Suggestive

FOR

[The 2009 independent study found no support at seven sites, including two of the originals.](https://mysteriesdept.com/mysteries/younger-dryas-impact/evidence/EVD0D51XGW059BP/the-2009-independent-study-found-no-support-at-seven-sites)

Supported

FOR

## The questions it answers

[Are the proposed markers (microspherules, nanodiamonds, shocked quartz, meltglass) reproducible and diagnostic of impact?](https://mysteriesdept.com/mysteries/younger-dryas-impact/questions/QST0D51X8T620G9/are-the-proposed-markers-microspherules-nanodiamonds-shocked)

Part of [Did an extraterrestrial impact or airburst occur at the onset of the Younger Dryas, about 12,800 years ago?](https://mysteriesdept.com/mysteries/younger-dryas-impact/questions/QST0D51X8AJ1304/did-an-extraterrestrial-impact-or-airburst-occur-at-the)

Most likelyThe markers are background cosmic dust, volcanic or anthropogenic spherules, fire products or misidentified…

## Cite it

```
Mysteries Department. (2026). The markers are background cosmic dust, volcanic or anthropogenic spherules, fire products or misidentified… [Answer ANS0D51XGM601YH]. https://mysteriesdept.com/r/ANS0D51XGM601YH
```

Key

**ANS** 0D51XGM601YH

Kind

Answer · hypothesis

Origin

Published

Version

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