# A small or differentiated extraterrestrial body (such as an iridium-poor iron meteorite) left the Greenland…

> Still possible: A small or differentiated extraterrestrial body (such as an iridium-poor iron meteorite) left the Greenland platinum signal, without a…

Source: https://mysteriesdept.com/mysteries/younger-dryas-impact/answers/ANS0D51XCQ621B8/a-small-or-differentiated-extraterrestrial-body-such-as-an  
Publisher: Mysteries Department  
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[Questions](https://mysteriesdept.com/questions)[Younger Dryas impact hypothesis](https://mysteriesdept.com/mysteries/younger-dryas-impact)[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)Answer

Answer · Younger Dryas impact hypothesis

# A small or differentiated extraterrestrial body (such as an iridium-poor iron meteorite) left the Greenland…

A small or differentiated extraterrestrial body (such as an iridium-poor iron meteorite) left the Greenland platinum signal, without a continental catastrophe.

**Still possible** Answers **1** questionPublished0

## Where it stands

**Still possible** Its tests haven't settled it: one piece of evidence for, one against. It needs two reviews to be accepted.

## What it predicts

- The platinum spike carries meteoritic osmium isotope ratios and a platinum-group pattern matching iron meteorites.
- No continent-wide fire or proxy layer accompanies it.

## What would rule it out

- Osmium isotopes or tephra in the spike interval show a volcanic source.

## Evidence 1 for · 1 against

[The GISP2 spike has Pt/Ir ratios above all known terrestrial and chondritic materials and very high Pt/Al…](https://mysteriesdept.com/mysteries/younger-dryas-impact/evidence/EVD0D51XCZ0731Q/the-gisp2-spike-has-pt-ir-ratios-above-all-known-terrestrial)

Supported

FOR

[The spike lasts about 14 years, which fits a fissure eruption better than an instantaneous event.](https://mysteriesdept.com/mysteries/younger-dryas-impact/evidence/EVD0D51XD6T6GFP/the-spike-lasts-about-14-years-which-fits-a-fissure-eruption)

Suggestive

AGAINST

## The questions it answers

[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 likelyNo impact or airburst occurred; the proposed markers are terrestrial or background cosmic material…

## Cite it

```
Mysteries Department. (2026). A small or differentiated extraterrestrial body (such as an iridium-poor iron meteorite) left the Greenland… [Answer ANS0D51XCQ621B8]. https://mysteriesdept.com/r/ANS0D51XCQ621B8
```

Key

**ANS** 0D51XCQ621B8

Kind

Answer · hypothesis

Origin

Published

Version

1

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