# The lake fills a small crater excavated in soft, permafrost ground by a fragment of the body.

> Disputed: The lake fills a small crater excavated in soft, permafrost ground by a fragment of the body.

Source: https://mysteriesdept.com/mysteries/tunguska-event/answers/ANS0D4ECKSR09V9/the-lake-fills-a-small-crater-excavated-in-soft-permafrost  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

---

[Questions](https://mysteriesdept.com/questions)[1908 Tunguska event](https://mysteriesdept.com/mysteries/tunguska-event)[Is Lake Cheko a crater made by a fragment in 1908?](https://mysteriesdept.com/mysteries/tunguska-event/questions/QST0D4ECBG47348/is-lake-cheko-a-crater-made-by-a-fragment-in-1908)Answer

Answer · 1908 Tunguska event

# The lake fills a small crater excavated in soft, permafrost ground by a fragment of the body.

The lake fills a small crater excavated in soft, permafrost ground by a fragment of the body.

**Disputed** Answers **1** questionPublished0

## Where it stands

**Disputed** Three pieces of evidence for, three against. It needs two reviews to be accepted.

## What it predicts

- Sediments above a disturbed base are no older than 1908.
- A dense object or impactor material lies under the lake floor.
- Trees around the lake all postdate 1908.

## What would rule it out

- Lake sediments demonstrably older than 1908, or a full core showing no disturbance or impactor material.

## Evidence 3 for · 3 against

[A rubble-pile body could have shed a boulder that made the lake.](https://mysteriesdept.com/mysteries/tunguska-event/evidence/EVD0D4ECMH6772H/a-rubble-pile-body-could-have-shed-a-boulder-that-made-the)

Speculative

FOR

[Acoustic imaging shows a funnel-shaped floor and deposits the authors read as crater fill.](https://mysteriesdept.com/mysteries/tunguska-event/evidence/EVD0D4ECM1J41HM/acoustic-imaging-shows-a-funnel-shaped-floor-and-deposits)

Suggestive

FOR

[Trees near the lake that germinated after 1908 grew differently from forest trees, consistent with a new lake.](https://mysteriesdept.com/mysteries/tunguska-event/evidence/EVD0D4ECM9C1QJT/trees-near-the-lake-that-germinated-after-1908-grew)

Suggestive

FOR

[137Cs, 210Pb and varves show the lake is much older than 1908.](https://mysteriesdept.com/mysteries/tunguska-event/evidence/EVD0D4ECMS05P0J/137cs-210pb-and-varves-show-the-lake-is-much-older-than-1908)

Supported

AGAINST

[The lake lacks crater morphology and impactor material and has mature trees close by.](https://mysteriesdept.com/mysteries/tunguska-event/evidence/EVD0D4ECN0T4TF6/the-lake-lacks-crater-morphology-and-impactor-material-and)

Supported

AGAINST

[The lake lies about 3.5 km outside the 3-sigma strewn field for the most likely trajectory.](https://mysteriesdept.com/mysteries/tunguska-event/evidence/EVD0D4ECN8M4DGE/the-lake-lies-about-3-5-km-outside-the-3-sigma-strewn-field)

Suggestive

AGAINST

## The questions it answers

[Is Lake Cheko a crater made by a fragment in 1908?](https://mysteriesdept.com/mysteries/tunguska-event/questions/QST0D4ECBG47348/is-lake-cheko-a-crater-made-by-a-fragment-in-1908)

Part of [Why have no fragments of the body been found?](https://mysteriesdept.com/mysteries/tunguska-event/questions/QST0D4ECB8A5SWD/why-have-no-fragments-of-the-body-been-found)

Most likelyThe lake is an older thermokarst or river-plain lake unrelated to the event

## Cite it

```
Mysteries Department. (2026). The lake fills a small crater excavated in soft, permafrost ground by a fragment of the body. [Answer ANS0D4ECKSR09V9]. https://mysteriesdept.com/r/ANS0D4ECKSR09V9
```

Key

**ANS** 0D4ECKSR09V9

Kind

Answer · hypothesis

Origin

Published

Version

1

Added by

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

The record

Every record is open data. Take this one as JSON, with its links and its history.

[JSON](https://mysteriesdept.com/api/v1/records/ANS0D4ECKSR09V9)