Lake Cheko

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Lake Cheko
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Geographical location Krasnoyarsk Region ( Russia )
Tributaries Kimchu
Drain Kimtschu → Tschunja → Stony Tunguska → Yenisei
Data
Coordinates 60 ° 57 '50 "  N , 101 ° 51' 36"  E Coordinates: 60 ° 57 '50 "  N , 101 ° 51' 36"  E
Lake Cheko (Krasnoyarsk Territory)
Lake Cheko
length 708 m
width 364 m
Maximum depth 54 m
Template: Infobox Lake / Maintenance / EVIDENCE LAKE WIDTH Template: Infobox Lake / Maintenance / EVIDENCE MAX DEPTH

Lake Cheko ( Russian Чеко ) is a small freshwater lake in the Krasnoyarsk region (Siberia).

Scientists have speculated that this lake is an impact crater that formed during the Tunguska event . However, this theory is considered to be refuted due to more recent findings on the age of the lake.

Determining the age of the lake can help clarify this question. The lake is not shown on maps before 1908, but maps of this age are incomplete and imprecise. Based on the thickness of the sediment layer , an age of several thousand years has been suggested. During an investigation by Luca Gasperini, Enrico Bonatti and Giuseppe Longo in 2007, the lake was examined with an echo sounder , among other things . The funnel-like shape of the lake determined in this way and a striking echo below the lake floor indicate an impact event . A slight magnetic anomaly was also detected, an indication of a metallic impact body.

Russian scientists published research results in January 2017, according to which the lake is very likely more than 280 years old and is therefore unlikely to be the impact crater of the Tunguska event.

Web links

Individual evidence

  1. ↑ M. Pipan, L. Baradello, E. Forte, L. Gasperini, E. Bonatti, Giuseppe Longo: Ground penetrating radar study of the Cheko Lake area, Siberia (PDF; 69 kB). In: Proc. SPIE 4084, Eighth International Conference on Ground Penetrating Radar , 329 April 27, 2000. doi : 10.1117 / 12.383586
  2. ↑ L. Gasperini, F. Alvisi et al. a .: A possible impact crater for the 1908 Tunguska Event. In: Terra Nova. 19, 2007, pp. 245-251, doi : 10.1111 / j.1365-3121.2007.00742.x .
  3. ↑ Beautiful and mysterious: but was Lake Cheko formed from the exploding Tunguska meteorite? Retrieved January 29, 2017 .
  4. ↑ Tunguska catastrophe: sediment dating contradicts impact theory. Retrieved January 29, 2017 .
  5. ↑ KP Florenskiy: Preliminary results from the 1961 combined Tunguska meteorite expedition . In: Meteoritica 23, 1963, pp. 3–29 (English)
  6. ↑ Luca Gasperini, Enrico Bonatti, Giuseppe Longo: Tunguska explosion: the day on which the sky parted . In: Spiegel-Online of June 27, 2008, accessed on January 20, 2013
  7. ↑ Beautiful and mysterious: but was Lake Cheko formed from the exploding Tunguska meteorite? Retrieved January 29, 2017 .