Analysis of sediments from LakeCheko, including geochemistry, 137Cs,210Pb radioisotopes dating, and pollencontent, together with the funnelshapedmorphology of the lakesbottom and its peculiar acousticstratigraphy, are all consistent withthe idea of a very young (100 years)lake, filling an impact crater. Thiscrater could have been produced bythe impact of a small, m-size fragmentof the Tunguska asteroid ⁄comet thatsurvived the atmospheric blast.
Sediments from Lake Cheko (Siberia), a possible impact crater forthe 1908 Tunguska Event / L., Gasperini; E., Bonatti; S., Albertazzi; L., Forlani; Accorsi, Carla Alberta; G., Longo; M., Ravaioli; F., Alvisi; A., Polonia; F., Sacchetti. - In: TERRA NOVA. - ISSN 0954-4879. - ELETTRONICO. - 21(6):(2009), pp. 489-494. [10.1111/j.1365-3121.2009.00906.x]
Sediments from Lake Cheko (Siberia), a possible impact crater forthe 1908 Tunguska Event
ACCORSI, Carla Alberta;
2009-01-01
Abstract
Analysis of sediments from LakeCheko, including geochemistry, 137Cs,210Pb radioisotopes dating, and pollencontent, together with the funnelshapedmorphology of the lakesbottom and its peculiar acousticstratigraphy, are all consistent withthe idea of a very young (100 years)lake, filling an impact crater. Thiscrater could have been produced bythe impact of a small, m-size fragmentof the Tunguska asteroid ⁄comet thatsurvived the atmospheric blast.
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