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
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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