{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,18]],"date-time":"2026-05-18T16:13:01Z","timestamp":1779120781262,"version":"3.51.4"},"reference-count":30,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2008,2,18]],"date-time":"2008-02-18T00:00:00Z","timestamp":1203292800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Terra Nova"],"published-print":{"date-parts":[[2008,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>In a provocative paper <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"#b12\">Gasperini <jats:italic>et\u00a0al.<\/jats:italic> (2007)<\/jats:ext-link> suggest that Lake Cheko, a \u223c300\u2010m\u2010wide lake situated a few kilometres downrange from the assumed epicentre of the 1908 Tunguska event, is an impact crater. In this response, we present several lines of observational evidence that contradicts the impact hypothesis for the lake\u2019s origin: un\u2010crater\u2010like aspects of the lake morphology, the lack of impactor material in and around the lake, and the presence of apparently unaffected mature trees close to the lake. We also show that a tensile strength of 10\u201340\u2003MPa is required for an asteroid fragment to traverse the Earth\u2019s atmosphere and reach the surface intact and with sufficient velocity to excavate a crater the size of Lake Cheko. Inferred tensile strengths of large stony meteorites during atmospheric disruption are 10\u2013100 times lower. We therefore conclude that Lake Cheko is highly unlikely to be an impact crater.<\/jats:p>","DOI":"10.1111\/j.1365-3121.2008.00791.x","type":"journal-article","created":{"date-parts":[[2008,2,18]],"date-time":"2008-02-18T08:58:56Z","timestamp":1203325136000},"page":"165-168","source":"Crossref","is-referenced-by-count":22,"title":["Evidence that Lake Cheko is not an impact crater"],"prefix":"10.1111","volume":"20","author":[{"given":"G. S.","family":"Collins","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"N.","family":"Artemieva","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"K.","family":"W\u00fcnnemann","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"P. A.","family":"Bland","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"W. U.","family":"Reimold","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"C.","family":"Koeberl","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2008,2,18]]},"reference":[{"key":"e_1_2_8_2_1","unstructured":"Artemieva N.andShuvalov V. 2007.3D effects of Tunguska Event on the ground and in the atmosphere. Lunar and Planetary Science Conference XXXVIII Lunar and Planetary Institute Houston TX abstract no. 1537."},{"key":"e_1_2_8_3_1","unstructured":"Attrep M. Orth C.J. Quintana L.R. Shoemaker C.S. Shoemaker E.M.andTaylor S.R. 1991.Chemical fractionation of siderophile elements in impactites from Australian meteorite craters. 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