The Lomonosov Crater Impact Event: A Possible Mega-Tsunami Source on Mars
MetadataShow full item record
Funding and Sponsorship
Copyright © 2019 American Geophysical Union
©2019. American Geophysical Union. All Rights Reserved. Recent research suggests that major meteorite impact events into a Late Hesperian/Early Amazonian ocean likely produced a mega-tsunami that would have resurfaced coastal areas in northwestern Arabia Terra. The orientations of the associated lobate deposits, a conspicuous type of landforms called Thumbprint Terrain, suggests that if an impact event triggered the mega-tsunami, the most likely location of the source crater is within the northern plains regions situated north of Arabia Terra. This study focuses on the identification of impact craters that impacted into the ocean and are likely to have produced the tsunami. We selected 10 complex impact craters, based on their diameters, location, and geomorphic characteristics. Of those, the Late Hesperian ~120-km-diameter Lomonosov crater exhibits a unique topographic plan view asymmetry (compared to other similar-sized and similar-aged craters in the northern plains such as Micoud, Korolev, and Milankovic). We attribute its broad and shallow rim, in part, to an impact into a shallow ocean as well as its subsequent erosion from the collapsing transient water cavity. The likely marine formation of the Lomonosov crater, and the apparent agreement in its age with that of the Thumbprint Terrain unit (~3 Ga), strongly suggests that it was the source crater of the tsunami. These results have implications for the stability of a late northern ocean on Mars.
Showing items related by title, author, creator and subject.
Winding down the Chicxulub impact: The transition between impact and normal marine sedimentation near ground zeroWhalen, M.T.; Gulick, S.P.S.; Lowery, C.M.; Bralower, T.J.; Morgan, J.V.; Grice, Kliti ; Schaefer, Bettina; Smit, J.; Ormö, J.; Wittmann, A.; Kring, D.A.; Lyons, S.; Goderis, S. (2020)The Chicxulub impact led to the formation of a ~ 200-km wide by ~1-km deep crater on México's Yucatán Peninsula. Over a period of hours after the impact the ocean re-entered and covered the impact basin beneath several ...
Schaefer, B.; Grice, Kliti ; Coolen, Marco ; Summons, R.E.; Cui, X.; Bauersachs, T.; Schwark, Lorenz ; Böttcher, M.E.; Bralower, T.J.; Lyons, S.L.; Freeman, K.H.; Cockell, C.S.; Gulick, S.P.S.; Morgan, J.V.; Whalen, M.T.; Lowery, C.M.; Vajda, V. (2020)The Chicxulub crater was formed by an asteroid impact at ca. 66 Ma. The impact is considered to have contributed to the end-Cretaceous mass extinction and reduced productivity in the world's oceans due to a transient ...
Gulick, S.P.S.; Bralower, T.J.; Ormö, J.; Hall, B.; Grice, Kliti ; Schaefer, Bettina; Lyons, S.; Freeman, K.H.; Morgan, J.V.; Artemieva, N.; Kaskes, P.; De Graaff, S.J.; Whalen, M.T.; Collins, G.S.; Tikoo, S.M.; Verhagen, C.; Christeson, G.L.; Claeys, P.; Coolen, Marco ; Goderis, S.; Goto, K.; Grieve, R.A.F.; McCall, N.; Osinski, G.R.; Rae, A.S.P.; Riller, U.; Smit, J.; Vajda, V.; Wittmann, A. (2019)Highly expanded Cretaceous-Paleogene (K-Pg) boundary section from the Chicxulub peak ring, recovered by International Ocean Discovery Program (IODP)-International Continental Scientific Drilling Program (ICDP) Expedition ...