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dc.contributor.authorCostard, F.
dc.contributor.authorSéjourné, A.
dc.contributor.authorLagain, Anthony
dc.contributor.authorOrmö, J.
dc.contributor.authorRodriguez, J.A.P.
dc.contributor.authorClifford, S.
dc.contributor.authorBouley, S.
dc.contributor.authorKelfoun, K.
dc.contributor.authorLavigne, F.
dc.date.accessioned2019-10-04T03:03:04Z
dc.date.available2019-10-04T03:03:04Z
dc.date.issued2019
dc.identifier.citationCostard, F. and Séjourné, A. and Lagain, A. and Ormö, J. and Rodriguez, J.A.P. and Clifford, S. and Bouley, S. et al. 2019. The Lomonosov Crater Impact Event: A Possible Mega-Tsunami Source on Mars. JGR Planets. 124 (7): pp. 1840-1851.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/76439
dc.identifier.doi10.1029/2019JE006008
dc.description.abstract

©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.

dc.languageEnglish
dc.publisherAMER GEOPHYSICAL UNION
dc.relation.sponsoredbyhttp://purl.org/au-research/grants/arc/FT170100024
dc.subjectScience & Technology
dc.subjectPhysical Sciences
dc.subjectGeochemistry & Geophysics
dc.subjecttsunami
dc.subjectMars
dc.subjectLomonosov
dc.subjectcrater
dc.subjectnorthern ocean
dc.subjectCRETACEOUS-TERTIARY BOUNDARY
dc.subjectCHESAPEAKE BAY IMPACT
dc.subjectNORTHERN LOWLANDS
dc.subjectTARGET CRATERS
dc.subjectLOCKNE
dc.subjectCLIMATE
dc.subjectOCEANS
dc.subjectMORPHOLOGY
dc.subjectEVOLUTION
dc.subjectSHORELINE
dc.titleThe Lomonosov Crater Impact Event: A Possible Mega-Tsunami Source on Mars
dc.typeJournal Article
dcterms.source.volume124
dcterms.source.number7
dcterms.source.startPage1840
dcterms.source.endPage1851
dcterms.source.issn2169-9097
dcterms.source.titleJGR Planets
dc.date.updated2019-10-04T03:03:03Z
curtin.note

Copyright © 2019 American Geophysical Union

curtin.departmentSchool of Earth and Planetary Sciences (EPS)
curtin.accessStatusOpen access
curtin.facultyFaculty of Science and Engineering
curtin.contributor.orcidLagain, Anthony [0000-0002-5391-3001]
dcterms.source.eissn2169-9100


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