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dc.contributor.authorMichaud, Kain
dc.contributor.otherQueen's University (Kingston, Ont.). Theses (Queen's University (Kingston, Ont.))en
dc.date2011-04-29 17:10:10.008en
dc.date.accessioned2011-05-02T18:13:59Z
dc.date.available2011-05-02T18:13:59Z
dc.date.issued2011-05-02T18:13:59Z
dc.identifier.urihttp://hdl.handle.net/1974/6486
dc.descriptionThesis (Master, Geological Sciences & Geological Engineering) -- Queen's University, 2011-04-29 17:10:10.008en
dc.description.abstractABSTRACT The Eocene Roda Formation in northern Spain documents the deposits from a range of coastal depositional environments. These include alluvial plains, distributary channels, mouth bars, upper to lower-shorefaces, and tidal shelf ridges. Eighteen progradational sand tongues that are interpreted as parasequences compose two third-order sequences. Sequence 1 accumulated in an environment with strong tidal currents and high rates of progradation, while Sequence 2 was deposited under relatively weaker currents and higher rates of aggradation, which produced a higher mudstone:sandstone ratio. The stratigraphy highlights the transgressive origin of six tidal shelf ridges, three in each sequence, that overlie regressive deltaic tongues. Sequence 1 shelf ridges are composed almost entirely of cross-bedded sandstones, whereas Sequence 2 ridges are composed of a mixture of cross-bedded and ripple-laminated deposits. Ridges in both sequences contain bioturbation that is typical of the Cruziana Ichnofacies, and that indicates a marine origin. The tidal ridges are stratigraphically located at or near the point of maximum third-order regression, and are not found within early highstand or late transgressive deposits― times of high relative sea level when the deltaic shoreline did not protrude significantly. Tidal currents were accentuated at the coast when the delta complex had prograded several kilometres into the basin, while during times of high relative sea level, the basin was wider and tidal currents were weaker, consequently leading to a lack of tidal deposits. The tidal ridges are, thus, interpreted as being headland-associated deposits.en
dc.languageenen
dc.language.isoenen
dc.relation.ispartofseriesCanadian thesesen
dc.rightsThis publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.en
dc.subjectRodaen
dc.subjectridgeen
dc.subjectbaren
dc.subjecttideen
dc.subjectheadlanden
dc.subjectbanken
dc.subjectspainen
dc.subjectforelanden
dc.subjectichnologyen
dc.subjectsedimentologyen
dc.subjectfaciesen
dc.subjectarchitectureen
dc.subjecteoceneen
dc.subjectypresianen
dc.subjectillerdianen
dc.subjectEsdolomadaen
dc.subjectstratigraphyen
dc.subjectdistributaryen
dc.subjectchannelen
dc.subjectdeltaen
dc.subjectgilberten
dc.subjectshorefaceen
dc.titleFacies Architecture and Stratigraphy of Tidal Ridges in the Eocene Roda Formation, Northern Spainen
dc.typeThesisen
dc.description.degreeMasteren
dc.contributor.supervisorDalrymple, Robert W.en
dc.contributor.departmentGeological Sciences and Geological Engineeringen


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