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dc.contributor.authorMcllroy, D.
dc.contributor.authorFlint, S.
dc.contributor.authorHowell, J.
dc.contributor.authorTimms, Nicholas Eric
dc.contributor.editorG. D. VEIGA, L. A. SPALLETTI, J. A. HOWELL, E. SCHWARZ
dc.date.accessioned2017-01-30T10:53:00Z
dc.date.available2017-01-30T10:53:00Z
dc.date.created2010-04-29T20:02:52Z
dc.date.issued2005
dc.identifier.citationMcllroy, Duncan and Flint, Stephen and Howell, John and Timms, Nicholas. 2005. Sedimentology of the tide-dominated Jurassic Lajas Formation, Neuquen Basin, Argentina, in G. D. Veiga, L. A. Spalletti, J. A. Howell, E. Schwarz (ed), The Neuquen Basin, Argentina: A Case Study in Sequence Stratigraphy and Basin Dynamics (Geological Society, London, Special Publication Number 252). pp. 83-107. Bath, UK: Geological Society of London.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/6428
dc.identifier.doi10.1144/GSL.SP.2005.252.01.05
dc.description.abstract

Tidal depositional systems are often interpreted as lowstand/transgressive estuarine deposits within sequences that are either wave or river dominated during highstand times. The Middle Jurassic Lajas Formation of the Neuquen Basin, Argentina, comprises 600 m of well-exposed tide-dominated facies deposited within four unconformity bounded sequences, spanning approximately 4.5 Ma. Facies associations include tide dominated deltas, sandy-heterolithic tidal channel fills and extensive progradational tidal-flat successions, which are locally cut by heterolithic tidal channel fills. Despite the narrow bathymetric depositional range and the complex facies variability, flooding surfaces can be defined and mapped along a 48 km-long outcrop belt. These flooding surfaces allow definition of three distinct types of parasequence that exhibit coarsening-upwards, finingupwards and coarsening- to fining-upwards motifs. Sequence boundaries are marked by widespread, but shallow, incision, and the juxtaposition of stacked fluvial/tidal channel fills on a variety of subtidal and intertidal facies. Unconventional grain-size changes at sequence boundaries can occur where basin ward facies shifts are marked by juxtaposition of heterolithic-argillaceous intertidal/supratidal mudflat deposits on subtidal sandflat facies. The maintenance of macrotidal conditions through complete base-level cycles is interpreted as being due to the structural topography inherited from rifting, causing the whole sub-basin to behave as a structurally controlled embayment.

dc.publisherGeological Society of London
dc.subjectArgentina
dc.subjecttidal depositional systems
dc.subjectsedimentology
dc.subjectJurassic Lajas Formation
dc.titleSedimentology of the tide-dominated Jurassic Lajas Formation, Neuquen Basin, Argentina
dc.typeBook Chapter
dcterms.source.volume252
dcterms.source.startPage83
dcterms.source.endPage107
dcterms.source.titleThe Neuquen Basin, Argentina: A Case Study in Sequence Stratigraphy and Basin Dynamics (Geological Society, London, Special Publication Number 252)
dcterms.source.isbn1-86239-190-4
dcterms.source.placeBath, UK
dcterms.source.chapter16
curtin.accessStatusFulltext not available
curtin.facultyDepartment of Applied Geology
curtin.facultyFaculty of Science and Engineering
curtin.facultyWA School of Mines


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