Miquel Poyatos More

• van Yperen, Anna Elisabeth; Poyatos More, Miquel; Holbrook, John M. & Midtkandal, Ivar (2020). Internal mouth‐bar variability and preservation of subordinate coastal processes in low‐accommodation proximal deltaic settings (Cretaceous Dakota Group, New Mexico, USA). The Depositional Record.  ISSN 2055-4877. . doi: 10.1002/dep2.100
• Boulesteix, Kevin; Poyatos More, Miquel; Flint, Stephen S.; Taylor, Kevin G; Hodgson, David M. & Hasiotis, Stephen T (2019). Transport and deposition of mud in deep-water environments: Processes and stratigraphic implications. Sedimentology.  ISSN 0037-0746.  66, s 2894- 2925 . doi: 10.1111/sed.12614
• Klausen, Tore Grane; Müller, Reidar; Poyatos More, Miquel; Olaussen, Snorre & Stueland, Eirik (2019). Tectonic, provenance and sedimentological controls on reservoir characteristics in the Upper Triassic–Middle Jurassic Realgrunnen Subgroup, SW Barents Sea. Geological Society Special Publication.  ISSN 0305-8719.  495 . doi: 10.1144/SP495-2018-165
• Poyatos More, Miquel; Jones, George D.D.; Brunt, Rufus L; Tek, Daniel E.; Hodgson, David M. & Flint, Stephen S. (2019). Clinoform architecture and along-strike facies variability through an exhumed erosional to accretionary basin margin transition. Basin Research.  ISSN 0950-091X.  31(5), s 920- 947 . doi: 10.1111/bre.12351
• van Yperen, Anna Elisabeth; Holbrook, John M.; Poyatos More, Miquel & Midtkandal, Ivar (2019). Coalesced delta-front sheet-like sandstone bodies from highly avulsive distributary channels: the low-accommodation Mesa Rica Sandstone (Dakota Group, New Mexico, USA). Journal of Sedimentary Research.  ISSN 1527-1404.  89(7), s 654- 678 . doi: 10.2110/jsr.2019.27
• Zuchuat, Valentin; Midtkandal, Ivar; Poyatos More, Miquel; Da Costa, Sigrid; Brooks, Hannah Louise; Halvorsen, Kristine; Cote, Nathan; Sundal, Anja & Braathen, Alvar (2019). Composite and diachronous stratigraphic surfaces in low-gradient, transitional settings: The J-3 “unconformity” and the Curtis Formation, east-central Utah, U.S.A.. Journal of Sedimentary Research.  ISSN 1527-1404.  89(11), s 1075- 1095 . doi: 10.2110/jsr.2019.56 Vis sammendrag

  Unconformities, by definition, correspond to erosional or nondepositional surfaces, which separate older strata below, from younger rocks above, encapsulating significant time gaps. However, recent studies have highlighted the composite nature of some unconformities, as well as their heterochronous and diachronous character, which challenge the use of such a definition in a four-dimensional dynamic environment. The J-3 Unconformity, separating the Middle Jurassic Entrada Sandstone from the Upper Jurassic Curtis Formation (and laterally equivalent units) in east-central Utah (USA), is laterally variable, generated by either erosion-related processes such as eolian deflation, and water-induced erosion, or by deformational processes. The J-3 Unconformity is a composite surface, formed by numerous processes that interacted and overlapped spatially and temporally. This study therefore demonstrates the heterochronous, diachronous, and non-unique nature of this surface interpreted as unconformity, where one process can be represented by varying expressions in the stratigraphic record, and conversely many processes may result in the same stratigraphic expression.

• Bell, Daniel; Stevenson, Christopher J; Kane, Ian A.; Hodgson, David M. & Poyatos More, Miquel (2018). Topographic controls on the development of contemporaneous but contrasting basin-floor depositional architectures. Journal of Sedimentary Research.  ISSN 1527-1404.  88(10), s 1166- 1189 . doi: 10.2110/jsr.2018.58 Fulltekst i vitenarkiv.
• Brooks, Hannah L; Hodgson, David M.; Brunt, Rufus L; Peakall, Jeff; Poyatos More, Miquel & Flint, Stephen (2018). Disconnected submarine lobes as a record of stepped slope evolution over multiple sea-level cycles. Geosphere.  ISSN 1553-040X.  14(4), s 1753- 1779 . doi: 10.1130/GES01618.1
• Chanvry, Emmanuelle; Deschamps, Rémy; Joseph, Philippe; Puigdefabregas, Cai; Poyatos More, Miquel; Serra-Kiel, Josep; Garcia, Daniel & Teinturier, Stéphane (2018). The influence of intrabasinal tectonics in the stratigraphic evolution of piggyback basin fills: Towards a model from the Tremp-Graus-Ainsa Basin (South-Pyrenean Zone, Spain). Sedimentary Geology.  ISSN 0037-0738.  377, s 34- 62 . doi: 10.1016/j.sedgeo.2018.09.007 Fulltekst i vitenarkiv.
• Cosgrove, Grace IE; Hodgson, David M.; Poyatos More, Miquel; Mountney, Nigel P & McCaffrey, William D (2018). Filter Or Conveyor? Establishing Relationships Between Clinoform Rollover Trajectory, Sedimentary Process Regime, and Grain Character Within Intrashelf Clinothems, Offshore New Jersey, U.S.A. Journal of Sedimentary Research.  ISSN 1527-1404.  88(8), s 917- 941 . doi: 10.2110/jsr.2018.44
• Gomis-Cartesio, Luz E; Poyatos More, Miquel; Hodgson, David M. & Flint, Stephen (2018). Shelf-margin clinothem progradation, degradation and readjustment: Tanqua depocentre, Karoo Basin (South Africa). Sedimentology.  ISSN 0037-0746.  65(3), s 809- 841 . doi: 10.1111/sed.12406
• Femenias-Gual, Joan; Minwer-Barakat, Raef; Marigo, Judit; Poyatos More, Miquel & Moya-Sola, Salvador (2017). Agerinia marandati sp. nov., a new early Eocene primate from the Iberian Peninsula, sheds new light on the evolution of the genus Agerinia. PeerJ.  ISSN 2167-8359. . doi: 10.7717/peerj.3239 Fulltekst i vitenarkiv.
• Hodgson, David M.; Browning, James V.; Miller, Kenneth G.; Hesselbo, Stephen P.; Poyatos More, Miquel; Mountain, Gregory S. & Proust, Jean Noël (2017). Sedimentology, stratigraphic context, and implications of Miocene intrashelf bottomset deposits, offshore New Jersey. Geosphere.  ISSN 1553-040X.  14(1), s 95- 114 . doi: 10.1130/GES01530.1
• Poyatos More, Miquel (2016). Mudstone-dominated basin margin progradation: processes and implications.. Journal of Sedimentary Research.  ISSN 1527-1404.  86, s 863- 878 . doi: 10.2110/jsr.2016.57

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• Zuchuat, Valentin; Midtkandal, Ivar; Poyatos More, Miquel; Da Costa, Sigrid; Brooks, Hannah L; Halvorsen, Kristine; Sundal, Anja; Cote, Nathan & Braathen, Alvar (2020). Brexit, Megxit, and the J-3 Unconformitexit: how they all lost it.. Vis sammendrag

  Unconformities, by definition, correspond to non-depositional or erosive surfaces, separating older strata below, from younger rocks above, and encapsulating significant time gaps. However, recent studies have emphasized the composite nature of some unconformities, as well as their heterochronous and diachronous character, which restricts the use of such a definition to a near one-dimensional setting. This study analyses the nature of the J-3 Unconformity, which separates the Middle Jurassic Entrada Sandstone from the Late Jurassic Curtis Formation (and laterally equivalent units) in east-central Utah (USA). Our detailed mapping and characterization indicates the J-3 “Unconformity” is in fact a composite surface generated by either erosion-related processes such as eolian deflation, and water-induced erosion, or by deformational processes. These multiple mechanisms interacted and overlapped in time and space, which demonstrates the composite and diachronous and non-unique nature of such boundaries. This contact has been historically interpreted as an unconformity, but our results show that this key stratigraphic surface is a time-transgressive flooding-ravinement surface that formed shortly before and during a series of transgressions that flooded the area during the Late Jurassic. Consequently, the regionally extensive, composite, heterochronous, and diachronous J-3 Unconformity does not fit the classic unconformity definition, after which an unconformity universally separates older from younger strata basin-wide. The J3 “Unconformity” case study highlights the fact that one process can be represented by varying expressions in the stratigraphic record, and conversely many processes may result in the same stratigraphic expression. Consequently a revised definition of unconformity is discussed, focusing on processes and associated environmental changes, while abandoning its time-barrier aspect. This investigation also exemplifies some of the implications on subsurface analyses that the inaccurate characterization of the subseismic complex characters of such major stratigraphic bounding surfaces can have. These inaccuracies may lead to imprecise timing and sediment budget predictions, and ultimately have strong implications for basin evolution and reservoir models. Key words: Unconformity, transitional basin, composite surface, ravinement, time-transgressive

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