Show simple item record

dc.contributor.authorGrøsfjeld, Kari
dc.contributor.authorDybkjær, Karen
dc.contributor.authorEidvin, Tor
dc.contributor.authorRiis, Fridtjof
dc.contributor.authorRasmussen, Erik Skovbjerg
dc.contributor.authorKnies, Jochen
dc.date.accessioned2020-03-06T14:25:12Z
dc.date.available2020-03-06T14:25:12Z
dc.date.issued2019-12-10
dc.description.abstractSeven side-wall core samples from the lower part of the Molo Formation in exploration well 6610/3–1 off Vestfjorden/Lofoten have been reanalysed for marine palynomorphs. Description of new species from other studies and access to reference successions from nearby sites with an independent chronostratigraphy have enabled a more reliable depositional age constraint for the Molo Formation in its northern distribution area than previously achieved. The new data (e.g., the lowest occurrence of the dinoflagellate cysts Barssidinium graminosum and Barssidinium pliocenicum and the highest occurrence of the dinoflagellate cysts Minisphaeridium latirictum and Operculodinium piaseckii) provide incontrovertible evidence for a Miocene age for the Molo Formation in well 6610/3–1. Our data suggest that the Molo Formation in well 6610/3–1 started to accumulate after erosional activity which took place between the late middle Miocene and the late Miocene. The data (especially the presence of the dinoflagellate cyst A. andalouisiensis andalousiensis, the co-occurrence of the dinoflagellate cysts Barssidinium evangelineae and M. latirictum and the presence of the acritarch L. lucifer) suggest that the Molo Formation in well 6610/3–1 started to accumulate at around 8.8 / 8.7 Ma. The sediments were deposited in a warm temperate, high-energy environment influenced by river discharge. During deposition, older sediments, particularly from the Paleogene, became extensively eroded. The erosion and rapid accumulation were probably associated with the combined effects of eustatic sea-level fall and uplift/updoming of the hinterland/coastal zone.en_US
dc.identifier.citationGrøsfjeld K, Dybkjær K, Eidvin T, Riis F, Rasmussen ES, Knies J. A Miocene age for the Molo Formation, Norwegian Sea shelf off Vestfjorden, based on marine palynology . Norwegian Journal of Geology. 2019;99(3):1-25
dc.identifier.cristinIDFRIDAID 1799543
dc.identifier.doi10.17850/njg99-3-6
dc.identifier.issn2387-5844
dc.identifier.issn2387-5852
dc.identifier.urihttps://hdl.handle.net/10037/17654
dc.language.isoengen_US
dc.publisherNorwegian Journal of Geologyen_US
dc.relation.journalNorwegian Journal of Geology
dc.rights.holderCopyright 2019 The Author(s)en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450en_US
dc.titleA Miocene age for the Molo Formation, Norwegian Sea shelf off Vestfjorden, based on marine palynologyen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


File(s) in this item

Thumbnail

This item appears in the following collection(s)

Show simple item record