Depositional setting and early diagenesis of the dinosaur eggshell-bearing Aren Fm at Bastus, Late Campanian, south-central Pyrenees

Simple item page
dc.contributor.authorDíaz Molina, Margarita
dc.contributor.authorKälin, Otto
dc.contributor.authorBenito Moreno, María Isabel
dc.contributor.authorLópez Martínez, María Nieves
dc.contributor.authorVicens, Enric
dc.date.accessioned2023-06-20T09:50:47Z
dc.date.available2023-06-20T09:50:47Z
dc.date.issued2007-07-15
dc.description.abstractThe Late Cretaceous Aren Fm exposed north of Bastus in the Tremp Basin (south-central Pyrenees) preserves an excellent record of dinosaur eggs laid in a marine littoral setting. Different from other cases reported in literature, at the Bastus site the preferential nesting ground was original beach sand. The coastal deposits of Aren Fm can be grouped into four facies assemblages, representing respectively shoreface, beachface, beach ridge plain and backbarrier lagoon environments. Shoreface deposits include fine- to coarsegrained hybrid arenites and subordinate quartz-dominated conglomerates with ripple structures of wave and wave-current origin. Beachface deposits are mainly storm beach conglomerates, but parallel-laminated foreshore arenites locally occur. Backbarrier lagoon deposits comprise of washover sandy conglomerates that grade laterally into sandy lime mudstones, biomicrites and marls. Beach ridge sediment, wherein the bulk of dinosaur eggs and eggshell debris occurs, predominantly is a reddish hybrid arenite that has undergone a complex early diagenetic evolution, including marine and meteoric cementation followed by soil development. The reddish arenites overlie wave-dominated shoreface deposits and in places pass laterally into lagoonal deposits. They originally formed shore ridges, that became stabilized during progradational episodes by pedogenesis (beach ridge, sensu[Otvos, E.G., 2000. Beach ridges—definitions and significance. Geomorphology 32, 83–108.]), which also affected the dinosaur eggs. The eggshell-bearing beach ridge arenites are typically preserved at the top of parasequences forming the systems tracts of a third-order sequence. Thick packages of this facies resulted from aggradation of barrier/beach ridge deposits, whose preservation below surfaces of transgressive erosion was favoured by incipient lithification.
dc.description.departmentDepto. de Geodinámica, Estratigrafía y Paleontología
dc.description.facultyFac. de Ciencias Geológicas
dc.description.refereedTRUE
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/9966
dc.identifier.doi10.1016/j.sedgeo.2007.02.002
dc.identifier.issn0037-0738
dc.identifier.officialurlhttp://www.elsevier.com/wps/find/journaldescription.cws_home/503361/description#description
dc.identifier.urihttps://hdl.handle.net/20.500.14352/50446
dc.issue.number3-4
dc.journal.titleSedimentary geology
dc.language.isoeng
dc.page.final221
dc.page.initial205
dc.publisherElsevier
dc.rights.accessRightsopen access
dc.subject.cdu56:574
dc.subject.cdu568.19(234.12)
dc.subject.keywordPaleoenvironments
dc.subject.keywordBeach ridges
dc.subject.keywordDinosaur eggs
dc.subject.keywordDiagenesis
dc.subject.keywordCretaceous
dc.subject.ucmPaleontología
dc.subject.unesco2416 Paleontología
dc.titleDepositional setting and early diagenesis of the dinosaur eggshell-bearing Aren Fm at Bastus, Late Campanian, south-central Pyrenees
dc.typejournal article
dc.volume.number199
dspace.entity.typePublication
relation.isAuthorOfPublication392085e6-74a9-4d8a-803a-7a9afd572f98
relation.isAuthorOfPublication2a461379-a8c0-4f39-871f-1e7dd971dd38
relation.isAuthorOfPublicationf96742fd-27a4-411f-a65b-3e9b39ddd084
relation.isAuthorOfPublication.latestForDiscovery392085e6-74a9-4d8a-803a-7a9afd572f98
Download
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
BastusSedGeol.pdf
Size:
3.62 MB
Format:
Adobe Portable Document Format
downoload Download
Collections
Artículos