Biostratigraphy and depositional anatomy of a large olistostrome in the Eocene Hieroglyphic Formation of the Silesian Nappe, Polish Outer Carpathians

2014
journal article
article
dc.abstract.enThe study focuses on a large olistostrome unit (~200 m thick and 4 km in strike-parallel extent) embedded in the Mid-Eocene shaly Hieroglyphic Formation of the Silesian Nappe, exposed in the Rożnów Lake area. Foraminifer biostratigraphy and petrographic comparisons are used to identify the provenance of olistoliths. The olistostrome is tripartite with respect of its olistolith composition. The lower part of the olistostrome abounds in olistoliths of sandstones derived from the Early Eocene turbiditic Ciężkowice Formation, whereas the middle part is dominated by olistoliths of Early Eocene bathyal mudshales. The upper part contains olistoliths of Middle Eocene turbiditic “banded sandstones”, known from the Hieroglyphic Formation and deposited in the bathyal zone above the CCD. The bathyal provenance of the olistostrome contrasts with the abyssal origin of the hosting green shales. The olistostrome unit is inferred to be composite, emplaced in the earliest Bartonian or at the Lutetian/ Bartonian transition by a series of at least three large debris flows that closely followed one another. Biostratigra- phical data and slump-fold vergence suggest resedimentation from the bathyal northern slope of the Silesian Cordillera that bounded the abyssal Silesian Basin to the south. Northward movement of the thrust-formed cordillera must have warped up the base-of-slope deposits of the Ciężkowice Formation, causing their gravita- tional collapse. This event destabilized the former lower-slope muddy deposits, resulting in a second phase of resedimentation by retrogressive slumping, which led to the collapse of mid-slope sandy turbidites. The slope failures involved contemporaneous Mid-Eocene sediment with an admixture of foraminifers derived from the upper slope or shelf margin and with exotic bedrock debris shed from the eroded cordillera crest. The catastrophic multi-phase emplacement of the olistostrome marked the last major thrusting pulse of the second (Late Cretaceous–Late Eocene) stage of tectonic evolution of the Outer Carpathian accretionary prism.pl
dc.affiliationWydział Biologii i Nauk o Ziemi : Instytut Nauk Geologicznychpl
dc.contributor.authorWaśkowska, Annapl
dc.contributor.authorCieszkowski, Marek - 127581 pl
dc.date.accession2015-03-11pl
dc.date.accession2020-01-02pl
dc.date.accessioned2015-03-25T07:57:24Z
dc.date.available2015-03-25T07:57:24Z
dc.date.issued2014pl
dc.date.openaccess0
dc.description.accesstimew momencie opublikowania
dc.description.number1pl
dc.description.physical51-70pl
dc.description.versionostateczna wersja wydawcy
dc.description.volume84pl
dc.identifier.eissn2300-8512pl
dc.identifier.issn0208-9068pl
dc.identifier.projectROD UJ / Ppl
dc.identifier.urihttp://ruj.uj.edu.pl/xmlui/handle/item/4147
dc.identifier.weblinkhttp://www.asgp.pl/84_1_051_070pl
dc.identifier.weblinkhttps://geojournals.pgi.gov.pl/asgp/article/view/16463pl
dc.languageengpl
dc.language.containerengpl
dc.rightsUdzielam licencji. Uznanie autorstwa - Użycie niekomercyjne - Na tych samych warunkach 4.0 Międzynarodowa*
dc.rights.licenceOTHER
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/legalcode.pl*
dc.share.typeotwarte czasopismo
dc.subject.enolistostromepl
dc.subject.enolistolithspl
dc.subject.enforaminiferspl
dc.subject.enflyschpl
dc.subject.enEocenepl
dc.subject.enOuter Carpathianspl
dc.subtypeArticlepl
dc.titleBiostratigraphy and depositional anatomy of a large olistostrome in the Eocene Hieroglyphic Formation of the Silesian Nappe, Polish Outer Carpathianspl
dc.title.journalAnnales Societatis Geologorum Poloniaepl
dc.typeJournalArticlepl
dspace.entity.typePublication
dc.abstract.enpl
The study focuses on a large olistostrome unit (~200 m thick and 4 km in strike-parallel extent) embedded in the Mid-Eocene shaly Hieroglyphic Formation of the Silesian Nappe, exposed in the Rożnów Lake area. Foraminifer biostratigraphy and petrographic comparisons are used to identify the provenance of olistoliths. The olistostrome is tripartite with respect of its olistolith composition. The lower part of the olistostrome abounds in olistoliths of sandstones derived from the Early Eocene turbiditic Ciężkowice Formation, whereas the middle part is dominated by olistoliths of Early Eocene bathyal mudshales. The upper part contains olistoliths of Middle Eocene turbiditic “banded sandstones”, known from the Hieroglyphic Formation and deposited in the bathyal zone above the CCD. The bathyal provenance of the olistostrome contrasts with the abyssal origin of the hosting green shales. The olistostrome unit is inferred to be composite, emplaced in the earliest Bartonian or at the Lutetian/ Bartonian transition by a series of at least three large debris flows that closely followed one another. Biostratigra- phical data and slump-fold vergence suggest resedimentation from the bathyal northern slope of the Silesian Cordillera that bounded the abyssal Silesian Basin to the south. Northward movement of the thrust-formed cordillera must have warped up the base-of-slope deposits of the Ciężkowice Formation, causing their gravita- tional collapse. This event destabilized the former lower-slope muddy deposits, resulting in a second phase of resedimentation by retrogressive slumping, which led to the collapse of mid-slope sandy turbidites. The slope failures involved contemporaneous Mid-Eocene sediment with an admixture of foraminifers derived from the upper slope or shelf margin and with exotic bedrock debris shed from the eroded cordillera crest. The catastrophic multi-phase emplacement of the olistostrome marked the last major thrusting pulse of the second (Late Cretaceous–Late Eocene) stage of tectonic evolution of the Outer Carpathian accretionary prism.
dc.affiliationpl
Wydział Biologii i Nauk o Ziemi : Instytut Nauk Geologicznych
dc.contributor.authorpl
Waśkowska, Anna
dc.contributor.authorpl
Cieszkowski, Marek - 127581
dc.date.accessionpl
2015-03-11
dc.date.accessionpl
2020-01-02
dc.date.accessioned
2015-03-25T07:57:24Z
dc.date.available
2015-03-25T07:57:24Z
dc.date.issuedpl
2014
dc.date.openaccess
0
dc.description.accesstime
w momencie opublikowania
dc.description.numberpl
1
dc.description.physicalpl
51-70
dc.description.version
ostateczna wersja wydawcy
dc.description.volumepl
84
dc.identifier.eissnpl
2300-8512
dc.identifier.issnpl
0208-9068
dc.identifier.projectpl
ROD UJ / P
dc.identifier.uri
http://ruj.uj.edu.pl/xmlui/handle/item/4147
dc.identifier.weblinkpl
http://www.asgp.pl/84_1_051_070
dc.identifier.weblinkpl
https://geojournals.pgi.gov.pl/asgp/article/view/16463
dc.languagepl
eng
dc.language.containerpl
eng
dc.rights*
Udzielam licencji. Uznanie autorstwa - Użycie niekomercyjne - Na tych samych warunkach 4.0 Międzynarodowa
dc.rights.licence
OTHER
dc.rights.uri*
http://creativecommons.org/licenses/by-nc-sa/4.0/legalcode.pl
dc.share.type
otwarte czasopismo
dc.subject.enpl
olistostrome
dc.subject.enpl
olistoliths
dc.subject.enpl
foraminifers
dc.subject.enpl
flysch
dc.subject.enpl
Eocene
dc.subject.enpl
Outer Carpathians
dc.subtypepl
Article
dc.titlepl
Biostratigraphy and depositional anatomy of a large olistostrome in the Eocene Hieroglyphic Formation of the Silesian Nappe, Polish Outer Carpathians
dc.title.journalpl
Annales Societatis Geologorum Poloniae
dc.typepl
JournalArticle
dspace.entity.type
Publication
Affiliations

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