Integrated stratigraphy and facies development of the lower Danubian Cretaceous Group (Bavaria, SE-Germany): dissecting Cenomanian-middle Turonian onlap patterns onto the Bohemian Massif

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F25%3A10169608" target="_blank" >RIV/00025798:_____/25:10169608 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1127/zdgg/2025/0473" target="_blank" >https://doi.org/10.1127/zdgg/2025/0473</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1127/zdgg/2025/0473" target="_blank" >10.1127/zdgg/2025/0473</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Integrated stratigraphy and facies development of the lower Danubian Cretaceous Group (Bavaria, SE-Germany): dissecting Cenomanian-middle Turonian onlap patterns onto the Bohemian Massif

Popis výsledku v původním jazyce

The deposits of the lower Danubian Cretaceous Group (DCG; Bavaria, SE-Germany) record one of the most pronounced sea-level rises in the Phanerozoic. Detailed bio- and sequence stratigraphic correlations and facies analyses of the lower Cenomanian-middle Turonian strata of the DCG based on two newly cored boreholes from the north of Regensburg and the revised Grub section in the Bodenwohrer Senke provide new insights into the depositional processes related to the early Late Cretaceous transgression. Unconformably overlying Upper Jurassic limestones or Carboniferous granites of the Variscan basement (Carboniferous granites), the Cretaceous succession includes the Regensburg (lower Cenomanian- lowermost Turonian), Eibrunn (uppermost Cenomanian-lowermost Turonian), Winzerberg (lower Turonian) and the lower (middle Turonian) parts of the Kagerhoh and Roding formations. All lithofacies are of marine origin, consisting of a variable mixture of siliciclastic material derived from the Bohemian Massif, carbonate produced by marine biota and authigenic glaucony. Five Cenomanian-Turonian unconformities (sequence boundaries SB Ce 3-5, SB Tu 1 and 2) and their corresponding depositional sequences (DS Ce 3-5, DS Ce-Tu 1, DS Tu 2, and the lower part of DS Tu 3) have been identified, the latter generally consisting of transgressive and highstand system tracts only. The sequence boundaries are reflected by conspicuous grain size/lithological shifts, reworking of older strata and/or stratigraphic gaps, and their correlative nature on an intra-basinal scale and beyond suggests an eustatic control on their formation. The detailed correlation clearly demonstrates the diachronous onlap of the DCG onto the Bohemian Massif and the time-transgressive nature of the Regensburg and Eibrunn formations. Facies patterns and thickness changes were exclusively controlled by sea-level fluctuations and available accommodation space until the early middle Turonian. This paper adds novel perspectives on the early Late Cretaceous depositional history of the Danubian Cretaceous Basin and highlights the importance of careful integrated stratigraphic correlation for the reconstruction of complex facies patterns and ancient relative sea-level changes.

Název v anglickém jazyce

Integrated stratigraphy and facies development of the lower Danubian Cretaceous Group (Bavaria, SE-Germany): dissecting Cenomanian-middle Turonian onlap patterns onto the Bohemian Massif

Popis výsledku anglicky

The deposits of the lower Danubian Cretaceous Group (DCG; Bavaria, SE-Germany) record one of the most pronounced sea-level rises in the Phanerozoic. Detailed bio- and sequence stratigraphic correlations and facies analyses of the lower Cenomanian-middle Turonian strata of the DCG based on two newly cored boreholes from the north of Regensburg and the revised Grub section in the Bodenwohrer Senke provide new insights into the depositional processes related to the early Late Cretaceous transgression. Unconformably overlying Upper Jurassic limestones or Carboniferous granites of the Variscan basement (Carboniferous granites), the Cretaceous succession includes the Regensburg (lower Cenomanian- lowermost Turonian), Eibrunn (uppermost Cenomanian-lowermost Turonian), Winzerberg (lower Turonian) and the lower (middle Turonian) parts of the Kagerhoh and Roding formations. All lithofacies are of marine origin, consisting of a variable mixture of siliciclastic material derived from the Bohemian Massif, carbonate produced by marine biota and authigenic glaucony. Five Cenomanian-Turonian unconformities (sequence boundaries SB Ce 3-5, SB Tu 1 and 2) and their corresponding depositional sequences (DS Ce 3-5, DS Ce-Tu 1, DS Tu 2, and the lower part of DS Tu 3) have been identified, the latter generally consisting of transgressive and highstand system tracts only. The sequence boundaries are reflected by conspicuous grain size/lithological shifts, reworking of older strata and/or stratigraphic gaps, and their correlative nature on an intra-basinal scale and beyond suggests an eustatic control on their formation. The detailed correlation clearly demonstrates the diachronous onlap of the DCG onto the Bohemian Massif and the time-transgressive nature of the Regensburg and Eibrunn formations. Facies patterns and thickness changes were exclusively controlled by sea-level fluctuations and available accommodation space until the early middle Turonian. This paper adds novel perspectives on the early Late Cretaceous depositional history of the Danubian Cretaceous Basin and highlights the importance of careful integrated stratigraphic correlation for the reconstruction of complex facies patterns and ancient relative sea-level changes.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

—

Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Zeitschrift der Deutschen Gesellschaft für Geowissenschaften

ISSN

1860-1804

e-ISSN

1861-4094

Svazek periodika

176

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

28

Strana od-do

nestránkováno

Kód UT WoS článku

001445835100001

EID výsledku v databázi Scopus

2-s2.0-105006898421