Trans-Atlantic correlation of Late Cretaceous high-frequency sea-level cycles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F22%3A00556289" target="_blank" >RIV/67985530:_____/22:00556289 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00025798:_____/22:00000049 RIV/00216208:11310/22:10440995

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0012821X21005793" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0012821X21005793</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.epsl.2021.117323" target="_blank" >10.1016/j.epsl.2021.117323</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Trans-Atlantic correlation of Late Cretaceous high-frequency sea-level cycles

Popis výsledku v původním jazyce

Previous studies of Cretaceous sedimentary rocks have used multi-proxy correlation methods to suggest eustatic change, modulated by the c. 400 kyr long eccentricity rhythm. Although numerous authors have inferred eustatic changes on shorter timescales, none have demonstrated synchronous sea-level changes in separate basins on different plates, thousands of kilometres apart. Our study integrates basin-scale, three-dimensional sequence architecture, molluscan biostratigraphy, and carbon-isotope chemostratigraphy to demonstrate synchronous sea-level changes in upper Turonian to lower Coniacian shallow-marine clastic successions in the Western Canada Foreland Basin, and the Bohemian Cretaceous Basin. Depositional sequences in both basins are plotted in a common time domain using an astronomically calibrated age model, allowing direct comparison. In both basins, at least seven major transgressive events can be shown to be synchronous within the limits of combined biostratigraphic and chemostratigraphic resolution. 'Major' and 'minor' sequences of late Turonian age appear to have been paced, respectively, by the long (c. 400 kyr) and short (c. 100 kyr) eccentricity cycles. In contrast, early Coniacian sequences evidence pacing by the c. 38 kyr obliquity rhythm. Stratal architecture suggests that sequences developed in response to eustatic changes of c. 14-20 m at average rates ranging 0.08 to >1.3 m/kyr. At a time of 'warm greenhouse' climate, sea-level change of this magnitude and timescale may not be explicable entirely as a result of thermal- and aquifer-eustasy, and hence glacio-eustasy may also have been a contributing factor.

Název v anglickém jazyce

Trans-Atlantic correlation of Late Cretaceous high-frequency sea-level cycles

Popis výsledku anglicky

Previous studies of Cretaceous sedimentary rocks have used multi-proxy correlation methods to suggest eustatic change, modulated by the c. 400 kyr long eccentricity rhythm. Although numerous authors have inferred eustatic changes on shorter timescales, none have demonstrated synchronous sea-level changes in separate basins on different plates, thousands of kilometres apart. Our study integrates basin-scale, three-dimensional sequence architecture, molluscan biostratigraphy, and carbon-isotope chemostratigraphy to demonstrate synchronous sea-level changes in upper Turonian to lower Coniacian shallow-marine clastic successions in the Western Canada Foreland Basin, and the Bohemian Cretaceous Basin. Depositional sequences in both basins are plotted in a common time domain using an astronomically calibrated age model, allowing direct comparison. In both basins, at least seven major transgressive events can be shown to be synchronous within the limits of combined biostratigraphic and chemostratigraphic resolution. 'Major' and 'minor' sequences of late Turonian age appear to have been paced, respectively, by the long (c. 400 kyr) and short (c. 100 kyr) eccentricity cycles. In contrast, early Coniacian sequences evidence pacing by the c. 38 kyr obliquity rhythm. Stratal architecture suggests that sequences developed in response to eustatic changes of c. 14-20 m at average rates ranging 0.08 to >1.3 m/kyr. At a time of 'warm greenhouse' climate, sea-level change of this magnitude and timescale may not be explicable entirely as a result of thermal- and aquifer-eustasy, and hence glacio-eustasy may also have been a contributing factor.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/GA17-10982S" target="_blank" >GA17-10982S: Globální cyklus uhlíku a změny hladiny oceánu ve skleníkovém klimatu: trans-atlantická korelace sedimentárních archivů turonu (křída)</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Earth and Planetary Science Letters

ISSN

0012-821X

e-ISSN

1385-013X

Svazek periodika

578

Číslo periodika v rámci svazku

January

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

117323

Kód UT WoS článku

000837878700008

EID výsledku v databázi Scopus

2-s2.0-85120644617