Results 91 to 100 of about 3,717 (209)

Phanerozoic Chronostratigraphy: Top-Down Instead of Bottom-Up Boundary Definitions

, 2019
The GSSP method defines stage bases, and, where proximate, equates them to the bases of larger chronostratigraphic units. The Phanerozoic and its subdivisions above the stage level thus are only successively larger “pigeonholes” within which to bin ...
Spencer G. Lucas
core   +1 more source

Uppermost Albian biostratigraphy and chronostratigraphy

Carnets de Géologie, 2009
The Albian Stage is the highest chronostratigraphic unit of the Lower Cretaceous Series and underlies the Cenomanian Stage of the Upper Cretaceous Series.
Scott Robert W.
doaj  

Constraining shifts in North Atlantic plate motions during the Palaeocene by U-Pb dating of Svalbard tephra layers

Scientific Reports, 2017
Radioisotopic dating of volcanic minerals is a powerful method for establishing absolute time constraints in sedimentary basins, which improves our understanding of the chronostratigraphy and evolution of basin processes.
Morgan T. Jones, Lars E. Augland, Grace E. Shephard, Seth D. Burgess, Gauti T. Eliassen, Malte M. Jochmann, Bjarki Friis, Dougal A. Jerram, Sverre Planke, Henrik H. Svensen   +9 more
doaj   +1 more source

Usolka section (southern Urals, Russia): a potential candidate for GSSP to define the base of the Gzhelian Stage in the global chronostratigraphic scale

Geologija, 2006
Conodont species Streptognathodus simulator Ellison, 1941 has been proposed recently to define the Kasimovian-Gzhelian boundary in the global chronostratigraphic scale.The species distributed globally and traditionally has been used as a marker of the ...
Valery V. Chernykh, Boris I. Chuashov, Vladimir I. Davydov, Mark Schmitz, walter S. Snyder   +4 more
doaj  

Chronostratigraphy and tectono‐sedimentary history of the Eastern South Pyrenean foreland basin (Ripoll Syncline, North‐East Spain)

The Depositional Record
This paper contributes to an understanding of the tectono‐sedimentary evolution of the South Pyrenean foreland system by reviewing the chronostratigraphic framework of the basin infill in its eastern sector. Six sections are analysed and cross‐correlated
Philémon Juvany, Miguel Garcés, Miguel Lopez‐Blanco, Carles Martín Closas, Elisabet Beamud Amorós, Josep Tosquella, Susanna Emilia Bekkevold   +6 more
doaj   +1 more source

Late Holocene Abrupt Changes in the Fluvial Dynamics of the Tiber Valley Catchment (Rome, Italy): An Impact of the 4.2 Event?

Quaternary
In the present work, we investigate the post-glacial aggradation of three tributary valleys draining the left hydrographic basin of the Tiber River in central Rome: the Murcia, Caffarella, and Grottaperfetta valleys.
Fabrizio Marra, Carlo Rosa, Fabio Florindo   +2 more
doaj   +1 more source

Contemporary research tasks and challenges for Quaternary Sciences

Geographia Polonica
The article briefly characterises the Quaternary, defines the criteria for its identification within the stratigraphic table and discusses the principles of its internal division.
Zdzisław Jary, Mirosław Błaszkiewicz
doaj   +1 more source

Chronostratigraphy of sediment cores from Lake Selina, southeastern Australia: Radiocarbon, optically stimulated luminescence, paleomagnetism, authigenic beryllium isotopes and elemental data. [PDF]

Data Brief, 2022
Lisé-Pronovost A, Fletcher MS, Simon Q, Jacobs Z, Gadd PS, Herries AIR, Yokoyama Y, Aster team.   +7 more
europepmc   +1 more source

Towards an improved Arctic Ocean chronostratigraphy

, 2004
Concrete planning continues for launching the IODP Arctic Ocean expedition in summer 2004. The two major objectives are (1) to understand the long-term (50 Ma) and short-term (Neogene) paleoceanographic history and (2) the tectonic evolution of the ...
Knies, J., Matthießen, Jens, Vogt, C., Mackensen, Andreas, Nam, S.   +4 more
core   +2 more sources

Reassessing the chronostratigraphy and tempo of climate change in the Lower-Middle Permian of the southern Sydney Basin, Australia: Integrating evidence from U–Pb zircon geochronology and biostratigraphy

, 2022
Reassessing the chronostratigraphy and tempo of climate change in the Lower-Middle Permian of the southern Sydney Basin, Australia: Integrating evidence from U–Pb zircon geochronology and ...
Guang Shi (13071915), S Lee (2618095), AP Nutman (15900077), BG Jones (15777467), GR Bann (15900080)   +4 more
core