Results 61 to 70 of about 11,926 (218)
Geophysical Research Letters, Volume 52, Issue 10, 28 May 2025.Abstract Oceanic Anoxic Event 2 (OAE2, ∼94 Ma) represents a major global cycle perturbation in the mid‐Cretaceous greenhouse that is commonly attributed to increased biological primary productivity stimulated by elevated nutrients. However, whether increased nutrients were sourced from submarine volcanism or enhanced continental weathering remains ...
Binchen Li +3 more
wiley +1 more source
The Depositional Record, Volume 11, Issue 2, Page 616-636, April 2025.While the Smithian–Spathian boundary carbon isotopic excursion has been traditionally interpreted as capturing global carbon cycle behaviour, recent studies have suggested that at least some Early Triassic carbon isotopic excursions may incorporate influences from authigenic or early diagenetic processes.
Jordan P. Todes +6 more
wiley +1 more source
Uppermost Jurassic to Lower Cretaceous benthic foraminiferal biostratigraphy at ODP Site 765 on the Argo Abyssal Plain. [PDF]
, 1992 Benthic foraminifers were studied in 99 samples collected from the lower 200 m of Hole 765C. The studied section ranges from the Tithonian to Aptian, and benthic foraminifers can be subdivided into five assemblages on the basis of faunal diversity and ...
Geroch, S. +2 more
core
Birth, life and death of the Pannonian Lake [PDF]
, 1990 The Miocene-Pliocene Pannonian Lake formed in an extensional basin system behind the compressional arc of the Carpathians. Its size and depth were comparable to those of the Caspian Sea.
Kázmér, Miklós
core +1 more source
Chapter 13 Chronostratigraphy: understanding rocks and time
, 2022 These online resources include a duplicate of Table 13.1 outlining the hierarchy of chronostratigraphical units, a tabulated version of Section 13.5.4 from the chapter that outlines the twelve key points for defining a GSSP and the flow chart for the process of defining and gaining approval for a GSSP.
Coe, Angela L +2 more
openaire +1 more source
The Depositional Record, Volume 11, Issue 2, Page 764-785, April 2025.With the aid of a chronologically well‐constrained stratigraphy, facies and sequence analyses were carried out on three drill‐cores obtained from estuarine macrotidal flats. The sequence analysis of the late Quaternary tidal deposits shows that four transgressions occurred in multi‐sequential order, whereas the intervening regressive phases were much ...
Serin Lim +4 more
wiley +1 more source
Учёные записки Казанского университета: Серия Естественные науки, 2018 The Mezino-Lapshinovka section is constituted by the Upper Cretaceous carbonate clayey siliceous succession. It has been studied by XRD, SEM, microprobe, and geochemical analyses in order to reconstruct the main geologic events that influenced the ...
S.O. Zorina +7 more
doaj
Geologica Acta, 2018 The Ediacaran-Lower Ordovician successions exposed in the Eastern Pyrenees are updated and revised based on recent U-Pb zircon radiometric ages, intertonguing relationships of carbonate-dominated strata, and onlapping patterns marking the top of volcano ...
M. Padel +3 more
doaj +1 more source
Plio-Pleistocene changes in water mass exchange and erosional inputs in the Fram Strait [PDF]
, 2011 We determined the isotopic composition of neodymium (Nd) and lead (Pb) of past seawater to reconstruct water mass exchange and erosional input between the Arctic Ocean and the Norwegian-Greenland Seas over the past 5 Ma.
Christl, Marcus +4 more
core
, 2011 The ancient and now abandoned settlement of Naga, had its heyday around 2000 years ago, located in the hinterland of a Nile tributary. Here we present 15 new OSL-dates and four new radiocarbon-ages.
Berking, Jonas, Schütt, Brigitta
core +1 more source