Results 21 to 30 of about 3,284 (255)

The different approaches in seismic stratigraphy interpretation [PDF]

open access: yesTehnika, 2018
This paper presents two basic approaches in seismic stratigraphy interpretation. The first one as starting point have seismic sections, whose interpretation in the later stage correlates with well data.
Radivojević Dejan N.
doaj  

The History of the Aptian Stage Stratigraphy and Ammonoids of the Central Part of the Northern Caucasus Studies. Paper 1. 19th Century to 1969 [PDF]

open access: yesИзвестия Саратовского университета. Новая серия: Серия Науки о Земле
The offering paper covers the history of the Aptian stage stratigraphy and ammonites studies of the central part of the Northern Caucasus, which was subdivided by the author into five stages. The first (mid-to-late 19th century), second (1901–1951)
Polkovoi, Kirill Sergeevich
doaj   +1 more source

The GSSP Method of Chronostratigraphy: A Critical Review

open access: yesFrontiers in Earth Science, 2018
The use of boundary stratotypes to define chronostratigraphic units began in the 1960s, and, in the 1980s, these were called Global Stratotype Sections and Points (GSSPs). Approximately two-thirds of the GSSPs of the bases of the Phanerozoic stage (71 of
Spencer G. Lucas
doaj   +1 more source

The Palaeolithic sequence of the Arma dell’Aquila (Finale Ligure, Savona, North-western Italy)

open access: yesMateriale și Cercetări Arheologice, 2021
The excavations carried out in the rock-shelter of Arma dell’Aquila by C. Richard in 1938 and 1940 led to the discovery of a thick stratigraphy, the lowermost deposit of which yielded evidence of different periods of Upper Palaeolithic occupation.
Biagi, P., Starnini, E.
doaj   +1 more source

Stratigraphy of Aptian and Albian Stages in the central part of Moesian Platform

open access: yesGeologica Balcanica, 1990
Aptian Stage is widespread in the Central North Bulgaria, while the Albian is established only in the northern regions. The Aptian sections are built up of sediments of the Trambes and Svištov Formations. It has been established that the Trâmbeš and Svištov Formation join laterally along the line Svištov-Tatari-Osilm.
Marin Ivanov, Kristalina Stoykova
openaire   +1 more source

A cold laboratory hyperspectral imaging system to map grain size and ice layer distributions in firn cores [PDF]

open access: yesThe Cryosphere
The Greenland and Antarctic ice sheets are covered in a layer of porous firn. Knowledge of firn structure improves our understanding of ice sheet mass balance, supra- and englacial hydrology, and ice core paleoclimate records.
I. E. McDowell   +7 more
doaj   +1 more source

On the Geological Age of the Sundyr Faunal Assemblage of Permian Tetrapods from the East European Platform [PDF]

open access: yesУчёные записки Казанского университета: Серия Естественные науки, 2015
A new Sundyr faunal assemblage of Permian tetrapods was discovered in Eastern Europe. It includes dinocephalians Titanosuchia fam. indet., tapinocephalians aff. Ulemosauridae, anomodontians aff.
Golubev V.K., Kurkin A.A., Sennikov A.G.
doaj  

THE TYRRHENIAN SECTION OF SAN GIOVANNI DI SINIS (SARDINIA):STRATIGRAPHIC RECORD OF AN IRREGULAR SINGLE HIGH STAND

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2007
A new analysis of the most representative Upper Pleistocene (Tyrrhenian, MIS 5e) section of San Giovanni di Sinis (Oristano, Sardinia) has provided a more detailed genetic stratigraphy of a low wave energy beach and temperate lagoon up to emerged peri ...
LUCIANO LECCA, SALVATORE CARBONI
doaj   +1 more source

Astronomical calibration of the Toarcian Stage: Implications for sequence stratigraphy and duration of the early Toarcian OAE [PDF]

open access: yesEarth and Planetary Science Letters, 2014
The Toarcian Oceanic Anoxic Event (T-OAE) of the early Jurassic period involves one of the largest perturbations of the carbon cycle in the past 250 Ma, recorded by a pronounced negative carbon-isotope excursion (CIE). Numerous studies have focused on potential causes of the T-OAE and CIE, but are hampered by an uncertain timescale.
Boulila, Slah   +6 more
openaire   +2 more sources

Carbon isotope composition and its evolution around the base of the Drumian Stage in Linzhou area, northern Henan

open access: yes地质科技通报, 2022
Carbon isotope stratigraphy is an important means to subdivide and correlate the Cambrian strata. Based on the carbon isotope analysis of the carbonate strata of Lütuogou Section, northern Henan Province, it is found the δ13C value of carbonate samples ...
Yonglin Chen   +5 more
doaj   +1 more source

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