Results 11 to 20 of about 3,017 (160)

Cladistics and Stratigraphy

open access: yesGeosciences, 2023
Using cladistic phylogenies (cladograms) to evaluate stratigraphy (taxon distributions and correlations) necessitates various assumptions that include all of the assumptions built into the cladogram, assuming the cladogram is “correct” and that new taxa ...
Spencer G. Lucas
doaj   +1 more source

Das Quartärprofil am Steilufer der Elbe bei Lauenburg [PDF]

open access: yesEiszeitalter und Gegenwart, 1965
Stratigraphy and exposure of beds along the bluffs of the river Elbe west of Lauenburg are described. Deposits dated as Miocene, Elster Ice Age and Holstein Interglacial have been encountered in borings only.
K.-D. Meyer
doaj   +1 more source

Zur Gliederung der Holstein- und Saalezeit im östlichen Harzvorland [PDF]

open access: yesEiszeitalter und Gegenwart, 1965
A review is given on the results of researches which were undertaken in the Pleistocene of the eastern foot-hills of the Harz. A terrace could be detected where the gravels have been accumulated during a cold period in the Holstein stage.
R. Ruske
doaj   +1 more source

A drilling data-constrained seismic mapping method for intermediate-mafic volcanic facies

open access: yesPetroleum Exploration and Development, 2016
Based on 112.5 km2 of 3-D seismic data and data of 8 prospecting wells drilled volcanic rocks in the 3rd member of the Paleogene Shahejie Formation in Hongxing area of the Eastern Sag of the Liaohe Depression, Bohai Bay Basin, three levels of volcanic ...
Yuhui FENG   +6 more
doaj   +1 more source

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 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

An origin of ultraslow spreading ridges for the Yarlung-Tsangpo ophiolites

open access: yesFundamental Research, 2022
As relics of ancient ocean lithosphere, ophiolites are the most important petrological evidence for marking the sutures and also play a key role in reconstructing plate configuration.
Chuan-Zhou Liu   +8 more
doaj   +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  

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