Results 11 to 20 of about 3,284 (255)

The Salittu Formation in southwestern Finland, part I: Structure, age and stratigraphy [PDF]

open access: yesBulletin of the Geological Society of Finland, 2016
Because of the relatively low metamorphic grade, low strain and well-preserved early structures in volcanic and volcaniclastic rocks, the Orijärvi triangle (in the center of the larger Orijärvi area) is one of the few locations in the Svecofennian orogen
M. Nironen, I. Mänttäri, M. Väisänen
doaj   +1 more source

The History of the Aptian Stage Stratigraphy and Ammonoids of the Central Part of the Northern Caucasus Studies. Paper 2. 1970 to Present [PDF]

open access: yesИзвестия Саратовского университета. Новая серия: Серия Науки о Земле
The offering work covers the history of the Aptian stage stratigraphy and ammonites studies of the central part of the Northern Caucasus. Its first part, devoted to the history of the mid-19th century to the mid-20th century, was published earlier.
Polkovoi, Kirill Sergeevich
doaj   +1 more source

Sharp‐based shoreface successions reconsidered in three‐dimensions: A forward stratigraphic modelling perspective

open access: yesThe Depositional Record, 2022
Sea‐level fall is commonly inferred to generate a sharp‐based shoreface succession that displays an abrupt vertical transition from heterolithic, lower shoreface to sandy, upper shoreface deposits across a marine erosion surface.
Brian J. Willis   +2 more
doaj   +1 more source

Sedimentary stratigraphy of Lake Chalco (Central Mexico) during its formative stages [PDF]

open access: yesInternational Journal of Earth Sciences, 2021
Lake Chalco lies south of the Basin of Mexico and has been the subject of studies related to Late Quaternary climate variability. In 2016, the International Continental Scientific Drilling Program “MexiDrill Project” recovered a 520-m sediment record from Lake Chalco.
Rodrigo Martínez-Abarca   +8 more
openaire   +3 more sources

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

Marine Isotope Stages: Oxygen Isotope Stratigraphy

open access: yes, 2022
versión ...
Bardají, Teresa, Lario Gómez, Javier
openaire   +2 more sources

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

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

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