Results 41 to 50 of about 76,911 (338)

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

Stratigraphy and Chronology of Karst Features on Rodriguez Island, Southwestern Indian Ocean [PDF]

open access: yes, 2015
This publication has been made available with the permission of the National Speleological Society (www.caves.org).
Burney, DA   +5 more
core   +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

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

Gradational development of slaty cleavage to schistosity -an example from the Iberian Pyrite Belt, Spain- [PDF]

open access: yes, 1994
The Iberian Pyrite Belt is an Upper Paleozoic succession which has been divided into the Phyllite-Quartzite Group, the Volcanic-Sliceous Complex and the Culm Group in ascending order from base to the top. The contacts among them are conformable.
Suzuki, shigeyuki
core   +1 more source

Intercalibration of Boreal and Tethyan timescales: the magneto-biostratigraphy of the Middle Triassic and the latest Early Triassic from Spitsbergen, Arctic Norway [PDF]

open access: yes, 2008
An integrated bio-magnetostratigraphic study of the latest Early Triassic to the upper parts of the Middle Triassic, at Milne Edwardsfjellet in central Spitsbergen, Svalbard, allows a detailed correlation of Boreal and Tethyan biostratigraphies.
Hounslow, Mark W.   +6 more
core   +1 more source

Distinguishing climate and tectonic signals in the stratigraphy of the Kura Basin, the southeastern foreland of the Greater Caucasus

open access: yesSedimentologika
Assessing the relative contributions of tectonics and climate in orogenic systems and the stratigraphy preserved within their fringing basins has guided research for decades.
Kristoffer Fowler, Adam M. Forte
doaj   +1 more source

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