Results 161 to 170 of about 76,911 (338)

Sedimentary Basins of the East Siberian Sea and the Chukchi Sea and the Adjacent Area of the Amerasia Basin: Seismic Stratigraphy and Stages of Geological History [PDF]

, 2019
А. М. Никишин, К. Ф. Старцева, V. E. Verzhbitsky, Sierd Cloetingh, N. A. Malyshev, E. I. Petrov, Henry W. Posamentier, S. I. Freiman, M. D. Lineva, Nikolay N. Zhukov   +9 more
openalex   +1 more source

Million years of Greenland Ice Sheet history recorded in ocean sediments [PDF]

, 2011
Geological records from Tertiary and Quaternary terrestrial and oceanic sections have documented the presence of ice caps and sea ice covers both in the Southern and the Northern hemispheres since Eocene times, approximately since 45 Ma.
Jessen, Catherine, Knutz, Paul, Kuijpers, Antoon, Mikkelsen, Naja, Nørgaard-Pedersen, Nils, Spielhagen, Robert F., Thiede, Jörn   +6 more
core  

Drastic peatland regime shift and landscape disturbances connected to warm and cold climate events over the past centuries in subarctic Finland

Boreas, EarlyView.
Palaeoecological studies reporting long‐term development histories of subarctic fens—explicitly, orohemiarctic peatlands—are scarce, and overall, permafrost‐free peatlands located in the immediate vicinity of permafrost zones have received little attention in Fennoscandia. Here, we use a multiproxy approach to study the millennial‐scale dynamics of two
Sanna R. Piilo, Mari Kuoppamaa, Teemu Tahvanainen, Timo Kumpula, Niina Kuosmanen, Marc  Macias‐Fauria, Minna Väliranta   +6 more
wiley   +1 more source

Food web reconstruction of Barmaky, the oldest post‐LGM hunter‐gatherer site in north‐western Ukraine

Boreas, EarlyView.
The site of Barmaky currently marks the oldest Epigravettian occupation of north‐western Ukraine shortly after the Last Glacial Maximum (LGM), dated to around 19 cal. ka BP. Stable isotope analyses of bone collagen from six terrestrial mammals and two bird species show a comparatively highly structured palaeo‐food web.
Lilian Reiss, Kerstin Pasda, Christoph Mayr, Patrick Ludwig, Laura Stiller, Victor Chabai, Andreas Maier   +6 more
wiley   +1 more source

The orbital record in stratigraphy [PDF]

Orbital signals are being discovered in pre-Pleistocene sediments. Due to their hierarchical nature these cycle patterns are complex, and the imprecision of geochronology generally makes the assignment of stratigraphic cycles to specific orbital cycles ...
Fischer, Alfred G.
core   +1 more source

Km-scale mounds and sinkites formed by buoyancy driven stratigraphic inversion

Communications Earth & Environment
Oligo-Miocene strata in the northern North Sea comprise hundreds of enigmatic km-scale sand-cored mounds. We investigated these using a basin-scale 3D seismic dataset coupled with petrophysical logs and cuttings mineralogy for hundreds of wells.
Jan Erik Rudjord, Mads Huuse
doaj   +1 more source

Persistence and dynamic of forest snails in the Western Carpathians over the last 40 thousand years

Boreas, EarlyView.
The glacial/interglacial cycles have shaped the landscape of temperate Europe for the past 2.5 million years, with open landscapes prevailing during the glacial and forested landscapes during the interglacial periods. However, the survival and recolonization strategies of temperate forest species during glacial phases remain poorly understood and hotly
Lucie Juřičková, Jitka Horáčková, Veronika Horsáková, Petra Hájková, Jan Hošek, Michal  Horsák   +5 more
wiley   +1 more source

Combining morphological and molecular data to study past foraminiferal communities from a temperate coastal sediment core

Boreas, EarlyView.
This paper presents the results of a dual approach for assessing fossil benthic foraminiferal communities using both traditional morphology‐based analyses and sedimentary ancient DNA (sedaDNA) metabarcoding. The main objectives are to test the feasibility of sedaDNA analyses to assess foraminiferal biodiversity in temperate shelf sediments (Le Croisic,
Meryem Mojtahid, Magali Schweizer, Damien Le Moigne, Gwendoline Grégoire, Anne  Murat, Isabelle Poirier, Agnès Baltzer, Inge van Dijk, Marie‐Christine Morère‐Le Paven, Martin Bourges, Maria Pia Nardelli, Christine Barras, Edouard Metzger, Aurelia Mouret   +13 more
wiley   +1 more source

Differential control of syndepositional faults on sequence stratigraphy and depositional systems during main rift I stage in the southeastern fault zone of Qingxi Sag, Jiuquan Basin, Northwestern China [PDF]

, 2015
Chengcheng Zhang, Hua Wang, Yuantao Liao, Zongsheng Lu, Jianrong Tang   +4 more
openalex   +1 more source

Automated X‐ray computed tomography‐based analysis of clast fabric in drill‐cores of glacial diamicts using deep learning models

Boreas, EarlyView.
Clast‐fabric analysis is a widely used method for investigating depositional and deformation processes in glacial sediments. However, traditional field‐based approaches lack standardization, are time consuming and introduce sampling bias. This study aimed to develop a novel approach to automate clast‐fabric analysis using machine learning‐based image ...
Bennet Schuster, David Mair, Timothy C. Schmid, Lukas Gegg, Marius W. Buechi, Sebastian Schaller, Flavio S. Anselmetti, Frank Preusser   +7 more
wiley   +1 more source