Results 91 to 100 of about 1,994 (297)

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

Shoreline and deglaciation chronology in southeast Norway

Boreas, EarlyView.
The postglacial relative sea level history is reconstructed in four areas of mid‐ and inner Oslofjorden in southeast Norway. The reconstructions are based on radiocarbon‐dated raised shoreline levels from 42 sites, mainly isolation basins, and limiting ages from four lakes above the marine limit.
Anders Romundset, Isak Roalkvam, Mikis van Boeckel, Fredrik Høgaas, Kari E.  Henningsmoen, Helge I. Høeg, Rolf Sørensen   +6 more
wiley   +1 more source

Living on the edge: Pleistocene ice‐free refugia and collared lemming (Dicrostonyx sp.) in the North American High Arctic

Boreas, EarlyView.
Comparing the morphological variation of North American collared lemming with climatic and geographic features, as well as genetic insight and the ice sheet extend, indicate the strong geographic structure underlying the morphological diversity of the genus, that might be linked with a local Pleistocene survival in the High Arctic.
Louis Arbez, Aurelien Royer, Oliver Gilg, Benjamin Pohl, Jean‐François Buoncristiani, Sophie Montuire   +5 more
wiley   +1 more source

Early Holocene jökulhlaup chronology and deglaciation dynamics in central Iceland

Boreas, EarlyView.
Glacial lake outburst floods (jökulhlaups) have occurred throughout the Quaternary in glaciated regions worldwide. Reconstructing flood chronology yields insight into deglaciation processes, environmental change and the role of extreme events in landscape evolution.
Greta H. Wells, Þorsteinn Sæmundsson, Edwin R. C. Baynes, Timothy Beach, Sheryl Luzzadder‐Beach   +4 more
wiley   +1 more source

GEOMORPHOLOGICAL STUDIES OF JOVAN CVIJIĆ IN BULGARIA

Zbornik Radova: Geografski institut "Jovan Cvijić", 2016
The geomorphologic studies of Jovan Cvijić in Bulgaria are crucial for many Earth scientists from the beginning of the 20th century. Cvijić laid the foundations of the morphotectonic division of the Balkan Peninsula, clarified a number of tectonic and ...
Valentin Nikolov, Mariyana Nikolova
doaj  

A North Greenland‐wide in situ cosmogenic 14C ice sheet chronology since the Lateglacial

Boreas, EarlyView.
Knowledge of the glacial history of the North Greenland Ice Sheet is crucial due to its high sensitivity to climate change. However, because the ice sheet in this region is predominantly cold‐based, resulting in low erosion rates, using 10Be exposure dating to establish reliable ice sheet chronologies has proven very challenging due to nuclide ...
Anne Sofie Søndergaard, Astrid Rosenberg, Mads Faurschou Knudsen, Kristina Hippe, Marcus  Christl, Negar Haghipour, Olivia Steinemann, Kurt H. Kjær, Nicolaj Krog Larsen   +8 more
wiley   +1 more source

Late‐Holocene evolution of a small Sub‐Arctic glacier, Gljúfurárjökull (Tröllaskagi, northern Iceland)

Boreas, EarlyView.
Gljúfurárjökull, located on the Tröllaskagi Peninsula in northern Iceland, is a small glacier approximately 3.8 km in length. This study analyses the glacier's evolution through a combination of methods including: (i) geomorphological mapping, (ii) Cosmic‐Ray Exposure (CRE) dating, (iii) lichenometry and (iv) palaeoglacier reconstruction (volume ...
Nuria Andrés, José M. Fernández‐Fernández, David Palacios, Irene Schimmelpfennig, Leopoldo G. Sancho, Skafti Brynjólfsson, Þorsteinn Sæmundsson, Wesley R. Farnsworth, Luis M. Tanarro, Mariano Brito, Javier Santos‐González, Rosa B. González‐Gutiérrez, ASTER Team, Georges Aumaître, Karim Keddadouche   +14 more
wiley   +1 more source

Out in the cold? A review of Early Middle Palaeolithic settlements in northern Central Europe, age data and geological preconditions for site formation and preservation

Boreas, EarlyView.
The characteristics of settlement of Neanderthals in northern Central Europe during the earlier phases of the Middle Palaeolithic (Marine Isotope Stage 8–6) have been a matter of debate for decades, specifically regarding the population dynamics at such latitudes during the coldest phases. In this paper, we review the known archaeological record of the
Gianpiero Di Maida, Jutta Winsemann, Malte Hoffmann, Tobias Lauer, Utz Böhner, Thomas Terberger   +5 more
wiley   +1 more source

Morphology and distribution of lakes under the Laurentide Ice Sheet: implications for ice flow dynamics

Boreas, EarlyView.
This study examines the distribution and morphology of lakes under the Laurentide Ice Sheet (LIS) to investigate relationships with ice flow velocity, bedrock and basal thermal regime. Palaeo‐ice streams and lobes were important components of the LIS, and properties of lakes in those regions are quantified at high resolution.
Sarah M. Principato, Carissa M. Mobley
wiley   +1 more source

Geomorphological and historical records of the surge-type behaviour of Hansbreen (Svalbard)

Annals of Glaciology
This paper presents geomorphological and historical records of the surge-type behaviour of Hansbreen, one of the most studied tidewater glaciers in Svalbard.
Aleksandra Osika, Jacek Jania
doaj   +1 more source