Results 201 to 210 of about 4,741,231 (319)

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

Reconcilable differences: Using retrospective photogrammetry to bridge the divide between analogue and digital site data collected during long-term excavation projects. [PDF]

PLoS One
Unhammer OF, Haaland MM, Armitage SJ, Henshilwood CS, van Niekerk KL.   +4 more
europepmc   +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

Anthropocene angst: Authentic geology and stratigraphic sincerity. [PDF]

Soc Stud Sci
Damianos A.
europepmc   +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

Enhanced marine biological pump as a trigger for the onset of the late Paleozoic ice age. [PDF]

Sci Adv
Zhang F, Pohl A, Elrick M, Wei GY, Cheng K, Crockford P, Fakhraee M, Lin YB, Li N, Wang XD, Shen SZ.   +10 more
europepmc   +1 more source

Use of LiDAR to derive a new model of glacial hydro‐dynamic events shaping southern Ontario landscapes, Canada

Boreas, EarlyView.
High‐resolution LiDAR data with field validation of inferred southern Ontario ice stream terrains indicate that steady‐state ice streaming is difficult to reconcile with our observations. Rather, these new observations show strong evidence of significant fluvial scouring across the area in which meltwater sheet flow overtopped the landscape.
David R. Sharpe, Chris C. Smart
wiley   +1 more source

Characteristics and Controlling Factors of Natural Fractures in Deep Carbonates of the Puguang Area, Sichuan Basin, China. [PDF]

ACS Omega
Shi J, Zhao X, Zhang Y, You Y, Shang M, Zhu Z.   +5 more
europepmc   +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, Benjamin Pohl, Jean‐François Buoncristiani, Sophie Montuire   +4 more
wiley   +1 more source

Morphology and sedimentology of murtooized terrain on the southern Fraser Plateau, British Columbia, Canada

Boreas, EarlyView.
Recent public releases of Light Detection and Ranging (LiDAR) data in south central British Columbia (BC), Canada have revealed several landforms resembling ‘murtoos’, previously identified across portions of Scandinavia. In this study, we investigate the morphology and sedimentology of these landforms, the first report of their kind associated with ...
Alexander D. Sodeman, Tracy A. Brennand
wiley   +1 more source