Detecting transience in slow evolution landscapes using cosmogenic nuclides and high resolution morphometry

2021 ◽  
Author(s):  
Vincent Godard ◽  
Andre Salgado ◽  
Lionel Siame ◽  
Jules Fleury ◽  
Aster Team
Keyword(s):  
High Resolution ◽  
Boundary Conditions ◽  
Late Pleistocene ◽  
Diffusion Theory ◽  
Cosmogenic Nuclides ◽  
New Approach ◽  
Se Brazil ◽  
Climatic Event ◽  
Slow Evolution ◽  
Middle And Late Pleistocene

<p>Transient evolution and adjustment to changing tectonic and climatic boundary conditions is an essential attribute of landscapes. We present a new approach to detect and quantify transience in slow erosion landscapes over 100 ka timescales. We compare curvature and cosmogenic nuclides measurements (<sup>10</sup>Be and <sup>26</sup>Al) at hilltop sites with predictions of hillslope diffusion theory, in the slowly evolving quartzitic Serra do Cipó range in SE Brazil, and we observe a distinctive signature of an acceleration of denudation. The timing of this increase cannot be unequivocally associated with a single climatic event but is consistent with climatically-modulated important fluctuations in precipitation and erosion in this area during Middle and Late Pleistocene.</p>

scholarly journals Stratigraphic Position of Tills in the Orłowo Cliff Section (Northern Poland): A New Approach

2018 ◽  
Vol 35 (1) ◽  
pp. 25-40 ◽  
Author(s):  
Piotr Paweł Woźniak ◽  
Robert J. Sokołowski ◽  
Piotr Czubla ◽  
Stanisław Fedorowicz
Keyword(s):  
Late Pleistocene ◽  
Petrographic Analysis ◽  
Significant Shift ◽  
Petrographic Composition ◽  
New Approach ◽  
Stratigraphic Position ◽  
Middle And Late Pleistocene ◽  
Late Weichselian ◽  
Till Fabric ◽  
Time Frames

Abstract The site at Orłowo Cliff was used to analyse the stratigraphic position and palaeogeographic interpretations of the properties and depositional conditions of two basal tills from the Late Pleistocene. A multi-proxy approach involved lithofacies, petrographic analysis of the fine gravel fraction, analyses of indicator erratics and till fabric. TL dating of intra-moraine deposits was used to determine depositional time frames of tills. The sediment profile at Orłowo Cliff shows a distinct reduction in number of Pleistocene units. Obtained dating results suggest the presence of Middle and Late Pleistocene fluvial units. The main issue discussed is the stratigraphic position of the older till (Unit O-4). It can be assumed that this till was deposited probably during the Middle Weichselian (MIS4). At Orłowo Horn the till of Unit O-4 reveals incorporation of the erratic material derived from an older till in the surrounded area (according to petrographic composition - probably from MIS 8). The younger till (Unit O-6) was deposited in the Late Weichselian (MIS 2). Moreover, the till of Unit O-6 is characterised by a significant shift towards the south-west in terms of the erratic origin in Unit O-4.

scholarly journals High-resolution neutron imaging: a new approach to characterize water in anodic aluminum oxides

2020 ◽  
Vol 8 ◽  
pp. 100121
Author(s):  
Noémie Ott ◽  
Claudia Cancellieri ◽  
Pavel Trtik ◽  
Patrik Schmutz
Keyword(s):  
High Resolution ◽  
Neutron Imaging ◽  
Aluminum Oxides ◽  
New Approach ◽  
Anodic Aluminum

High-Resolution Oxygen Isotope Diagram of Late Pleistocene Ice Wedges of Seyakha Yedoma, Eastern Yamal Peninsula

2019 ◽  
Vol 487 (1) ◽  
pp. 823-826 ◽  
Author(s):  
Yu. K. Vasil’chuk ◽  
N. A. Budantseva ◽  
A. C. Vasil’chuk
Keyword(s):  
High Resolution ◽  
Oxygen Isotope ◽  
Late Pleistocene ◽  
Yamal Peninsula

Pleistocene ungulates from the Bow River gravels at Cochrane, Alberta

1968 ◽  
Vol 5 (6) ◽  
pp. 1467-1488 ◽  
Author(s):  
C. S. Churcher
Keyword(s):  
United States ◽  
Late Pleistocene ◽  
Rangifer Tarandus ◽  
Ovis Canadensis ◽  
Southern United States ◽  
Rangifer Tarandus Caribou ◽  
Cervus Canadensis ◽  
North Bank ◽  
Middle And Late Pleistocene

Five ungulates are reported from gravels comprising the second major terrace above the Bow River's north bank at Cochrane, Alberta. These ungulates are Cervus canadensis (wapiti), Rangifer tarandus (caribou), Ovis canadensis (mountain sheep), Bison occidentalis (extinct western bison), and Equus conversidens (extinct Mexican ass). E. conversidens was previously known from middle and late Pleistocene beds of the southern United States and Mexico and is here reported from the post-Wisconsin Pleistocene of Alberta and possibly Saskatchewan. Radiocarbon analysis of Bison bones from the gravels yielded two dates that averaged 11 065 B.P.

New Approach for Versatile Self Piercing Riveting: Joining System and Auxiliary Part

2021 ◽  
Vol 883 ◽  
pp. 3-10
Author(s):  
Fabian Kappe ◽  
Mathias Bobbert ◽  
Gerson Meschut
Keyword(s):  
Boundary Conditions ◽  
Research Work ◽  
High Load ◽  
Continuous Increase ◽  
New Approach ◽  
Load Bearing ◽  
Mechanical Joining ◽  
Wide Range ◽  
Riveting Process

The increasing use of multi-material constructions lead to a continuous increase in the use of mechanical joining techniques due to the wide range of joining possibilities as well as the high load-bearing capacities of the joints. Nevertheless, the currently rigid tool systems are not able to react to changing boundary conditions, like changing the material-geometry-combination. Therefore research work is crucial with regard to versatile joining systems. In this paper, a new approach for a versatile self-piercing riveting process considering the joining system as well as the auxiliary joining part is presented.

Sign in / Sign up

Export Citation Format

Share Document