A5044241946- Geology and Paleoclimatology Research
- Geochemistry and Geologic Mapping
- Geomagnetism and Paleomagnetism Studies
- Geological formations and processes
- Geological Modeling and Analysis
- Geological and Geochemical Analysis
- Image Processing and 3D Reconstruction
- Pleistocene-Era Hominins and Archaeology
- Archaeology and ancient environmental studies
- Soil Geostatistics and Mapping
- Paleontology and Stratigraphy of Fossils
- Data Analysis with R
- Time Series Analysis and Forecasting
- Seismic Waves and Analysis
- Geochemistry and Elemental Analysis
- Archaeological and Geological Studies
- Geophysics and Sensor Technology
- Linguistics and language evolution
- Cryospheric studies and observations
- Machine Fault Diagnosis Techniques
- Climate change and permafrost
- Geological and Geophysical Studies Worldwide
- Earthquake Detection and Analysis
- Scientific Research and Discoveries
University of Liège
2016-2023
Institute for Space Astrophysics and Planetology
2023
Institute of Natural Sciences
2019-2021
Cyclostratigraphy is an important tool for understanding astronomical climate forcing and reading geological time in sedimentary sequences, provided that imprint of insolation variations caused by Earth's orbital eccentricity, obliquity and/or precession preserved (Milankovitch forcing). Numerous stratigraphic paleoclimate studies have applied cyclostratigraphy, but the robustness methodology its dependence on investigator not been systematically evaluated. We developed Intercomparison...
The StratigrapheR package proposes new concepts for the generation of lithological logs, or lithologs, in R. lithologs a scripting environment opens opportunities processing and analysis stratified geological data.Among presented: plotting data methodologies, general R functions, computer-oriented conventions are provided.The structure allows these to be further improved, which can done independently by any user.The current limitations highlighted, along with processing, help identify best...
Time series analysis of palaeoclimate data is used to identify quasi-periodic changes attributable astronomical forcing insolation by Earth’s axial obliquity and precession, orbital eccentricity, i.e., Milankovitch cycles. Hays et al. (1976) applied time – including spectral analysis, filtering, tuning hypothesis testing on palaeoclimatic from the most recent 500 Ka Earth history demonstrate these parameters. The CENOGRID “splice” (Westerhold al.,...
<p>Paleomagnetic data are used in different formats, adapted to output of a variety devices and specific analysis software. This includes widely openly available software, e.g. PMag.py/MagIC, AGICO/.jr6 & .ged, PuffinPlot/.ppl. Besides these, individual software formats have been established by laboratories.</p><p>Here we compare identify similarities create common interchangeable basis. We introduce the idea paleomagnetic object (pmob),...
<p>Geophysical signals are, in general, strongly non-stationary. Classical techniques, like Fourier and wavelet transform, show their limits producing insightful time-frequency representations. For this reason, the last few years, several new methods have been presented literature. In presentation, we review IMFogram method (pronounced "infogram") its mathematical properties, showing stability robustness to noise parameter tuning.</p>...
During the Middle Cambrian, western Utah (USA) occupied deepest part of House Range embayment along edge North America and accumulated deep-water facies dominated by cm-scale, cyclically interbedded limestone-marl layers (‘rhythmites’) Marjum Formation. The studied section is ~500 m thick spans lower Drumian-lower Guzhangian. rhythmites (cm-scale) are packaged into repeated 2-5 m-thick parasequences larger scale eustatic sequences both characterized more...
Transparent data reporting is a crucial aspect of an integrated and reproducible stratigraphic approach. However, there currently no set standard for doing so. Typically, lithological information can still be found as simple images in publications, rather than importable vector graphics, or better yet, tabulated data. Another problem that often confusion on depth, composite depth interpreted age: format these parameters, the way they are obtained difficult to replicate. This all impedes...
Abstract Depositional changes are studied in three sections encompassing the Danian–Selandian transition, Loubieng (France), Zumaia (Spain) and Sidi Nasseur (Tunisia), using magnetic susceptibility as a proxy. Additional rock-magnetic analyses used to avoid ambiguous interpretation of susceptibility. The susceptibility, measured on 90 270 samples per section, is mainly controlled by paramagnetic minerals linked detrital input. Major increases input correlated end Latest Danian Event,...
<p>StratigrapheR is an open-source integrated stratigraphy package. It available in the free software environment R (https://CRAN.R-project.org/package=StratigrapheR) and designed to generate lithologs a semi-automated way, process stratigraphical information, visualize any plot along environment.</p><p>The basic graphical principle behind StratigrapheR incremental addition of elements drawing: opened, are successively added. This allows...
<p>Cyclostratigraphy is increasingly used to improve the Geologic Time Scale and our understanding of past climatic systems. However, except in a few existing methodologies, quality results often not evaluated.</p><p>We propose new methodology document this quality, through decomposition signal into set narrow band components from which instantaneous frequency amplitude can be computed, using Hilbert transform. The obtained by Empirical Mode...