A5044639257- Geology and Paleoclimatology Research
- Geological formations and processes
- Paleontology and Stratigraphy of Fossils
- Geological and Geophysical Studies Worldwide
- Methane Hydrates and Related Phenomena
- Geological Studies and Exploration
- Geochemistry and Geologic Mapping
- Time Series Analysis and Forecasting
- Coastal and Marine Dynamics
- Image Processing and 3D Reconstruction
- Geological Modeling and Analysis
- Hydrocarbon exploration and reservoir analysis
- Astro and Planetary Science
- Geochemistry and Elemental Analysis
- Geomagnetism and Paleomagnetism Studies
- Geological and Geochemical Analysis
- Geological and Geophysical Studies
- Geological Formations and Processes Exploration
- Scientific Research and Discoveries
- Marine and environmental studies
- Radio Astronomy Observations and Technology
- Pleistocene-Era Hominins and Archaeology
- Isotope Analysis in Ecology
- Antenna Design and Analysis
- Electromagnetic Compatibility and Measurements
University of Liège
2020-2024
The Early Carboniferous successions in the Namur-Dinant Basin (NDB) Belgium spans transition from Devonian Greenhouse to Late Paleozoic Ice Age (LPIA). Sections basin have been extensively studied, resulting establishment of a stratigraphic framework. role orbital forcing on sedimentary cycles during Tournaisian-Visean interval remains unclear. Although cyclic patterns visually identified [1], detailed cyclostratigraphic analysis has yet be conducted.Our primary objective is enhance...
The WaverideR  R package was initially developed to use the Continuous Wavelet Transform (CWT) conduct cyclostratigraphic analyses. In initial release of package, functions mainly focussed on plotting wavelet scalograms, extracting astronomical cycles from CWT and create simple age-models. Over time WaverideR has seen some major updates in capabilities regarding both functionality visualisation results. Enhanced options now allow users customise with flexible directions an array...
This report was submitted as part of the SKA Low Frequency Aperture Array Critical Design Review describing design SKA1-LOW station that took place between 2013 and 2018. The SKA1 LOW field is inscribed in a circular area having an effective diameter (centre to centre) 38 meters has 256 SKALA4 elements. document describes electromagnetic station. In particular it layout modelling characteristics effects associated with array such mutual coupling effects, side lobe pattern beam shape (eg....
ABSTRACT The Rifian Corridor was an ancient sea strait that connected the Mediterranean Sea with Atlantic Ocean during Miocene. Key outcrop exposures of this corridor's sedimentary fill are exposed at Ben Allou, El Adergha, and Driouate localities, in Fez–Meknes region, Morocco. These display cyclic successions formed immediately before disappearance Corridor, associated isolation desiccation Sea. Sedimentary cycles Allou consist of: facies 1, Organic-matter-bearing blue claystones; 2, gray...
Abstract Sea straits are elongated zones where geographical constriction can amplify marine currents. Sediment deposits that formed in sea relatively well studied and robust models of tidal strait depositional systems have been developed. However, strait-adjacent remain uncommon. In this study, we present such a model which is based on detailed outcrop descriptions Miocene adjacent to the Rifian Corridor, an ancient existed what now northern Morocco. The kilometre-scale outcrops at Ben Allou...
This study proposes that sandstone layers exposed in the Fez-Meknes region of Northern Morocco (Ben Allou (Sidi Chaded) and El Adergha localities), have been misinterpreted as unique examples geostrophically-driven, deep marine (150 - 400 m water depth) sandy contourites. Instead, our independent paleontological, sedimentological, stratigraphic analyses show these sandstones represent more common, shallow (0 30 tide-dominated deltas. Our findings imply at least seven existing studies based...
Sea straits are elongate basin geometries that common in the sedimentary record and play a key role oceanography climate. Due to intricate confluence of marine processes typically complex structural settings sea straits, many stratigraphic characteristics these depositional systems not fully understood. To better resolve these, we study excellent exposures marginal strait deposits, which crop out Fez-Meknes region northern Morocco. These mixed carbonate-siliciclastic deposits represent fill...
The Silurian Ireviken Event is a biogeochemical event characterised by extinctions among several marine groups and major perturbation to the global carbon cycle. In Altajme core from Gotland, Sweden, associated Carbon Isotope Excursion (ICIE) reaches peak values of ~6‰. Within ICIE, main -6‰ (δ13Ccarb) superimposed multiple short-term small amplitude positive peaks (+1.00 ‰ δ13Ccarb), while tail negative (-1.55 δ13Ccarb). To understand...
Abstract Middle Cambrian offshore deposits of the Marjum Formation, Utah, USA, are characterized by four scales superimposed cyclicity defined varying fine siliciclastic versus limestone abundances; these include limestone-marl couplets (rhythmites; 5–10 cm), which bundled into parasequences (1–2 m) and small-scale (5–10 large-scale (20–40 sequences. Time series analysis SiO2 lithologic rank stratigraphic reveal cycles consistent with Milankovitch periods corresponding to orbital...
The type-Silurian Cellon section in the Carnic Alps Austria underpins much of current Silurian conodont zonations, forming basis for timescale. However, record lacks radiometric and astrochronological age constraints, making it difficult to gain insights into processes pacing (anoxic) events. To attain constraints investigate events by astronomical cycles, a cyclostratigraphic study was conducted on high-resolution pXRF (CaO, Al 2 O 3 , Fe ) induration records spanning Ludlow Pridoli parts...
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...
Cyclostratigraphic studies are based on accurately identifying astronomical cycles in the geological record. In excellent records, observed can be directly coupled to their corresponding cycles. more complex records spectral analysis techniques needed identify Most cyclostratigraphic utilise Fast Fourier transform (FFT). FFT-based orbital when signal is stationary (e.g., sedimentation rate constant). To track changes rate, a sliding window-based FFT often implemented, resulting frequency...
<p>The cumulative work of geoscientists over the past decades has shown that Silurian Period which was once thought as warm and climatically stable time interval is in fact punctuated by numerous paleoenvironmental perturbations or events. These events follow a similar pattern where minor extinction event precedes substantial carbon isotope excursion. Many theories have been brought forward to explain these ranging from glaciations, changes precipitations patterns, ocean...
<p>The Silurian (443.8-419.2 million years ago) is a period of important biodiversity changes, dynamic climate change, including strong sea level fluctuations and the development low-oxygen conditions in ocean<sup>1-2-3</sup>. To date lacks (cyclostratigraphic) age constraints understanding way astronomical cycles modulate climate, which hinders our dynamics. assess role pacing we study imprint on record Sommerode-1 core from Bornholm, Denmark...
<p>The Hangenberg Crisis, at the Devonian-Carboniferous Boundary, severely affected marine realm. The crisis is characterised by several events associated with change in sedimentation and biotic extinctions turnovers. Black Shale event that recorded extinction peak pelagic realm corresponds to a widespread development of oceanic anoxia and/or dysoxia. Sandstone an neritic fauna shallow-water settings, including final demise classical Devonian faunas (stromatoporoids,...
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at Paleoceanography Paleoclimatology. ESSOAr a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing the latest version by default [v1]Secular resonance transitions in late Cretaceous astronomical imprints during Oceanic Anoxic Event II (Schill Grund Platform, North Sea, Offshore...
Sea strait geographies amplify tidal currents, which can result in the formation of deposits with a symmetrical facies arrangement. It be problematic to distinguish such confined from systems that developed less constricted settings. To push more robust differentiation between model and for deposits, this study presents an example strait-adjacent delta compares it existing straits. The interpretations are based on exposed succession Northern Morocco, formed Miocene Rifian Corridor. multi-km,...
<p>The Ireviken Biogeochemical Event (IBE) consists of the Extinction (IEE) and is superseded by positive d13Ccarb Excursion (ICIE). During 80% conodont species 50% trilobite went extinct Acritarchs, chitinozoans, graptolites, corals, brachiopods communities were severely affected as well. Currently there are no indications that event can be linked to a LIP or bolide impact which usual triggers for most known biogeochemical events. The IBE has been tentatively SEDEX brine...