William Helland‐Hansen
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View article: Shifting shorelines in a warming world: Deciphering coastal landscape sensitivity to climate change from the Paleocene Greenhouse of Arctic Svalbard
Shifting shorelines in a warming world: Deciphering coastal landscape sensitivity to climate change from the Paleocene Greenhouse of Arctic Svalbard Open
Predicting the impact of the present-day global warming on the world’s shorelines is crucial for mapping future coastal hazards. Coastal environments are particularly sensitive to climate change, because the balance in the accumulati…
View article: Deep‐water sand transfer by hyperpycnal flows, the Eocene of Spitsbergen, Arctic Norway
Deep‐water sand transfer by hyperpycnal flows, the Eocene of Spitsbergen, Arctic Norway Open
Flood‐generated hyperpycnal flows are dense, sediment‐laden, turbulent flows that can form long‐lived, bottom‐hugging turbidity currents, which undoubtedly transport large volumes of fine‐grained sediments into the ocean. However, their ab…
View article: A comparison of ancient deltaic shoreline progradation with modern deltaic progradation rates: Unravelling the temporal structure of the shallow‐marine Blackhawk Formation, Upper Cretaceous Western Interior Seaway, <scp>USA</scp>
A comparison of ancient deltaic shoreline progradation with modern deltaic progradation rates: Unravelling the temporal structure of the shallow‐marine Blackhawk Formation, Upper Cretaceous Western Interior Seaway, <span>USA</span> Open
Understanding how sedimentary rocks represent time is one of the significant challenges in sedimentology. Sedimentation rates retrieved from vertical sections are strongly timescale dependent, which means that we cannot use empirical rate …
View article: Deep-time paleoclimate archive in High Arctic, Svalbard, Norway
Deep-time paleoclimate archive in High Arctic, Svalbard, Norway Open
<p>An appraisal of ancient Earth&#8217;s climate dynamics is crucial for understanding the modern climate system and predicting how this might change in the future. Major climate-shift events in the Earth&#8217;s past demonst…
View article: Assessing first‐order BQART estimates for ancient source‐to‐sink mass budget calculations
Assessing first‐order BQART estimates for ancient source‐to‐sink mass budget calculations Open
Constraining the timing and volume of sediment dispersal in an ancient sedimentary system is vital to understand a basin's infill history. One preferred method for a first‐order approximation of ancient sediment load estimates, the BQART m…
View article: Editorial: Sedimentary System Response to External Forcings: A Process-Based Perspective
Editorial: Sedimentary System Response to External Forcings: A Process-Based Perspective Open
EDITORIAL article Front. Earth Sci., 11 September 2020Sec. Sedimentology, Stratigraphy and Diagenesis Volume 8 - 2020 | https://doi.org/10.3389/feart.2020.591420
View article: The Svalbard Eocene‐Oligocene (?) Central Basin succession: Sedimentation patterns and controls
The Svalbard Eocene‐Oligocene (?) Central Basin succession: Sedimentation patterns and controls Open
A synthesis has been undertaken based on regionally compiled data from the post early Eocene foreland basin succession of Svalbard. The aim has been to generate an updated depositional model and link this to controlling factors. The more t…
View article: Sediment budget in a recently glaciated western Norwegian fjord
Sediment budget in a recently glaciated western Norwegian fjord Open
<p>Western Norwegian fjord-valley systems represent archives of changes in sedimentary processes, and typically exhibit a pronounced change in depositional environment related to the transition from glacial to interglacial conditions…
View article: Tempestite facies variability and storm‐depositional processes across a wide ramp: Towards a polygenetic model for hummocky cross‐stratification
Tempestite facies variability and storm‐depositional processes across a wide ramp: Towards a polygenetic model for hummocky cross‐stratification Open
The hydrodynamic mechanisms responsible for the genesis and facies variability of shallow‐marine sandstone storm deposits (tempestites) have been intensely debated, with particular focus on hummocky cross‐stratification. Despite being ubiq…
View article: The largest delta plain in Earth’s history
The largest delta plain in Earth’s history Open
Delta plains host heavily populated and extensive agricultural areas with strong anthropogenic overprints on the natural evolution of these important landforms. Furthermore, modern delta plains have formed over a short geological time fram…
View article: Mud‐rich delta‐scale compound clinoforms in the Triassic shelf of northern Pangea (Havert Formation, south‐western Barents Sea)
Mud‐rich delta‐scale compound clinoforms in the Triassic shelf of northern Pangea (Havert Formation, south‐western Barents Sea) Open
In recent years it has become clear that many shallow‐marine heterolithic and mudstone‐dominated successions are deposited as mud belts forming part of subaqueous deltas that are related to major fluvial sources either upstream or along sh…
View article: Progradation Rates Measured at Modern River Outlets: A First‐Order Constraint on the Pace of Deltaic Deposition
Progradation Rates Measured at Modern River Outlets: A First‐Order Constraint on the Pace of Deltaic Deposition Open
We present a compilation of modern shoreline progradation rates measured close to river outlets entering deltaic coastlines, and we discuss how these observations relate to the overall evolution of both modern and ancient deltaic coastline…
View article: Revisiting morphological relationships of modern source-to-sink segments as a first-order approach to scale ancient sedimentary systems
Revisiting morphological relationships of modern source-to-sink segments as a first-order approach to scale ancient sedimentary systems Open
Catchments provide water and sediment to downstream sedimentary systems, and these form individual source-to-sink systems. Source-to-sink systems comprise adjacent linked segments, commonly hinterland catchments, alluvial- and coastal plai…
View article: Clinoforms and clinoform systems: Review and dynamic classification scheme for shorelines, subaqueous deltas, shelf edges and continental margins
Clinoforms and clinoform systems: Review and dynamic classification scheme for shorelines, subaqueous deltas, shelf edges and continental margins Open
Clinoforms are inclined and normally basinward-dipping horizons developed over a range of spatial and temporal scales in both siliciclastic and carbonatic systems. The study of clinoform successions underpins sequence stratigraphy and all …
View article: The distribution of rivers to terrestrial sinks: Implications for sediment routing systems
The distribution of rivers to terrestrial sinks: Implications for sediment routing systems Open
Empirical observations used to constrain controls on large global modern river systems typically use catchment delineations depicting drainage patterns of rivers to oceans. A key component in the spatial and temporal discharge of sediment …
View article: Using climate to relate water discharge and area in modern and ancient catchments
Using climate to relate water discharge and area in modern and ancient catchments Open
Models relating sediment supply to catchment properties are important in order to use the geological record to deduce landscape evolution and interplay between tectonics and climate. Water discharge ( Q w ) is an important factor in the wi…
View article: Linking an Early Triassic delta to antecedent topography: Source-to-sink study of the southwestern Barents Sea margin
Linking an Early Triassic delta to antecedent topography: Source-to-sink study of the southwestern Barents Sea margin Open
Present-day catchments adjacent to sedimentary basins may preserve geomorphic elements that have been active through long intervals of time. Relicts of ancient catchments in present-day landscapes may be investigated using mass-balance mod…
View article: LA–ICPMS U–Th–Pb isoptopic data. Depositional history of a condensed shallow marine reservoir succession: stratigraphy and detrital zircon geochronology of the Jurassic Stø Formation, Barents Sea
LA–ICPMS U–Th–Pb isoptopic data. Depositional history of a condensed shallow marine reservoir succession: stratigraphy and detrital zircon geochronology of the Jurassic Stø Formation, Barents Sea Open
Supplementary Table S8: LA–ICPMS U–Th–Pb isoptopic data
View article: Sample location, well reference and depth. Depositional history of a condensed shallow marine reservoir succession: stratigraphy and detrital zircon geochronology of the Jurassic Stø Formation, Barents Sea
Sample location, well reference and depth. Depositional history of a condensed shallow marine reservoir succession: stratigraphy and detrital zircon geochronology of the Jurassic Stø Formation, Barents Sea Open
Supplementary Table S5: Sample location, well reference and depth
View article: Conceptual cross section showing the evolution of the parasequences in the Stø. Depositional history of a condensed shallow marine reservoir succession: stratigraphy and detrital zircon geochronology of the Jurassic Stø Formation, Barents Sea
Conceptual cross section showing the evolution of the parasequences in the Stø. Depositional history of a condensed shallow marine reservoir succession: stratigraphy and detrital zircon geochronology of the Jurassic Stø Formation, Barents Sea Open
Supplementary Figure S3: Conceptual cross section showing the evolution of the parasequences in the Stø
View article: Selected microphotographs of thin sections. Depositional history of a condensed shallow marine reservoir succession: stratigraphy and detrital zircon geochronology of the Jurassic Stø Formation, Barents Sea
Selected microphotographs of thin sections. Depositional history of a condensed shallow marine reservoir succession: stratigraphy and detrital zircon geochronology of the Jurassic Stø Formation, Barents Sea Open
Supplementary Figure S7: Selected microphotographs of thin sections
View article: Analytical Method. Depositional history of a condensed shallow marine reservoir succession: stratigraphy and detrital zircon geochronology of the Jurassic Stø Formation, Barents Sea
Analytical Method. Depositional history of a condensed shallow marine reservoir succession: stratigraphy and detrital zircon geochronology of the Jurassic Stø Formation, Barents Sea Open
Appendix 1: Analytical Method
View article: Photos of cored intervals from northern wells. Depositional history of a condensed shallow marine reservoir succession: stratigraphy and detrital zircon geochronology of the Jurassic Stø Formation, Barents Sea
Photos of cored intervals from northern wells. Depositional history of a condensed shallow marine reservoir succession: stratigraphy and detrital zircon geochronology of the Jurassic Stø Formation, Barents Sea Open
Supplementary Figure S2: Photos of cored intervals from northern wells
View article: Turbidites in the Eocene of Spitsbergen: Can they tell us something about the Sørvestsnaget Basin?
Turbidites in the Eocene of Spitsbergen: Can they tell us something about the Sørvestsnaget Basin? Open
The Eocene of Spitsbergen, Svalbard, has received considerable attention in the literature because of its spectacular seismic-scale clinforms exposed along many fiords and valleys. High quality outcrops enables downdip tracing of facies be…
View article: Regional north-south seismic cross section. Depositional history of a condensed shallow marine reservoir succession: stratigraphy and detrital zircon geochronology of the Jurassic Stø Formation, Barents Sea
Regional north-south seismic cross section. Depositional history of a condensed shallow marine reservoir succession: stratigraphy and detrital zircon geochronology of the Jurassic Stø Formation, Barents Sea Open
Supplementary Figure S6: Regional north-south seismic cross section
View article: Evidence for Late Triassic provenance areas and Early Jurassic sediment supply turnover in the Barents Sea Basin of northern Pangea
Evidence for Late Triassic provenance areas and Early Jurassic sediment supply turnover in the Barents Sea Basin of northern Pangea Open
We used detrital zircon fractions from the Late Triassic to Early Jurassic sedimentary succession in the Norwegian Barents Sea to constrain the role of eastern provenance areas in the basin infill history of the Northern Pangea Boreal basi…