Results 21 to 30 of about 1,526 (164)

Organic geochemistry of an Upper Jurassic – Lower Cretaceous mudstone succession in a narrow graben setting, Wollaston Forland Basin, North-East Greenland

GEUS Bulletin, 2023
The Oxfordian–Ryazanian was a period of widespread deposition of marine organic-rich mudstones in basins formed during the early phases of the rifting that heralded the formation of the present-day North Atlantic.
Jørgen A. Bojesen-Koefoed, Peter Alsen, Morten Bjerager, Jussi Hovikoski, Peter N. Johannessen, Henrik Nøhr-Hansen, Henrik I. Petersen, Stefan Piasecki, Henrik Vosgerau   +8 more
doaj   +1 more source

The Rødryggen-1 and Brorson Halvø-1 fully cored boreholes (Upper Jurassic – Lower Cretaceous), Wollaston Forland, North-East Greenland – an introduction

GEUS Bulletin, 2023
Two fully cored boreholes, the Rødryggen-1 and the Brorson Halvø-1, were drilled in Wollaston Forland, North-East Greenland, in 2009 and 2010, respectively.
Jørgen A. Bojesen-Koefoed, Peter Alsen, Morten Bjerager, Jussi Hovikoski, Jon R. Ineson, Peter N. Johannessen, Mette Olivarius, Stefan Piasecki, Henrik Vosgerau   +8 more
doaj   +1 more source

Modeling Depth of the Redox Interface at High Resolution at National Scale Using Random Forest and Residual Gaussian Simulation

Water Resources Research, 2019
The management of water resources needs robust methods to efficiently reduce nitrate loads. Knowledge on where natural denitrification takes place in the subsurface is thereby essential.
Julian Koch, Simon Stisen, Jens C. Refsgaard, Vibeke Ernstsen, Peter R. Jakobsen, Anker L. Højberg   +5 more
doaj   +1 more source

A hidden succession revealed: Cretaceous and Paleocene sediments and a native-iron-bearing lava flow in cores near Qullissat, Disko, West Greenland

GEUS Bulletin
Over long stretches of the north-east coast of Qeqertarsuaq (Disko), the sediments in the Nuussuaq Basin and their relations to the volcanic rocks are concealed beneath numerous landslides. Two cores south of Qullissat drilled by Falconbridge Ltd in 1994,
Lotte Melchior Larsen, Gunver Krarup Pedersen, Henrik Nøhr-Hansen, Asger Ken Pedersen, Jørgen A. Bojesen-Koefoed, Erik Vest Sørensen, Sofie Lindström   +6 more
doaj   +1 more source

CAMELS-DK: hydrometeorological time series and landscape attributes for 3330 Danish catchments with streamflow observations from 304 gauged stations [PDF]

Earth System Science Data
Large samples of hydrometeorological time series and catchment attributes are critical for improving the understanding of complex hydrological processes, hydrological model development, and performance benchmarking.
J. Liu, J. Koch, S. Stisen, L. Troldborg, A. L. Højberg, H. Thodsen, M. F. T. Hansen, R. J. M. Schneider   +7 more
doaj   +1 more source

Middle Jurassic sandstone deposition in the Wandel Sea Basin: evidence from cardioceratid and kosmoceratid ammonites in the Mågensfjeld Formation in Kilen, North Greenland

GEUS Bulletin, 2020
Age assessments from both palynostratigraphy and macrofossil biostratigraphy of the sandstone-dominated Mågensfjeld Formation, Wandel Sea Basin, North Greenland were hitherto hampered by post-burial thermal degradation of dinoflagellate cysts and a lack ...
Peter Alsen, Jussi Hovikoski, Kristian Svennevig   +2 more
doaj   +1 more source

Reconstructing Greenland Ice Sheet meltwater discharge through the Watson River (1949–2017)

Arctic, Antarctic, and Alpine Research, 2018
Ice-sheet melting is the primary water source for the proglacial Watson River in southern west Greenland. Discharge from the large, approximately 12,000 km2 ice-sheet catchment draining through the Watson River has been monitored since 2006.
Dirk van As, Bent Hasholt, Andreas P. Ahlstrøm, Jason E. Box, John Cappelen, William Colgan, Robert S. Fausto, Sebastian H. Mernild, Andreas Bech Mikkelsen, Brice P.Y. Noël, Dorthe Petersen, Michiel R. van den Broeke   +11 more
doaj   +1 more source

Mudstone diagenesis and sandstone provenance in an Upper Jurassic – Lower Cretaceous evolving half-graben system, Wollaston Forland, North-East Greenland

GEUS Bulletin, 2023
The influence of rifting on the composition of Kimmeridgian to Barremian mudstones from northern Wollaston Forland, North-East Greenland is investigated by petrographic and mineralogical analyses of the Brorson Halvø-1 and Rødryggen-1 cores, and ...
Mette Olivarius, Afsoon M. Kazerouni, Rikke Weibel, Thomas F. Kokfelt, Jussi Hovikoski   +4 more
doaj   +1 more source

Assessment of complex subsurface redox structures for sustainable development of agriculture and the environment

Environmental Research Letters, 2021
Cost-efficient targeted nitrogen (N) regulation of agriculture with low impact on the environment is the new N regulation paradigm. It requires detailed knowledge on the geological and geochemical conditions of the subsurface that is crucial for ...
Birgitte Hansen, Denitza D Voutchkova, Peter B E Sandersen, Anders Kallesøe, Lærke Thorling, Ingelise Møller, Rasmus B Madsen, Rasmus Jakobsen, Jens Aamand, Pradip Maurya, Hyojin Kim   +10 more
doaj   +1 more source

Flow‐pattern evolution of the Scandinavian Ice Sheet indicated by the subglacial lineation record over Norway, Sweden and Finland

Boreas, EarlyView.
We present a 25‐stage reconstruction of the ice‐flow pattern evolution of the Scandinavian Ice Sheet based on mapping and analysis of ~240 000 subglacial lineations and lineation fields across Norway, Sweden, Finland, and parts of NW Russia. Our reconstruction uses a glacial geomorphological inversion approach, in which we generated 611 individual ...
Frances E. G. Butcher, Anna L. C. Hughes, Helen E. Dulfer, Christopher D. Clark, Jeremy C. Ely, Emma L. M. Lewington, Benjamin M. Boyes, Alex C. Scoffield, Stephen Howcutt, Christiaan R. Diemont   +9 more
wiley   +1 more source