Results 81 to 90 of about 1,160 (210)
GeoHazardsThe Lac Fallère area in the upper Clusellaz Valley (tributary of the middle Aosta Valley) is shaped in micaschist and gneiss (Mont Fort Unit, Middle Penninic) and in calcschist and marble (Aouilletta Unit, Combin Zone).
Stefano Dolce +3 more
doaj +1 more source
Journal of Geophysical Research: Planets, Volume 131, Issue 7, July 2026.Abstract We estimate the cosmic dust flux to Earth through the study of rare micrometeorites that preserve part of their precursor features during atmospheric entry heating, namely unmelted and scoriaceous subtypes. Combining high‐precision mass balance measurements, X‐ray computed microtomography and scanning electron microscopy, we studied mass, size
S. Ottaviani +7 more
wiley +1 more source
Boreas, Volume 55, Issue 3, Page 612-669, July 2026.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 +9 more
wiley +1 more source
Late Holocene moisture variability in Arctic Alaska from chitin δ18O
Boreas, Volume 55, Issue 3, Page 751-767, July 2026.Amplified warming in the Arctic has resulted in reduced sea‐ice extent, which can impact regional climate dynamics. Elucidating past moisture variability in response to changing temperatures and sea‐ice conditions can offer insight into how anthropogenic climate change may impact Arctic areas such as the Alaskan North Slope in the future. We contribute
Briana A. Edgerton, Melissa L. Chipman
wiley +1 more source
Boreas, Volume 55, Issue 3, Page 790-807, July 2026.Understanding the course and dynamics of ancient river systems, such as the pre‐Odra, provides valuable insights into the post‐glacial evolution of landscapes and riverine processes. The northwest‐trending pre‐Odra was an important drainage system of the European mainland into the Baltic Basin during and after the Scandinavian Ice Sheet retreat ...
Maryse C. Schmidt +4 more
wiley +1 more source
Palaeowinds and depositional conditions from Holocene loess in Sweden and Finland
Boreas, Volume 55, Issue 3, Page 808-834, July 2026.The nature of deglacial and Holocene wind regimes in Fennoscandia is debated, as is the degree to which wind‐blown loess deposits exist in the region. Loess deposits in Fennoscandia are often relatively thin, discontinuous and less well‐sorted than typical loess, and questions remain over the degree of their post‐depositional reworking and the impact ...
Calum J. Edward +6 more
wiley +1 more source
Boreas, Volume 55, Issue 3, Page 717-750, July 2026.Map of Lower sediment (LS) thickness is a surrogate for the distribution of Thorncliffe Formation (TF) and ~75% of TF thickness from the slope of Niagara Escarpment east to Brighton. Inset images show the LS sequence at the Don Valleys brickyards (DVBY) and undeformed TF sand and gravel (~15 m) below Newmarket Till (NT) at sites L and Co.
David R. Sharpe +3 more
wiley +1 more source
De Geer moraines in Finland and the annual moraine problem
Fennia: International Journal of Geography, 1987 The study has two main aims: (1) a description of the characterizing features of the morphology, material structure and mode of occurrence of De Geer moraines in Finland, and (2) conclusions about the depositional mechanism and the geochronological ...
Harry Zilliacus
doaj
Boreas, Volume 55, Issue 3, Page 702-716, July 2026.Effective and sustainable land use, conservation, and the use of geological resources (incl. raw materials, aggregates and groundwater) require a clear classification system of sedimentary units, with well‐defined vocabulary and unified mapping practices.
Jussi Hovikoski +6 more
wiley +1 more source
Boreas, Volume 55, Issue 3, Page 670-701, July 2026.Rapid thaw of the Earth's cryosphere in response to anthropogenic warming highlights the need to identify and understand the contrasting signatures of past ice‐sheet stability and collapse. The Kvarken archipelago, western Finland, at the centre of the former Fennoscandian Ice Sheet (FIS), has been designated a UNESCO World Heritage site in recognition
Niko Putkinen +6 more
wiley +1 more source