Results 71 to 80 of about 1,251 (191)

Discovery of Mount Mazama cryptotephra in Lake Superior (North America): Implications and potential applications [PDF]

Geology, 2017
Tephrochronology is a widely applied method recognized for its exceptional precision in geologic dating and stratigraphic correlation. Tephra from the ~7.6 kyr B.P. Mount Mazama caldera-forming (”climactic”) eruption have been widely identified and applied as stratigraphic isochrons sediments of northwestern North America, as well as in the Greenland ...
Spano, NG, Lane, CS, Francis, SW, Johnson, TC   +3 more
openaire   +1 more source

The magnitude and impact of the Youngest Toba Tuff super-eruption

Frontiers in Earth Science, 2014
Super-eruptions, orders of magnitude larger than eruptions experienced in historic times, have devastated wide areas by pyroclastic flows, covered continent-size areas by ash fallout, and injected large quantities of aerosols into the stratosphere ...
Antonio eCosta, Victoria eSmith, Giovanni eMacedonio, Naomi eMatthews   +3 more
doaj   +1 more source

Offshore Record of Explosive Volcanic Eruptions in the Southern Part of the Panamá Basin During the Past 10 Myr: 2. Inferences About the Construction of the Northern Andean Arc and Regional Geodynamics

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 9, September 2025.
Abstract Volcanic material preserved in marine and lacustrine sediments is a key high‐resolution archive for studying the past eruptive history of volcanic regions. In this work, we use the geochemical and isotopic compositions of marine volcanic glass shards, the thicknesses, and age models of tephra layers preserved in the deep sediments of the ...
Mathilde Bablon, Pablo Samaniego, Jean‐Luc Le Pennec, François Nauret, François Michaud, Marianne Saillard, Silvana Hidalgo, Jean‐Luc Devidal, François Orange, Céline Liorzou, Gueorgui Ratzov   +10 more
wiley   +1 more source

Challenges in dating blanket peat and implications for understanding its initiation in Ireland

Journal of Quaternary Science, Volume 40, Issue 6, Page 996-1009, August 2025.
ABSTRACT Blanket peat is widespread in maritime extra‐tropical environments. Prehistoric land‐use activity was traditionally invoked as the stimulus of blanket peat initiation in the British Isles, but recently, climate has been viewed as the driver of peat formation.
Helen Essell, Gill Plunkett, Maarten Blaauw   +2 more
wiley   +1 more source

First evidence of cryptotephra in palaeoenvironmental records associated with Norse occupation sites in Greenland [PDF]

Quaternary Geochronology, 2015
The Norse/Viking occupation of Greenland is part of a dispersal of communities across the North Atlantic coincident with the supposed Medieval Warm Period of the late 1st millennium AD. The abandonment of the Greenland settlements has been linked to climatic deterioration in the Little Ice Age as well as other possible explanations.
Blockley, Simon P.E., Edwards, Kevin J., Schofield, J. Edward, Pyne-O'Donnell, Sean D.F., Jensen, Britta J.L., Matthews, Ian P., Cook, Gordon T., Wallace, Kristi L., Froese, Duane   +8 more
openaire   +1 more source

A multi‐proxy record of climate variability during the Loch Lomond Stadial (GS‐1) at Old Buckenham Mere, East England, UK

Journal of Quaternary Science, Volume 40, Issue 5, Page 778-793, July 2025.
ABSTRACT Northwest Europe experienced high‐amplitude climate change at the onset and end of the Younger Dryas (YD; ca 12 800–11 600 cal a BP), a crucial period to develop our understanding of natural climate dynamics. European palaeoclimatological records generally suggest a bipartite structure of the YD, potentially due to a northward retreat of the ...
Christopher P. Francis, Stefan Engels, Ian P. Matthews, Adrian P. Palmer, Katy Flowers, Ian Candy   +5 more
wiley   +1 more source

Regional beryllium-10 production rate for the mid-elevation mountainous regions in central Europe, deduced from a multi-method study of moraines and lake sediments in the Black Forest [PDF]

Geochronology
Beryllium-10 cosmic-ray exposure (CRE) dating has revolutionized our understanding of glacier fluctuations around the globe. A key prerequisite for the successful application of this dating method is the determination of regional production rates of in ...
F. M. Hofmann, C. Rambeau, L. Gegg, M. Schulz, M. Steiner, A. Fülling, L. Léanni, F. Preusser   +7 more
doaj   +1 more source

Connecting and dating with tephras: principles, functioning, and application of tephrochronology in Quaternary research [PDF]

, 2015
Tephrochronology, the characterisation and use of volcanic-ash layers as a unique chronostratigraphic linking, synchronizing, and dating tool, has become a globally-practised discipline of immense practical value in a wide range of subjects including ...
Lowe, David J.
core   +1 more source

Cryptotephra from a ~120 ka Tondano eruption in a sediment core from Lake Towuti (Indonesia)

Journal of Quaternary Science, Volume 40, Issue 5, Page 741-746, July 2025.
ABSTRACT Southeast Asia is one of the most volcanically active regions in the world, yet their long‐term eruptive history has been comparatively little studied. In particular, little work has explored the potential of sedimentary archives to record distal cryptotephra, which may help in identifying some of the region's larger Quaternary eruptions. Here,
Jinheum Park, Christine S. Lane, Clive Oppenheimer, Céline‐Marie Vidal, Christina J. Manning, Francesca Forni, Hendrik Vogel, Satria Bijaksana, James M. Russell   +8 more
wiley   +1 more source

Revisiting the 10th‐Century Eldgjá Eruption: Modeling the Climatic and Environmental Impacts

Geophysical Research Letters, Volume 52, Issue 1, 16 January 2025.
Abstract The 10th‐century Eldgjá eruption in Iceland is the largest basaltic flood lava eruption of the Common Era. However, the extent of its impacts is unclear due to limited historical records. Combining volcanology and ice‐core analyses from both recent and earlier studies, we present a gas emissions scenario for the Eldgjá eruption spanning 937 to
Herman F. Fuglestvedt, Imogen Gabriel, Michael Sigl, Thorvaldur Thordarson, Kirstin Krüger   +4 more
wiley   +1 more source