Results 21 to 30 of about 4,329 (248)

High-resolution stalagmite stratigraphy supports the Late Holocene tephrochronology of southernmost Patagonia

Communications Earth & Environment, 2022
South Patagonian speleothems yield chemical volcanogenic signals and tephra, which can be used to date regional volcanic eruptions and correlate them with the existing tephrochronology, according to geochemical analyses and micro-/nanoscale observations.
Björn Klaes, Gerhard Wörner, Katrina Kremer, Klaus Simon, Andreas Kronz, Denis Scholz, Carsten W. Mueller, Carmen Höschen, Julian Struck, Helge Wolfgang Arz, Sören Thiele-Bruhn, Daniel Schimpf, Rolf Kilian   +12 more
doaj   +1 more source

Radiocarbon Dating and Tephrochronology in Kamchatka [PDF]

Radiocarbon, 1993
We discuss results of 14C dates obtained from areas of young volcanoes in Kamchatka. We apply these dates to reconstructing regional volcanic activity during the Holocene.
Braitseva O.A., Sulerzhitsky L.D., Litasova S.N., Melekestsev I.V., Ponomareva V.V.   +4 more
openaire   +3 more sources

Smoking guns and volcanic ash: the importance of sparse tephras in Greenland ice cores

Polar Research, 2020
Volcanic ash (fine-grained tephra) within Greenland ice cores can complement the understanding of past volcanism and its environmental and societal impacts.
Gill Plunkett, Michael Sigl, Jonathan R. Pilcher, Joseph R. McConnell, Nathan Chellman, J.P. Steffensen, Ulf Büntgen   +6 more
doaj   +1 more source

SYMPOSIUM: RECENT PROGRESS IN TEPHROCHRONOLOGY OF JAPAN

Geographical Review of Japan, 1978
Hiroshi Machida
openalex   +4 more sources

Tephrochronology and Provenance of an Early Pleistocene (Calabrian) Tephra From IODP Expedition 374 Site U1524, Ross Sea (Antarctica)

Geochemistry, Geophysics, Geosystems, 2021
We present a full characterization of a 20 cm‐thick tephra layer found intercalated in the marine sediments recovered at Site U1524 during International Ocean Discovery Program (IODP) Expedition 374, in the Ross Sea, Antarctica.
A. Di Roberto, B. Scateni, G. Di Vincenzo, M. Petrelli, G. Fisauli, S. J. Barker, P. Del Carlo, F. Colleoni, D. K. Kulhanek, R. McKay, L. De Santis, The IODP Expedition 374 Scientific Party   +11 more
doaj   +1 more source

The Medial Offshore Record of Explosive Volcanism Along the Central to Eastern Aegean Volcanic Arc: 2. Tephra Ages and Volumes, Eruption Magnitudes and Marine Sedimentation Rate Variations

Geochemistry, Geophysics, Geosystems, 2021
We use the tephrostratigraphic framework along the Aegean Volcanic Arc established in Part 1 of this contribution to determine hemipelagic sedimentation rates, calculate new tephra ages, and constrain the minimum magnitudes of (sub)plinian eruptions of ...
S. Kutterolf, A. Freundt, T. H. Druitt, J. McPhie, P. Nomikou, K. Pank, J. C. Schindlbeck‐Belo, T. H. Hansteen, S. R. Allen   +8 more
doaj   +1 more source

Probabilistic Source Classification of Large Tephra Producing Eruptions Using Supervised Machine Learning: An Example From the Alaska‐Aleutian Arc

Geochemistry, Geophysics, Geosystems, 2023
Alaska contains over 130 volcanoes and volcanic fields that have been active within the last 2 million years. Of these, roughly 90 have erupted during the Holocene, with many characterized by at least one large explosive eruption.
Jordan Lubbers, Matthew Loewen, Kristi Wallace, Michelle Coombs, Jason Addison   +4 more
doaj   +1 more source

Chronological Assessment of the Balta Alba Kurgan Loess-Paleosol Section (Romania) – A Comparative Study on Different Dating Methods for a Robust and Precise Age Model

Frontiers in Earth Science, 2021
Loess-paleosol sequences (LPSs) are important terrestrial archives of paleoenvironmental and paleoclimatic information. One of the main obstacles for the investigation and interpretation of these archives is the uncertainty of their age-depth ...
Stephanie Scheidt, Sonja Berg, Ulrich Hambach, Ulrich Hambach, Nicole Klasen, Stephan Pötter, Alexander Stolz, Daniel Veres, Christian Zeeden, Dominik Brill, Helmut Brückner, Stephanie Kusch, Christian Laag, Christian Laag, Frank Lehmkuhl, Martin Melles, Florian Monnens, Lukas Oppermann, Janet Rethemeyer, Janina J. Nett   +19 more
doaj   +1 more source

Holocene carbon accumulation in the peatlands of northern Scotland [PDF]

Mires and Peat, 2018
The response of peatland carbon accumulation to climate can be complex, with internal feedbacks and processes that can dampen or amplify responses to external forcing.
J.L. Ratcliffe, R.J. Payne, T.J. Sloan, B. Smith, S. Waldron, D. Mauquoy, A. Newton, A.R. Anderson, A. Henderson, R. Andersen   +9 more
doaj   +1 more source

Hiroshi Machida −respected tephrochronologist, teacher, leader [PDF]

, 2011
Professor Emeritus Hiroshi Machida (Hiroshi hereafter) is the leading tephrochronologist of his generation in Japan. Perhaps more than any other geoscientist from Japan, Hiroshi carried the insights and advances of tephra studies and their application in
Lowe, David J., Moriwaki, Hiroshi, Suzuki, Takehiko   +2 more
core   +2 more sources