Results 1 to 10 of about 771 (201)

Using Soil Stratigraphy and Tephrochronology to Understand the Origin, Age, and Classification of a Unique Late Quaternary Tephra-Derived Ultisol in Aotearoa New Zealand [PDF]

Quaternary, 2019
In this article, I show how an Ultisol, representative of a globally-important group of soils with clay-rich subsoils, low base saturation, and low fertility, in the central Waikato region in northern North Island, can be evaluated using soil ...
David J. Lowe
doaj   +2 more sources

Marine tephrochronology: a personal perspective [PDF]

Geological Society, London, Special Publications, 2014
This special volume on marine tephrochronology is remarkable, and timely, because it marks a concerted step towards what might be informally termed ‘phase 3’ of a revolution in Quaternary geosciences that began around 40 years ago. The 10 articles collectively represent a re-focussed examination of tephras and cryptotephras preserved in ocean sediments
David J. Lowe
openaire   +4 more sources

TEPHROCHRONOLOGY [PDF]

, 2014
Tephrochronology is the use of primary, characterized tephras or cryptotephras as chronostratigraphic marker beds to connect and synchronize geological, paleoenvironmental, or archaeological sequences or events, or soils/paleosols, and, uniquely, to transfer relative or numerical ages or dates to them using stratigraphic and age information together ...
Lowe, David J., Alloway, Brent V.
  +7 more sources

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

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   +2 more sources

Tephrochronology in Aotearoa New Zealand

New Zealand Journal of Geology and Geophysics, 2021
Tephra deposits in Aotearoa New Zealand (ANZ) have been studied for >180 years. The now-global discipline of tephrochronology, which has some developmental roots in ANZ, forms the basis of a powerful chronostratigraphic correlational tool and age-equivalent dating method for geological, volcanological, palaeoenvironmental, and archaeological ...
Jenni L. Hopkins, David J. Lowe, Joanna L. Horrocks   +2 more
openaire   +3 more sources

Tephrochronology and Absolute Age Determination

The Quaternary Research (Daiyonki-Kenkyu), 1967
Most tephrochronological studies based upon absolute ages are derived from historical records of eruption and radiocarbon dates from Holocene and Pleistocene times. However, unless associated with some organic matters whose ages are younger than 35, 000 years old, tephra layers usually could not be dated.Recently Kigoshi explored the possibility that ...
Kunio Kobayashi
openaire   +3 more sources

Cosmogenic helium signatures at Deception Island volcano (Antarctica): geochronological implications for its eruptive history [PDF]

Scientific Reports
Cosmogenic nuclei production for dating the Earth surface exposure of rock/mineral samples, especially 3He, is a robust technique in geochronology. We describe its application to constrain the ages of key eruptive episodes of the volcanic history of ...
Antonio M. Álvarez-Valero, Hirochika Sumino, Ray Burgess, Lara Arribas, Antonio Polo-Sánchez, Adelina Geyer, Antonio Caracausi, Helena Albert, Meritxell Aulinas, Masao Ban, Javier Borrajo, Marcos García-Arias, Genki Ichikawa, Gabor Kereszturi, José Antonio Lozano Rodríguez   +14 more
doaj   +2 more sources

Cryptotephras in the marine sediment record of the Edisto Inlet, Ross Sea: Implications for the volcanology and tephrochronology of northern Victoria Land, Antarctica

Quaternary Science Advances, 2023
We present the results of the tephrochronology study of a 14.49 m long marine sediment core (TR 17–08) collected in the Edisto Inlet, Ross Sea (Antarctica).
Alessio Di Roberto, Giuseppe Re, Bianca Scateni, Maurizio Petrelli, Tommaso Tesi, Lucilla Capotondi, Caterina Morigi, Giacomo Galli, Ester Colizza, Romana Melis, Fiorenza Torricella, Patrizia Giordano, Federico Giglio, Andrea Gallerani, Karen Gariboldi   +14 more
doaj   +2 more sources

The Omachi Tephra Formations and Tephrochronology

The Quaternary Research (Daiyonki-Kenkyu), 1972
The tephras supplied from Late Quaternary volcanoes in Central Japan have been distinguished into some tephra regions. In this paper, the author has made the characterization, classification and tephrochronologic consideration of the Omachi Tephra formations, which are developed in the Omachi Tephra region.
Hiroshi Machida
openaire   +4 more sources

Some Basic Problems in Tephrochronology

The Quaternary Research (Daiyonki-Kenkyu), 1972
So much tephra deposits which are popularly called “Loam” or “Brown ash”, obscure discrimination of particular tephra layer from many others within the Quaternary section in Japan. Detailed description in petrography and in lithology is therefore needed for characterizing any particular tephra layers.
Kunio Kobayashi
openaire   +3 more sources