Results 31 to 40 of about 4,329 (248)

Holocene record of large explosive eruptions from Chaitén and Michinmahuida Volcanoes, Chile

Andean Geology, 2013
Tephra fall deposits and one large ignimbrite close to Chaitén and Michinmahuida Volcanoes were analyzed for chemistry and radiocarbon dated to correlate the eruptive units and establish the timing of eruptions.
Álvaro Amigo, Luis E. Lara, Victoria C. Smith   +2 more
doaj   +1 more source

Rapid Tephra Identification in Geological Archives With Computed Tomography: Experimental Results and Natural Applications

Frontiers in Earth Science, 2021
Volcanic ash (tephra) horizons represent powerful chronological and stratigraphic markers: rapid and widespread deposition allows for correlation of geological records in time and space.
Willem G. M. van der Bilt, Willem G. M. van der Bilt, Jan Magne Cederstrøm, Eivind W. N. Støren, Eivind W. N. Støren, Sarah M. P. Berben, Sarah M. P. Berben, Sunniva Rutledal, Sunniva Rutledal   +8 more
doaj   +1 more source

Last interglacial sea-level proxies in the glaciated Northern Hemisphere [PDF]

Earth System Science Data, 2022
Because global sea level during the last interglacial (LIG; 130–115 ka) was higher than today, the LIG is a useful approximate analogue for improving predictions of future sea-level rise. Here, we synthesize sea-level proxies for the LIG in the glaciated
A. S. Dalton, E. J. Gowan, E. J. Gowan, E. J. Gowan, J. Mangerud, P. Möller, J. P. Lunkka, V. Astakhov, V. Astakhov   +8 more
doaj   +1 more source

Composite development and stratigraphy of the Onepoto maar lake sediment sequence (Auckland Volcanic Field, New Zealand) [PDF]

Scientific Drilling, 2021
The accurate and precise reconstruction of Quaternary climate as well as the events that punctuate it is an important driver of the study of lake sediment archives.
B. Läuchli, P. C. Augustinus, L. Peti, J. L. Hopkins   +3 more
doaj   +1 more source

Sakurajima-Satsuma (Sz-S) and Noike-Yumugi (N-Ym) tephras: new tephrochronological marker beds for the last deglaciation, southern Kyushu, Japan [PDF]

, 2011
Two prominent tephras, Sakurajima-Satsuma (Sz-S) erupted from Sakurajima volcano and Noike-Yumugi (N-Ym) erupted from Kuchierabujima Island, provide new key marker beds for dating and synchronizing palaeoenvironmental and archaeological records in the ...
Ikehara, Minoru, Lowe, David J., Machida, Hiroshi, Moriwaki, Hiroshi, Murata, Masanori, Suzuki, Takehiko   +5 more
core   +2 more sources

Detection and Characterisation of Eemian Marine Tephra Layers within the Sapropel S5 Sediments of the Aegean and Levantine Seas

Quaternary, 2020
The Eemian was the last interglacial period (~130 to 115 ka BP) to precede the current interglacial. In Eastern Mediterranean marine sediments, it is marked by a well-developed and organic-rich “sapropel” layer (S5), which is thought to ...
Christopher Satow, Katharine M. Grant, Sabine Wulf, Hartmut Schulz, Addison Mallon, Ian Matthews, John Lowe   +6 more
doaj   +1 more source

Distal occurrence of mid-Holocene Whakatane Tephra on the Chatham Islands, New Zealand, and potential for cryptotephra studies [PDF]

, 2011
The Whakatane Tephra, a rhyolitic tephra erupted ca. 5500 cal. BP from Okataina Volcanic Centre, central North Island, has been identified on the Chatham Islands which lie ˜900 km east of Christchurch, New Zealand.
Hogg, Alan G., Holt, Katherine A., Lowe, David J., Wallace, R. Clel   +3 more
core   +2 more sources

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

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   +1 more source

Synchronous or Not? The Timing of the Younger Dryas and Greenland Stadial-1 Reviewed Using Tephrochronology

Quaternary, 2022
The exact spatial and temporal behaviour of rapid climate shifts during the Last Glacial–Interglacial Transition are still not entirely understood. In order to investigate these events, it is necessary to have detailed palaeoenvironmental reconstructions
Simon A. Larsson, Malin E. Kylander, A. Britta K. Sannel, Dan Hammarlund   +3 more
doaj   +1 more source

Detection of Tephra Layers in Antarctic Sediment Cores with Hyperspectral Imaging. [PDF]

PLoS ONE, 2016
Tephrochronology uses recognizable volcanic ash layers (from airborne pyroclastic deposits, or tephras) in geological strata to set unique time references for paleoenvironmental events across wide geographic areas.
Ismael F Aymerich, Marc Oliva, Santiago Giralt, Julio Martín-Herrero   +3 more
doaj   +1 more source