Results 201 to 210 of about 5,095 (245)

Tephrochronology of North America's most recent arc-sourced ignimbrite flare-up: The Deschutes Formation of the Central Oregon Cascades

, 2021
The dangerous juxtaposition of human populations and active volcanic arcs worldwide makes elucidating the history of explosive eruptions of these arcs a crucial endeavor.
B. Pitcher, A. Kent, A. Grunder
semanticscholar   +1 more source

Tephrochronology and micromorphology of Theran tephra deposits at Palaikastro, Crete

, 2021
This study uses tephrochronology and soil micromorphology to analyze the geochemical and physical properties of five tephra deposits found in Late Minoan IA contexts (excavated in 2003 and 2015) at the Bronze Age site of Palaikastro, Crete, Greece ...
Rachel Kulick, J. Westgate
semanticscholar   +1 more source

Constraining the Baltic Sea sediment chronology using tephrochronology

Geology
Precise and accurate sediment chronologies are essential for studies of past climate change. In the brackish-marine environment of the Baltic Sea, radiocarbon dating is complicated by varying influx of old carbon and reservoir age changes, challenging ...
Daniela Müller, I. Neugebauer, R.J. Kearney, M. Schwab, Oona Appelt, M. Czymzik, Jérôme Kaiser, H. Arz, Achim Brauer   +8 more
semanticscholar   +1 more source

Tephrochronology and chronostratigraphy of the Miocene Chilcatay and Pisco formations (East Pisco Basin, Peru)

, 2020
Strata of Chilcatay and Pisco formations exposed in the Ica Desert (East Pisco Basin, southern Peru) preserve one of the most complete and rich records of Miocene marine vertebrates of the world. Despite its exceptional importance, the chronostratigraphy
G. Bosio, E. Malinverno, I. Villa, C. D. Celma, K. Gariboldi, A. Gioncada, V. Barberini, M. Urbina, G. Bianucci   +8 more
semanticscholar   +1 more source

Holocene tephrochronology in the Northern Cordilleran Volcanic Province, northwestern British Columbia

Canadian journal of earth sciences (Print)
The Northern Cordilleran Volcanic Province (NCVP) of northwestern British Columbia and southwest Yukon is the most active volcanic region in Canada, including both the most recent eruption in Canada and the only eruption with known fatalities.
Shaun Woudstra, B. Jensen
semanticscholar   +1 more source

Bayesian tools for tephrochronology

The Holocene, 2003
It is suggested that Bayesian statistical methods for radiocarbon data interpretation, already widely used in archaeology, also have potential to improve the dating of tephra layers and hence enhance their use for tephrochronology. By re-analysing data from a recently published paper in which the authors sought to identify the calendar date of the ...
Buck, Caitlin E., Higham, Thomas F.G., Lowe, David J.   +2 more
openaire   +2 more sources

Timing of two paleo-positions of the Iceland Ice Sheet margin in Northeast Iceland, at 10.9 and 10.3 ka, indicated by tephrochronology

Jökull: Journal of The Glaciological and Geological Societies of Iceland
The Preboreal ice-sheet in Northeast Iceland received major tephra falls during its southwards retreat. Such air fall events can affect melting of the ice sheet and cause temporary standstills or even advances if tephra thickness on ablation areas ...
Guðrún Larsen, Jón Eiríksson, E. R. Guðmundsdóttir, Óskar Knudsen   +3 more
semanticscholar   +1 more source

Detailed tephrochronology and composition of major Holocene eruptions from Avachinsky, Kozelsky, and Koryaksky volcanoes in Kamchatka

, 2020
Avachinsky, Kozelsky, and Koryaksky volcanoes form one of the most volcanically active clusters in the Kamchatka volcanic arc and are located in close proximity of the cities of Petropavlovsk-Kamchatsky and Elizovo – the most populated area in Kamchatka.
S. Krasheninnikov, L. Bazanova, V. Ponomareva, M. Portnyagin   +3 more
semanticscholar   +1 more source

Tephrochronological studies in northern England

The Holocene, 1996
Tephrostratigraphic investigations of two upland blanket bogs in northern England show that micro scopic layers of tephra are present. Their geochemistry shows that they are identical to two Icelandic tephra layers of known age found at sites in Scotland and the north of Ireland.
Jonathan R. Pilcher, Valerie A. Hall
openaire   +1 more source

Tephrochronology

The word “tephra” is an all-encompassing term for the explosively erupted, pyroclastic (fragmental) products of a volcanic eruption. Since the early pioneering work of Thorarinsson and others, the value of tephras in providing time-parallel marker horizons or isochrons is now well understood.
Alloway, B. V., Lowe, D. J., Jensen, B. J. L., Plunkett, G.   +3 more
openaire   +2 more sources