Results 31 to 40 of about 25,642 (273)

Aquatic community response to volcanic eruptions on the Ecuadorian Andean flank: evidence from the palaeoecological record [PDF]

, 2017
Aquatic ecosystems in the tropical Andes are under increasing pressure from human modification of the landscape (deforestation and dams) and climatic change (increase of extreme events and 1.5 °C on average temperatures are projected for AD 2100 ...
A Araneda, A Thienemann, AAJ Chepstow-Lusty, AE Self, AF Lotter, AWR Seddon, D Hodgson, DA Livingstone, DF Porinchu, E Montoya, Encarni Montoya, F Barberi, F Matthews-Bird, F Matthews-Bird, Frazer Matthews-Bird, G Eicher, G Harling, GA Zielinski, H Ellenberg, H Hooghiemstra, I Kurenkov, J-L Pennec Le, J-L Pennec Le, JA Baross, JJ Williams, JR Telford, K Faegri, K Rademaker, KA Haberyan, KD Bennett, KJ Collier, LC Pinder, M Blaauw, M Hickman, M Kessler, MJ Bas Le, ML Hall, ML Hall, ML Hall, ML Heinrichs, N Michelutti, P Barker, P Mothes, PA Colinvaux, Patricia Mothes, Pauline Gulliver, PD Armitage, R Schulz, RJ Hijmans, RJ Telford, S Fazlullin, S Shoji, SE Abella, SJ Brooks, Stephen J. Brooks, WD Gosling, William D. Gosling   +56 more
core   +5 more sources

Correlation of Papanetu Tephra to Karapiti Tephra, central North Island, New Zealand [PDF]

New Zealand Journal of Geology and Geophysics, 1986
Abstract New road exposures around Lake Rotoaira and south and east of Lake Taupo have provided the opportunity to re-examine the stratigraphic relationships between the rhyolitic Papanetu and Karapiti Tephras (c. 10 000 years B.P.). Papanetu Tephra is everywhere typical of a distal rhyolitic tephra; it is thin (< 2 cm), fine grained, and forms ...
Graeme J. Solloway, Paul C. Froggatt
openaire   +2 more sources

Ice core evidence for a second volcanic eruption around 1809 in the Northern Hemisphere [PDF]

, 2006
A volcanic signal observed in ice cores from both polar regions six years prior to Tambora is attributed to an unknown tropical eruption in 1809. Recovery of dacitic tephra from the 1809 horizon in a Yukon ice core (Eclipse) that is chemically distinct ...
Germani, Mark S, Kreutz, K, Wake, Cameron P., Whitlow, Sallie I, Yalcin, Kaplan   +4 more
core   +3 more sources

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

Coastal dunes of Urup Island (Kuril Islands, North-Western Pacific): palaeoclimatic and environmental archive [PDF]

Геосистемы переходных зон, 2022
The Late Holocene phases of aeolian processes have been reconstructed on the basis of dune fields construction. The palaeoenvironmental studies were targeted to following problems: 1) to determine the periods of higher and lower activity of aeolian ...
Nadezhda G. Razjigaeva, Larisa A. Ganzey, Khikmatulla A. Arslanov, Nina F. Pshenichnikova   +3 more
doaj   +1 more source

Natural and anthropogenic lead in sediments of the Rotorua lakes, New Zealand [PDF]

, 2010
Global atmospheric sources of lead have increased more than 100-fold over the past century as a result of deforestation, coal combustion, ore smelting and leaded petroleum. Lead compounds generally accumulate in depositional areas across the globe where,
Balance, Bindler, Burns, Burns, C.H. Hendy, Chow, D.P. Hamilton, Davies, Edgington, Eisenreich, Fish, Flint, Graney, Harrison, Hogg, Hong, Håkanson, L.K. Pearson, Lowe, Lowe, Martin, McColl, McColl, McColl, Ministry of Commerce, Monna, Murozuni, Newnham, Nriagu, Pullar, R.C. Pickett, Renberg, Renberg, Rosman, Schindler, Settle, Settle, Shen, Shotyk, Sigg, Statistics New Zealand, Sturges, Timperley, Timperley, Trolle, Veron, Vincent, Wilson   +47 more
core   +2 more sources

Residential building and occupant vulnerability to tephra fall [PDF]

Natural Hazards and Earth System Sciences, 2005
Plinian and subplinian volcanic eruptions can be accompanied by tephra falls which may last hours or days, posing threats to people, buildings and economic activity. Numerous historical examples exist of tephra damage and tephra casualties.
R. J. S. Spence, I. Kelman, P. J. Baxter, G. Zuccaro, S. Petrazzuoli   +4 more
doaj  

Zircon of Triassic Age in the Stuttgart Formation (Schilfsandstein)—Witness of Tephra Fallout in the Central European Basin and New Constraints on the Mid-Carnian Episode

Frontiers in Earth Science, 2021
The Carnian Stuttgart-Formation (Schilfsandstein) of the Central European Basin contains relics of Triassic volcanic detritus in form of euhedral zircon grains and authigenic analcime.
Armin Zeh, Armin Zeh, Matthias Franz, Karsten Obst   +3 more
doaj   +1 more source

A summary of terminology used in tephra-related studies [PDF]

, 2001
The word ‘tephra’, derived from a Greek word for ash, is a collective term for all the unconsolidated, primary pyroclastic products of a volcanic eruption.
Hunt, John B., Lowe, David J.
core   +3 more sources

A dataset for distribution and characteristics of Holocene pyroclastic fall deposits along the Pacific coasts in western Hokkaido, Japan

Data in Brief, 2020
The tephra layers known with eruption ages play an important role in an investigation of tsunami history and archaeology in addition to volcanic history in Hokkaido, Japan.
Ryo Nakanishi, Juichiro Ashi, Satoshi Okamura   +2 more
doaj   +1 more source