Results 91 to 100 of about 25,642 (273)

Guide to the nature and methods of analysis of the clay fraction of tephras from the South Auckland region, New Zealand. [PDF]

, 1983
The manual outlines some of the more common laboratory procedures available for qualitatively and quantitatively analysing the composition of the tephric clays, many of which are difficult to determine because of their short range order or 'amorphous ...
Lowe, David J., Nelson, Campbell S.
core   +1 more source

Hominin and carnivore roles during the formation of the early Middle Pleistocene site of Loreto (Venosa Basin, southern Italy)

Journal of Quaternary Science, Volume 40, Issue 7, Page 1252-1268, October 2025.
ABSTRACT The site of Loreto (Venosa Basin, Italy) was first discovered in 1929 and subsequently excavated during the latter half of the 20th century. The excavation revealed three archaeo‐palaeontological levels, with the lowermost level (Level A) yielding the largest number of remains.
Antonio Pineda, Beniamino Mecozzi, Alessio Iannucci, Marco Carpentieri, Raffaele Sardella, Suzanne Simone, Marie‐Hélène Moncel   +6 more
wiley   +1 more source

A 100-year record of North Pacific volcanism in an ice core from Eclipse icefield, Yukon Territory, Canada [PDF]

, 2003
A record of regionally significant volcanic eruptions in the North Pacific over the last century has been developed using a glaciochemical record from Eclipse Icefield, Yukon Territory, Canada.
Germani, Mark S, Wake, Cameron P, Yalcin, Kaplan   +2 more
core   +3 more sources

Cryptic Ice Wedge Networks in Holocene Peat, Yukon‐Kuskokwim Delta, Alaska

Permafrost and Periglacial Processes, Volume 36, Issue 4, Page 678-701, October/December 2025.
ABSTRACT The Yukon‐Kuskokwim Delta (YKD), covering ~75,000 km2 of Alaska's discontinuous permafrost zone, has a historic (1902–2023) mean annual air temperature of ~−1°C and was previously thought to lack ice wedge networks. However, our recent investigations near Bethel, Alaska, revealed numerous near‐surface ice wedges.
Benjamin M. Jones, Mikhail Z. Kanevskiy, Melissa K. Ward Jones, Phillip R. Wilson, Isaiah Ditmer, Benjamin V. Gaglioti, Eric S. Klein, Rodrigo C. Rangel, Kristi L. Wallace, Miriam C. Jones, Matthew J. Wooller, Yuri Shur   +11 more
wiley   +1 more source

Using Lake Sediment Cores to Improve Records of Volcanism at Aluto Volcano in the Main Ethiopian Rift

Geochemistry, Geophysics, Geosystems, 2018
Aluto is a silicic volcano in central Ethiopia, flanked by two large population centers and home to an expanding geothermal power plant. Here we present data from two lake sediment cores sampled 12 and 25 km from the volcano, which record at least 24 ...
K. McNamara, K. V. Cashman, A. C. Rust, K. Fontijn, F. Chalié, E. L. Tomlinson, G. Yirgu   +6 more
doaj   +1 more source

Morphology and microtextures of tephra particles

, 2011
The purpose of this PhD thesis is to give insights into the dynamics of highly explosive eruptions and on both tephra dispersal and sedimentation, based on the characterization of the erupted material. A systematic and detailed morphological characterization of tephra particles from different eruptions and the calculation of their terminal fall ...
openaire   +2 more sources

WebTephraCalc: a tephra fall volume estimation system using WebGIS and OGC web services

Earth, Planets and Space
Total tephra fall volume information is helpful in understanding the nature of volcanic activity and the extent of the destruction caused by the phenomenon.
Joel Bandibas, Shinji Takarada
doaj   +1 more source

Magma Budget From Lava and Tephra Volumes Erupted During the 25-26 October 2013 Lava Fountain at Mt Etna

Frontiers in Earth Science, 2018
Determining the volume of the various types of products of a highly frequent active volcano can be very difficult, especially if most of them are deposited on a growing volcanic cone.
Daniele Andronico, Boris Behncke, Emanuela De Beni, Antonino Cristaldi, Simona Scollo, Manuela Lopez, Maria D. Lo Castro   +6 more
doaj   +1 more source

SO₂ emissions from basaltic eruptions, and the excess sulfur issue [PDF]

, 2004
Volcanic SO2 can affect the Earth's environment. Where no direct measurements of SO2 in the atmosphere are available, a petrologic method of assessing sulfur release from the magma must be used.
Blake, S., Kreuger, A.J., Self, S., Sharma, K.   +3 more
core   +1 more source

Variable preservation of the 1991 Hudson tephra in small lakes and on land

Frontiers in Earth Science
Volcanic ash (tephra) preserved in terrestrial environments and lake sediments contains information about volcanic processes and can be used to infer eruptive parameters and frequency of past eruptions, contributing to the understanding of volcanic ...
Richard T. Streeter, Nick A. Cutler, Ian T. Lawson, William Hutchison, Lucia Dominguez, William Hiles   +5 more
doaj   +1 more source