Results 71 to 80 of about 623,895 (284)

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   +1 more source

Origin of the Bulge Topography Within Caloris Basin, Mercury

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract Caloris basin on Mercury has a massive circular bulge topography imprinted with unique fault sets. A variety of deformational processes have been proposed to have influenced their formation, including both global contraction and basin evolution, as well as the deposition and weight of the volcanic infill.
G. Schmidt, V. Galluzzi, A. Sepe, S. Buoninfante, B. De Toffoli, L. Ferranti, P. Palumbo   +6 more
wiley   +1 more source

Rapid caldera subsidence and fluctuating eruption dynamics: the lithostratigraphy and structure of the Loch Bà Caldera, Isle of Mull, NW Scotland

Volcanica
Caldera-forming eruptions represent extremely hazardous events. The Loch Bà Caldera on the Isle of Mull, NW Scotland, preserves an ~120 m thick sequence of Palaeogene silicic pyroclastic rocks and collapse breccias.
Peter Nicholls, David Brown, Ross Dymock
doaj   +1 more source

Voluminous Inflated Lobate Flows on the Distal Rift Zones of Axial Seamount, Juan de Fuca Spreading Ridge

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 1, January 2026.
Abstract Three voluminous inflated lobate lava flow complexes on the distal rifts of Axial Seamount are much larger than other known flows in the global spreading system. Each complex is 65–100 km2, is up to 130 m thick, and is ∼3.0–4.6 km3, almost 100 times the volumes of historical Axial flows.
Jennifer B. Paduan, David A. Clague, David W. Caress, Ryan Portner, Morgane Le Saout, Brian Dreyer   +5 more
wiley   +1 more source

Magnetic characteristics of the Ság-hegy volcanic complex, little Hungarian Plain [PDF]

, 2006
The Ság-hegy volcanic complex is located in the little Hungarian Plain Volcanic Field (LHPVF). An 39Ar/ 40Ar geochronolgy gave an isochron age of 5,42 ±0,06 My for the Ság- hegy (Wijbrans et al. 2004).
Auer, Andreas, de Wall, Helga, Dvorazik, Nina, Martin, Ulrike, Nemeth, Karoly, Rolf, Christoph   +5 more
core   +2 more sources

The Magmatic‐Hydrothermal System of the Three Sisters Volcanic Cluster, Oregon, Imaged From Field Gravity Measurements

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 1, January 2026.
Abstract From 2019 to 2024, gravity surveys were conducted at the Three Sisters volcanic cluster (TSVC), measuring 246 gravity sites using a spring relative gravimeter. We calculated the residual Bouguer anomaly and identified three main zones with negative anomalies, ranging from −4 to −8 mGal, located southwest and west of South Sister, within an ...
Hélène Le Mével, Nathan L. Andersen, Annika E. Dechert, Josef Dufek   +3 more
wiley   +1 more source

Zircon U–Pb ages of the Paleozoic volcaniclastic strata in the Junggar Basin, NW China

Open Geosciences
A large set of Paleozoic volcaniclastic rocks is exposed in the northwestern margin of the Junggar Basin from the southern part of the Central Asian Orogenic Belt.
Chun Fan
doaj   +1 more source

Analisis stratigrafi awal kegiatan Gunung Api Gajahdangak di daerah Bulu, Sukoharjo; Implikasinya terhadap stratigrafi batuan gunung api di Pegunungan Selatan, Jawa Tengah

Indonesian Journal on Geoscience, 2014
http://dx.doi.org/10.17014/ijog.vol4no3.20091Generally, Tertiary volcanisms in the Southern Mountains, Central Jawa were started with the formation of pillow lavas having basalt to basaltic andesite in composition.
Hill Gendoet Hartono, Sutikno Bronto
doaj   +1 more source

Geological constraints for a conceptual evolutionary model of the slope deformations affecting Mt. Nuovo at Ischia (Italy) [PDF]

, 2015
ischia island was the scenario of several Holocene slope in- stability events occurred at different scales, from shallow mass movements, triggered by meteo-climatic forcing, up to massive rock slope failures such as large debris avalanches these last ...
DELLA SETA, Marta, ESPOSITO, CARLO, MARMONI, GIANMARCO, MARTINO, Salvatore, PACIELLO, ANTONELLA, PERINELLI, cristina, SOTTILI, Gianluca   +6 more
core   +1 more source

Crustal Structure Across the Okavango Rift, Botswana: The SEISORZ Wide‐Angle Seismic Experiment

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 1, January 2026.
Abstract The Okavango Rift Zone (ORZ) is an incipient continental rift in Botswana at the terminus of the Southwestern Branch of the East African Rift System. The lack of syn‐rift magmatism and tectonic processes overprinting pre‐rift structures provide an opportunity to investigate incipient‐stage rift processes and the role of pre‐existing structures
J. Pablo Canales, Lucky Moffat, Kebabonye Laletsang, Daniel Lizarralde, Steven Harder, Galen Kaip, Estella A. Atekwana, Motsoptse P. Modisi   +7 more
wiley   +1 more source